Mitsubishi MUT-II Specifications

23-1
AUTOMATIC
TRANSMISSION
CONTENTS
SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . 2
LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . 4
ON-VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . 46
Essential Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
A/T Control Component Location . . . . . . . . . . . . . 51
23109000347
A/T Control Component Check . . . . . . . . . . . . . . . 52
Torque Converter Stall Test . . . . . . . . . . . . . . . . . . 54
Hydraulic Pressure Test . . . . . . . . . . . . . . . . . . . . . 56
Hydraulic Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Line Pressure Adjustment . . . . . . . . . . . . . . . . . . . . 62
Selector Lever Operation Check . . . . . . . . . . . . . . 62
TRANSMISSION CONTROL* . . . . . . . . . . . . . . 63
TRANSMISSION ASSEMBLY . . . . . . . . . . . . . . 66
WARNING REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICULES
WARNING!
(1) Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to personal
injury or death to service personnel (from inadvertent firing of the air bag) or to driver and passenger (from rendering
the SRS inoperative).
(2) Service or maintenance of any SRS component or SRS-related component must be performed only at an authorized
MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B - Supplemental
Restraint System (SRS) before beginning any service or maintenance of any component of the SRS or any SRS-related
component.
NOTE
The SRS includes the following components: SRS-ECU, SRS warning lamp, air bag module, clock spring, side impact sensors and
interconnecting wiring. Other SRS-related components (that may have to be removed/installed in connection with SRS service or
maintenance) are indicated in the table of contents by an asterisk (*).
23-2
AUTOMATIC TRANSMISSION -
Service Specifications/
Lubricants/Special Tools
SERVICE SPECIFICATIONS
23100030222
Items
Standard value
Oil temperature sensor kW
at 0_C
16.5 - 20.5
at 100_C
0.57 - 0.69
Resistance of damper clutch control solenoid valve coil (at 20_C) W
2.7 - 3.4
Resistance of Low-Reverse solenoid valve coil (at 20_C) W
2.7 - 3.4
Resistance of second solenoid valve coil (at 20_C) W
2.7 - 3.4
Resistance of underdrive solenoid valve coil (at 20_C) W
2.7 - 3.4
Resistance of overdrive solenoid valve coil (at 20_C) W
2.7 - 3.4
Stall speed r/min
2,100 - 2,600
LUBRICANTS
23100040034
Items
Specified lubricant
Quantity L
Transmission fluid
DIA QUEEN ATF SPII or equivalent
7.8
SPECIAL TOOLS
Tool
23100060214
Number
Name
Use
MB991502
MUT-II sub
assembly
Checking of the diagnosis code
MD998330
(including
MD998331)
Oil pressure gauge
(2,942 kPa)
Measurement of oil pressure
MD998332
Adapter
MD998900
Adapter
AUTOMATIC TRANSMISSION - Special Tools
Tool
23-3
Number
Name
Use
MB990635 or
MB991113
Steering linkage
puller
Ball joint disconnection
MB991610
Oil filter wrench
Removal and installation of automatic transmission oil filter
GENERAL
SERVICE
TOOL
MZ203827
Engine lifter
Supporting the engine assembly during
removal and installation of the transmission
MB991453
Engine hanger
assembly
Supporting the engine assembly during
removal and installation of the transmission
23-4
AUTOMATIC TRANSMISSION - Troubleshooting
TROUBLESHOOTING
23100760275
STANDARD FLOW OF DIAGNOSIS TROUBLESHOOTING
Gathering information from customer.
Check trouble symptoms.
Read the diagnosis code (GROUP 00
- How to Use Troubleshooting/Inspection Service Points.)
Communication with
MUT-II not possible
Inspection procedure No. 1 in
Inspection
Chart
For
Trouble
Symptoms (Refer to P.23-27.)
No diagnosis code displayed
Diagnosis code
displayed
Erase the diagnosis code (GROUP
00 - How to Use Troubleshooting/Inspection Service Points.)
Carry out the essential service
(Refer to P.23-46.)
Abnormality exists (no diagnosis code)
Road test (Refer to P.23-6.)
Abnormality exists
(diagnosis code
present)
No abnormality
Recheck diagnosis codes which
were read before the road test.
Diagnosis
code displayed
To INSPECTION CHART
DIAGNOSIS CODES
(Refer to P.23-14.)
FOR
To INSPECTION CHART
TROUBLE SYMPTOMS
(Refer to P.23-26.)
No diagnosis
code displayed
FOR
Search for cause.
Found
Repair
NG
Confirmation test (road test)
OK
NG
Not found
INTERMITTENT MALFUNCTION
(GROUP 00 - Points to Note for
Intermittent Malfunctions.)
OK
Completed
AUTOMATIC TRANSMISSION - Troubleshooting
DIAGNOSIS FUNCTION
1. N range lamp
The N range lamp flashes at a frequency
1 Hz if there is an abnormality in any of
table below which are related to the A/T
the diagnosis code output if the N range
at a frequency of approximately 1 Hz.
23-5
23100770186
of approximately
the items in the
system. Check
lamp is flashing
N range lamp flashing items
Crank angle sensor
Input shaft speed sensor
Output shaft speed sensor
Each solenoid valve
Out of phase at each shift point
Caution
If the N range lamp is flashing at a frequency of
approximately 2 Hz (faster than at 1 Hz), it means that
the automatic transmission fluid temperature is too high.
Stop the vehicle in a safe place and wait until the N range
lamp switches off.
2. Method of reading the diagnosis code
Use the MUT-II or the N range lamp to take a reading of
the diagnosis codes. (Refer to GROUP 00 - How to Use
Troubleshooting/Inspection Service Points.)
23-6
AUTOMATIC TRANSMISSION - Troubleshooting
ROAD TEST
23100780271
Check by the following procedure.
No.
State prior to test
and operation
Test and operation
Judgement value
Check item
Diagnosis
code
No.
Inspection
procedure page
if there is an
abnormality
1
Ignition switch:
OFF
Ignition switch
(1) ON
Data list No. 54
Battery voltage [V]
Control relay
54
A/T Control
relay system
(23-25)
2
Ignition switch:
ON
Engine: Stopped
Selector lever
position: P
Selector lever
position
(1) P, (2) R,
(3) N, (4) D,
(5) 3, (6) 2, (7) L
Data list No. 61
(1) P, (2) R, (3)N,
(4) D, (5) 3, (6) 2,
(7) L
Inhibitor switch
-
Inhibitor switch
system (23-36)
Throttle position sensor
<Vehicles
without TCL>
Accelerator
pedal position
sensor
<Vehicles with
TCL>
11
12
14
Throttle
position sensor
system (23-15)
Accelerator
pedal position
sensor system
(23-15)
Data list No. 25
(1) OFF
(2) ON
Wide open
throttle switch
25
Wide open
throttle switch
system (23-17)
Brake pedal
(1) Depressed
(2) Released
Data list No. 26
(1) ON
(2) OFF
Stop lamp
switch
26
Stop lamp switch
system (23-18)
Data list No. 11
Accelerator pedal
(1) 400 - 1,000 mV
(1) Released
(2) Half depressed (2) Gradually rises
from (1)
(3) Depressed
(3) 4,500 - 5,000
mV
3
Ignition switch:
ST
Engine: Stopped
Starting test with
lever P or N range
Starting should be
possible
Starting
possible or
impossible
-
Starting
impossible
(23-28)
4
Warming up
Drive for 15
minutes or more so
that the automatic
fluid temperature
becomes 70 90_C.
Data list No. 15
Gradually rises to
70 - 90_C
Oil temperature
sensor
15
Oil temperature
sensor system
(23-15)
23-7
AUTOMATIC TRANSMISSION - Troubleshooting
No.
State prior to test
and operation
Test and operation
Judgement value
Check item
Diagnosis
code
No.
Inspection
procedure page
if there is an
abnormality
5
Engine: Idling
Selector lever
position: N
Brake pedal
(Retest)
(1) Depressed
(2) Released
Data list No. 26
(1) ON
(2) OFF
Stop lamp
switch
26
Stop lamp switch
system (23-18)
A/C switch
(1) ON
(2) OFF
Data list No. 65
(1) ON
(2) OFF
Dual pressure
switch
-
Dual pressure
switch system
(23-37)
Idle position
switch
-
Idle position
switch system
(23-37)
Data list No. 21
Crank angle
(1) 550 - 850 rpm sensor
Gradually rises
from (1)
21
Crank angle
sensor system
(23-16)
Data list No. 57
(2) Data changes
Communication
with engineECU
<Vehicles
without TCL>
Communication
with TCL-ECU
<Vehicles with
TCL>
51
Serial
communication
system (23-25)
Should be no
abnormal shifting
shocks
Time lag should be
Malfunction
when starting
-
Engine stalling
during shifting
(23-30)
-
Shocks when
changing from N
to D and large
time lag (23-30)
-
Shocks when
changing from N
to R and large
time lag (23-31)
-
Shocks when
changing from N
to D,N to R and
large time lag
(23-32)
-
Does not move
forward (23-28)
-
Does not
reverse (23-29)
-
Does not move
(forward or
reverse) (23-29)
Data list No. 64
Accelerator pedal
(1) ON
(1) Released
(2) Half depressed (2) OFF
Selector lever
position
(1) N ® D
(2) N ® R
within 2 seconds
Driving
impossible
23-8
AUTOMATIC TRANSMISSION - Troubleshooting
No.
State prior to test
and operation
Test and operation
Judgement value
Check item
Diagnosis
code
No.
Inspection
procedure page
if there is an
abnormality
6
Selector lever
position: N
(Carry out on a
flat and straight
road.)
Selector lever
position and
vehicle speed
(1) Idling in
L range
(Vehicle
stopped)
(2) Driving at
constant speed
of
10 km/h in
L position
(3) Driving at
constant speed
of
30 km/h in
2 position
(4) Driving at
50 km/h in
3 position with
accelerator fully
closed
(5) Driving at
constant speed
of
50 km/h in
D position
(Each
condition
should be
maintained for
10 seconds or
more.)
Data list No. 63
(2) 1st, (4) 3rd, (3)
2nd, (5) 4th
Shift condition
-
-
Data list No. 31
(2) 0 %, (4) 100 %,
(3) 100 %, (5) 100
%
Low and reverse 31
solenoid valve
Low and reverse
solenoid valve
system (23-18)
Data list No. 32
(2) 0 %, (4) 0 %,
(3) 0 %, (5) 100 %
Underdrive
solenoid valve
32
Underdrive
solenoid valve
system (23-18)
Data list No. 33
(2)100 %, (4) 100
%, (3) 0 %, (5) 0 %
Second
solenoid valve
33
Second solenoid
valve system
(23-18)
Data list No. 34
(2) 100 %, (4) 0 %,
Overdrive
solenoid valve
34
Overdrive
solenoid valve
system (23-18)
Vehicle speed
sensor
-
Vehicle speed
sensor system
(23-38)
Data list No. 22
Input shaft
(4) 1,800 - 2,100 speed sensor
rpm
22
Input shaft speed
sensor system
(23-16)
Data list No. 23
Output shaft
(4) 1,800 - 2,100 speed sensor
rpm
23
Output shaft
speed sensor
system (23-17)
Selector lever
position and
vehicle speed
(1) Release the accelerator pedal
fully while driving at 50 km/h
in 3rd gear.
(2) Driving
at
constant speed
of 50 km/h in
3rd gear.
Data list No. 36
Damper clutch
control solenoid
(1) 0 %
(2) Approx. 70 - 90 valve
%
36
52
Damper clutch
control solenoid
valve system
(23-19)
7
Selector lever
position: 3
(Carry out on a
flat and straight
road.)
(3) 100 %, (5) 0 %
Data list No. 29
(1) 0 km/h
(4) 50 km/h
Data list No. 52
(1) Approx.
100 - 300 rpm
(2) Approx.
0 - 10 rpm
23-9
AUTOMATIC TRANSMISSION - Troubleshooting
No.
State prior to test
and operation
Test and operation
Judgement value
Check item
Diagnosis
code
No.
Inspection
procedure page
if there is an
abnormality
8
Use the MUT-II to
stop the INVECSII function.
Selector lever
position: D
(Carry out on a flat
and straight road.)
Monitor data list
No. 11, 23, and 63
with the MUT-II.
(1) Accelerate to
4th gear at a
throttle
position
sensor output
of 1.5V
(accelerator
opening angle
of 30 %).
(2) Gently
decelerate to a
standstill.
(3) Accelerate to
4th gear at a
throttle
position
sensor output
of 2.5 V
(accelerator
opening angle
of 50%).
(4) While driving at
60 km/h in 4th
gear,
shift
down to
3 range.
(5) While driving at
40 km/h in 3rd
gear,
shift
down to
2 range.
(6) While driving at
20 km/h in 2nd
gear,
shift
down to
L range.
For (1), (2) and (3),
the reading should
be the same as the
specified output
shaft speed and no
abnormal shocks
should occur.
For (4), (5) and (6),
downshifting
should occur
immediately
after the shifting
operation is made.
Malfunction
when shifting
-
Shocks and
running up
(23-32)
Displaced
shifting points
-
All points (23-33)
-
Some points
(23-34)
Does not shift
-
No diagnosis
code (23-34)
22
Input shaft
speed sensor
system (23-16)
23
Output shaft
speed sensor
system (23-17)
31
Low and reverse
solenoid valve
system (23-18)
33
Second
solenoid valve
system (23-18)
41
1st gear ratio is
not specified
(23-20)
42
2nd gear ratio is
not specified
(23-21)
33
Second
solenoid valve
system (23-18)
34
Overdrive
solenoid valve
system (23-18)
42
2nd gear ratio is
not specified
(23-21)
43
3rd gear ratio is
not specified
(23-22)
32
Underdrive
solenoid valve
system (23-18)
33
Second
solenoid valve
system (23-18)
43
3rd gear ratio is
not specified
(23-22)
44
4th gear ratio is
not specified
(23-23)
Does not shift
from 1 to 2 or 2
to 1
Does not shift
from 2 to 3 or 3
to 2
Does not shift
from 3 to 4 or 4
to 3
23-10
AUTOMATIC TRANSMISSION - Troubleshooting
No.
State prior to test
and operation
Test and operation
Judgement value
Check item
Diagnosis
code
No.
Inspection
procedure page
if there is an
abnormality
9
Selector lever
position: N
(Carry out on a
flat and straight
road.)
Monitor data list
No. 22
and No. 23 with the
MUT-II.
II
(1) Move selector
lever to
R range, drive
at constant
speed of
10 km/h.
The ratio between
data list No. 22 and
No. 23 should be
the same as the
gear ratio when
reversing.
Does not shift
22
Input shaft
speed sensor
system (23-16)
23
Output shaft
speed sensor
system (23-17)
46
Reverse gear
ratio is not
specified (23-24)
SHIFT PATTERN
<4G63 engine>
UPSHIFT PATTERN
Throttle opening %
Thick line: Standard shift pattern
100
1
2
2
3
3
4
50
2®3
movement
range
0
0
1,000
2,000
3®4
movement
range
3,000
4,000
5,000
6,000
7,000
Output shaft speed r/min
0
50
100
Vehicle speed km/h
150
200
23-11
AUTOMATIC TRANSMISSION - Troubleshooting
DOWNSHIFT PATTERN
Throttle opening %
Thick line: Standard shift pattern
100
1
2
1
2
1,000
2,000
0
4
3 (L,2)
3
4
(L,2,3)
3¬4
movement
range
2¬3
movement
range
0
3
2
2 (L)
50
0
3
50
3,000
4,000
5,000
Output shaft speed r/min
100
6,000
7,000
150
200
Vehicle speed km/h
HOLD MODE PATTERN
Thick line: Standard shift pattern
Throttle opening %
100
2
3
3
3
4
4
50
1
0
2
0
2,000
0
50
4,000
Output shaft speed r/min
100
Vehicle speed km/h
6,000
150
8,000
200
23-12
AUTOMATIC TRANSMISSION - Troubleshooting
<6A13 engine>
UPSHIFT PATTERN
Throttle opening %
100
Thick line: Standard shift pattern
1
50
2
2
2®3
movement
range
0
0
1,000
0
2,000
50
3
3
4
3®4
movement
range
3,000
4,000
Output shaft speed r/min
5,000
100
Vehicle speed km/h
150
6,000
7,000
200
DOWNSHIFT PATTERN
Throttle opening %
100
Thick line: Standard shift pattern
1
1
2
2
2 (L)
3
3
2
4
3 (L,2)
3
4
(L,2,3)
50
2¬3
movement
range
0
0
0
3¬4
movement
range
1,000
2,000
50
3,000
4,000
Output shaft speed r/min
100
Vehicle speed km/h
5,000
150
6,000
7,000
200
23-13
AUTOMATIC TRANSMISSION - Troubleshooting
HOLD MODE PATTERN
Throttle opening %
Thick line: Standard shift pattern
100
2
3
3
3
4
4
50
1
0
2
0
0
2,000
50
4,000
Output shaft speed r/min
100
Vehicle speed km/h
6,000
150
8,000
200
23-14
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION CHART FOR DIAGNOSIS CODE
23100790243
Code
Diagnosis item
11
Short circuit
23-15
Open circuit
23-15
14
Throttle position sensor system
<Vehicles without TCL>
Accelerator pedal position sensor system
<Vehicles with TCL>
Sensor maladjustment
23-15
15
Oil temperature sensor system
Open circuit
23-15
21
Crank angle sensor system
Open circuit
23-16
22
Input shaft speed sensor system
Short circuit/open circuit
23-16
23
Output shaft speed sensor system
Short circuit/open circuit
23-17
25
Wide open throttle switch system
Short circuit
23-17
26
Stop lamp switch system
Short circuit/open circuit
23-18
31
Low and reverse solenoid valve system
Short circuit/open circuit
23-18
32
Underdrive solenoid valve system
Short circuit/open circuit
23-18
33
Second solenoid valve system
Short circuit/open circuit
23-18
34
Overdrive solenoid valve system
Short circuit/open circuit
23-18
36
Damper control clutch solenoid valve system
Short circuit/open circuit
23-19
41
1st gear ratio does not meet the specification
23-20
42
2st gear ratio does not meet the specification
23-21
43
3rd gear ratio does not meet the specification
23-22
44
4th gear ratio does not meet the specification
23-23
46
Reverse gear ratio does not meet the specification
23-24
51
Abnormal communication with engine-ECU <Vehicles without TCL>
Abnormal communication with TCL-ECU <Vehicles with TCL>
23-25
52
Damper control clutch solenoid valve system
Defective system
23-19
54
A/T Control relay system
Short circuit to earth/
open circuit
23-25
56
N range lamp system
Short circuit to earth
23-26
71
Malfunction of A/T-ECU
12
Reference page
23-26
AUTOMATIC TRANSMISSION - Troubleshooting
23-15
INSPECTION PROCEDURES FOR DIAGNOSIS CODES
Code No. 11, 12, 14 Throttle position sensor system
<Vehicles without TCL>, accelerator pedal position
sensor <Vehicles with TCL>
Probable cause
If the TPS or APS output voltage is 4.8 V or higher when the engine is idling, the
output is judged to be too high and diagnosis code No. 11 is output. Code No. 11
is also output if there is a problem with the APS and an APS fail-safe signal is received
from the TCL-ECU. If the TPS or APS output voltage is 0.2 V or lower at times
other than when the engine is idling, the output is judged to be too low and diagnosis
code No. 12 is output. If the TPS or APS output voltage is 0.2 V or lower or if it
is 1.2 V or higher when the engine is idling, the TPS or APS adjustment is judged
to be incorrect and diagnosis code No. 14 is output.
D
Throttle position sensor check <Vehicles without TCL>
(Refer to GROUP 13A - On-vehicle Service.)
Accelerator pedal position sensor check<Vehicles with TCL>
(Refer to GROUP 13H - On-vehicle Service.)
NG
D
D
D
Malfunction of the throttle position sensor <Vehicles
without TCL>
Malfunction of the accelerator pedal position sensor
<Vehicles with TCL>
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the following connectors:
B-07 <Vehicles without TCL>, B-41 <Vehicles with TCL>, C-29
NG
Repair
OK
Harness check
D Between throttle position sensor and A/T-ECU
<Vehicles without TCL>
D Between accelerator pedal position sensor and A/T-ECU
<Vehicles with TCL>
OK
Check the trouble symptoms.
NG
NG
Repair
Replace the A/T-ECU.
Code No. 15 Oil temperature sensor system
Probale cause
If the oil temperature sensor output voltage is 2.6 V or more even after driving for
10 minutes or more (if the oil temperature does not increase), it is judged that there
is an open circuit in the oil temperature sensor and diagnosis code No. 15 is output.
D
D
D
Oil temperature sensor check (Refer to P.23-52.)
NG
Malfunction of the oil temperature sensor
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the follwing connectors: B-70, C-29
NG
Repair
OK
Harness check
D Between oil temperature sensor and A/T-ECU
OK
Check the trouble symptoms.
NG
NG
Repair
Replace the A/T-ECU.
23-16
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 21 Crank angle sensor system
Probable cause
If no output pulse is detected from the crank angle sensor for 5 seconds or more
while driving at 25 km/h or more, it is judged that there is an open circuit in the
crank angle sensor and diagnosis code No. 21 is output.
D
D
D
Check the follwing connectors: B-77, C-29
NG
Malfunction of the crank angle sensor
Malfunction of connector
Malfunction of the A/T-ECU
Repair
OK
Harness check
D Between crank angle sensor and A/T-ECU
NG
Repair
OK
Crank angle sensor system check
(Refer to GROUP 13A - Troubleshooting.)
OK
NG
Check the trouble symptoms.
Replace the A/T-ECU.
Code No. 22 Input shaft speed sensor system
Probable cause
If no output pulse is detected from the input shaft speed sensor for 1 second or
more while driving in 3rd or 4th gear at a speed of 30 km/h or more, there is judged
to be an open circuit or short-circuit in the input shaft speed sensor and diagnosis
code No. 22 is output. If diagnosis code No. 22 is output four times, the transmission
is locked into 3rd gear (D range) or 2nd gear as a fail-safe measure, and the N
range lamp flashes at a frequency of 1 Hz.
D
D
D
D
Malfunction
Malfunction
Malfunction
Malfunction
of
of
of
of
the input shaft speed sensor
the underdrive clutch retainer
connector
A/T-ECU
L: Refer to the Transmission Workshop Manual.
Measure at the input shaft speed sensor
connector B-71.
D Disconnect the connector and
measure at the harness side.
(1) Voltage between 3 and earth
(Ignition switch: ON)
OK: Battery voltage
(2) Voltage between 2 and earth
(Ignition switch: ON)
OK approx. 5 V
(3) Continuity between 1 and earth
OK: Continuity
NG
OK
Check the following harness:
D Between the input shaft speed
sensor and the ignition switch
D Between the input shaft speed
sensor and A/T-ECU
OK
Check the trouble symptoms.
OK
Measure output waveform of the input
shaft speed sensor.
(using an oscilloscope)
D Engine: 2,000 r/min (approx. 50
km/h)
D Transmission: 3rd gear (Voltage)
OK: Conforms to the waveform
shown at page 23-45 (Inspection procedure using an oscilloscope). There is no noise
in the output waveform.
OK
Check the trouble symptoms.
Check the following connectors:
B-71, C-29
NG
NG
NG
NG
Repair
Repair
Replace the A/T-ECU.
Replace the input shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul K
D Replace the
retainer.
underdrive
clutch
Check the trouble symptoms.
NG
NG
Replace the A/T-ECU.
Eliminate the cause of the noise.
23-17
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 23 Output shaft speed sensor system
Probable cause
If the output from the output shaft speed sensor is continuously 50% lower than the
vehicle speed for 1 second or more while driving in 3rd or 4th gear at a speed of
30 km/h or more, there is judged to be an open circuit or short-circuit in the output
shaft speed sensor and diagnosis code No. 23 is output.
If diagnosis code No. 23 is output four times, the transmission is locked into 3rd
gear (D range) or 2nd gear as a fail-safe measure, and the N range lamp flashes
at a frequency of 1 Hz.
D
D
D
D
Malfunction
Malfunction
Malfunction
Malfunction
of
of
of
of
the output shaft speed sensor
the transfer drive gear or driven gear
connector
the A/T-ECU
L: Refer to the Transmission Workshop Manual.
Measure at the output shaft speed sensor connector B-68.
D Disconnect the connector and
measure at the harness side.
(1) Voltage between 3 and earth
(Ignition switch: ON)
OK: Battery voltage
(2) Voltage between 2 and earth
(Ignition switch: ON)
OK: approx. 5 V
(3) Continuity between 1 and earth
OK: Continuity
NG
OK
Check the following harness:
D Between the output shaft speed
sensor and the ignition switch
D Between the output shaft speed
sensor and A/T-ECU
OK
OK
NG
NG
Repair
Repair
Replace the A/T-ECU.
Replace the output shaft speed sensor.
NG
Check the trouble symptoms.
A/T overhaul L
D Replace the transfer drive gear and
driven gear.
Check the trouble symptoms.
NG
Eliminate the cause of the noise.
NG
Check the trouble symptoms.
NG
NG
Check the trouble symptoms.
OK
Measure output waveform of the output
shaft speed sensor.
(using an oscilloscope)
D Engine: 2,000 r/min
(approx. 50 km/h)
D Transmission: 3rd gear
(Voltage)
OK: Conforms to the waveform
shown at page 23-45 (Inspection procedure using an oscilloscope). There is no noise
in the output waveform.
Check the following connectors:
B-68, C-29
Replace the A/T-ECU.
Code No. 25 Wide open throttle switch system
Probable cause
If the wide open throttle switch is on for 1 second or more with the throttle valve
opening angle at 70% or less, it is judged that there is a short circuit in the wide
open throttle switch and diagnosis code No. 25 is output.
D
D
D
Wide open throttle switch check (Refer to P.23-64).
NG
Malfunction of the wide open throttle switch
Malfunction of connector
Malfunction of A/T-ECU
Replace
OK
Check the following connectors: C-18, C-30, C-83
NG
Repair
OK
Harness check
D Between the wide open throttle switch and the A/T-ECU.
OK
Check the trouble symptoms.
NG
NG
Repair
Replace the A/T-ECU.
23-18
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 26 Stop lamp switch system
Probable cause
If the stop lamp switch is on for 5 minutes or more while driving, it is judged that
there is a short circuit in the stop lamp switch and diagnosis code No. 26 is output.
D
D
D
Stop lamp switch check (Refer to GROUP 35 - Brake Pedal.)
NG
Malfunction of the stop lamp switch
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the following connectors: C-02, C-30, C-65, C-83
NG
Repair
OK
Harness check
D Between stop lamp switch and A/T-ECU
OK
Check the trouble symptoms.
NG
NG
Repair
Replace the A/T-ECU.
Probable cause
Code No. 31 Low and reverse solenoid valve system
Code No. 32 Underdrive solenoid valve system
Code No. 33 Second solenoid valve system
Code No. 34 Overdrive solenoid valve system
If the resistance value for a solenoid valve is too large or too small, it is judged
that there is a short-circuit or an open circuit in the solenoid valve and the respective
diagnosis code is output. The transmission is locked into 3rd gear as a fail-safe measure,
and the N range lamp flashes at a frequency of 1 Hz.
Solenoid valve check (Refer to P.23-54.)
NG
D
D
D
Malfunction of solenoid valve
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the following connectors: B-70, C-28, C-30, C-41
NG
Repair
OK
Harness check
D Between solenoid valve and A/T-ECU
NG
Repair
OK
Replace the solenoid valve.
Check the trouble symptoms.
NG
Replace the A/T-ECU.
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 36, 52 Damper clutch control solenoid valve
system
Probable cause
If the resistance value for the damper clutch control solenoid valve is too large or
too small, it is judged that there is a short-circuit or an open circuit in the damper
clutch control solenoid valve and diagnosis code No. 36 is output. If the drive duty
rate for the damper clutch control solenoid valve is 100 % for a continuous period
of 4 seconds or more, it is judged that there is an abnormality in the damper clutch
control system and diagnosis code No. 52 is output. When diagnosis code No. 36
is output, the transmission is locked into 3rd gear as a fail-safe measure, and the
N range lamp flashes at a frequency of 1 Hz.
D
D
D
Damper clutch control solenoid valve check (Refer to P.23-54.)
NG
Malfunction of the damper clutch control solenoid valve
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the following connectors: B-70, C-28, C-41
NG
Repair
OK
Harness check
D Between damper clutch control solenoid valve and A/T-ECU
NG
Repair
OK
Replace the damper clutch control solenoid valve.
Check the trouble symptoms.
NG
23-19
Replace the A/T-ECU.
23-20
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 41 1st gear ratio does not meet the specification
Probable cause
If the output from the output shaft speed sensor multiplied by the 1st gear ratio is
not the same as the output from the input shaft speed sensor after shifting to 1st
gear has been completed, diagnosis code No. 41 is output. If diagnosis code No.
41 is output four times, the transmission is locked into 3rd gear as a fail-safe measure,
and the N range lamp flashes at a frequency of 1 Hz.
D
D
D
D
D
D
D
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Noise generated
input shaft speed sensor
output shaft speed sensor
underdrive clutch retainer
transfer drive gear or driven gear
low and reverse brake system
underdrive clutch system
L: Refer to the Transmission Workshop Manual.
MUT-II Self-Diag code
Is the diagnosis code No. 22 output?
No
MUT-II Self-Diag code
Is the diagnosis code No. 23 output?
No
Measure output waveform from the input shaft speed sensor. (using
an oscilloscope)
D Connect the connector B-71 and measure voltage between
31 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
Yes
Yes
NG
Code No. 22 Input shaft speed sensor system check
(Refer to P.23-16.)
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-17.)
Replace the input shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the underdrive clutch retainer.
Check the trouble symptoms.
OK
NG
Eliminate the cause of the noise.
Measure output waveform from the output shaft speed sensor.
(using an oscilloscope)
D Connect the connector B-68 and measure voltage between
32 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
OK
A/T overhaul L
D Underdrive clutch system check
(No. 42, No. 43, or no diagnosis code is output).
D Low and reverse brake system check
(No. 46 or no diagnosis code is output).
NG
Replace the output shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the transfer drive gear and driven gear.
Check the trouble symptoms.
NG
Eliminate the cause of the noise.
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 42 2nd gear ratio does not meet the specification
Probable cause
If the output from the output shaft speed sensor multiplied by the 2nd gear ratio
is not the same as the output from the input shaft speed sensor after shifting to
2nd gear has been completed, diagnosis code No. 42 is output. If diagnosis code
No. 42 is output four times, the transmission is locked into 3rd gear as a fail-safe
measure, and the N range lamp flashes at a frequency of 1 Hz.
D
D
D
D
D
D
D
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Noise generated
23-21
input shaft speed sensor
output shaft speed sensor
underdrive clutch retainer
transfer drive gear or driven gear
second brake system
underdrive clutch system
L: Refer to the Transmission Workshop Manual.
MUT-II Self-Diag code
Is the diagnosis code No. 22 output?
No
MUT-II Self-Diag code
Is the diagnosis code No. 23 output?
No
Measure output waveform from the input shaft speed sensor. (using
an oscilloscope)
D Connect the connector B-71 and measure voltage between
31 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
Yes
Yes
NG
Code No. 22 Input shaft speed sensor system check
(Refer to P.23-16.)
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-17.)
Replace the input shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the underdrive clutch retainer.
Check the trouble symptoms.
OK
NG
Eliminate the cause of the noise.
Measure output waveform from the output shaft speed sensor.
(using an oscilloscope)
D Connect the connector B-68 and measure voltage between
32 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
OK
A/T overhaul L
D Underdrive clutch system check
(No. 41, No. 43, or no diagnosis code is output).
D Second brake system check
(No. 44 or no diagnosis code is output).
NG
Replace the output shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the transfer drive gear and driven gear.
Check the trouble symptoms.
NG
Eliminate the cause of the noise.
23-22
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 43 3rd gear ratio does not meet the specification
Probable cause
If the output from the output shaft speed sensor multiplied by the 3rd gear ratio is
not the same as the output from the input shaft speed sensor after shifting to 3rd
gear has been completed, diagnosis code No. 43 is output. If diagnosis code No.
43 is output four times, the transmission is locked into 3rd gear as a fail-safe measure,
and the N range lamp flashes at a frequency of 1 Hz.
D
D
D
D
D
D
D
Malfunction of the
Malfunction of the
Malfunction of the
Malfunciton of the
Malfunction of the
Malfunction of the
Noise generated
input shaft speed sensor
output shaft speed sensor
underdrive clutch retainer
transfer drive gear or driven gear
underdrive clutch system
overdrive clutch system
L: Refer to the Transmission Workshop Manual.
MUT-II Self-Diag code
Is the diagnosis code No. 22 output?
No
MUT-II Self-Diag code
Is the diagnosis code No. 23 output?
No
Measure output waveform from the input shaft speed sensor. (using
an oscilloscope)
D Connect the connector B-71 and measure voltage between
31 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
Yes
Yes
NG
Code No. 22 Input shaft speed sensor system check
(Refer to P.23-16.)
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-17.)
Replace the input shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the underdrive clutch retainer.
Check the trouble symptoms.
OK
NG
Eliminate the cause of the noise.
Measure output waveform from the output shaft speed sensor.
(using an oscilloscope)
D Connect the connector B-68 and measure voltage between
32 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
OK
A/T overhaul L
D Underdrive clutch system check
(No. 41, No. 42, or no diagnosis code is output).
D Overdrive clutch system check
(No. 44 or no diagnosis code is output).
NG
Replace the output shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the transfer drive gear and driven gear.
Check the trouble symptoms.
NG
Eliminate the cause of the noise.
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 44 4th gear ratio does not meet the specification
Probable cause
If the output from the output shaft speed sensor multiplied by the 4th gear ratio is
not the same as the output from the input shaft speed sensor after shifting to 4th
gear has been completed, diagnosis code No. 44 is output. If diagnosis code No.
44 is output four times, the transmission is locked into 3rd gear as a fail-safe measure,
and the N range lamp flashes at a frequency of 1 Hz.
D
D
D
D
D
D
D
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Malfunction of the
Noise generated
23-23
input shaft speed sensor
output shaft speed sensor
underdrive clutch retainer
transfer drive gear or driven gear
second brake system
overdrive clutch system
L: Refer to the Transmission Workshop Manual.
MUT-II Self-Diag code
Is the diagnosis code No. 22 output?
No
MUT-II Self-Diag code
Is the diagnosis code No. 23 output?
No
Measure output waveform from the input shaft speed sensor. (using
an oscilloscope)
D Connect the connector B-71 and measure voltage between
31 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flashing between 0 ¨ 5V) and there is no noise appearing in
the waveform.
Yes
Yes
NG
Code No. 22 Input shaft speed sensor system check
(Refer to P.23-16.)
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-17.)
Replace the input shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the underdrive clutch retainer.
Check the trouble symptoms.
OK
NG
Eliminate the cause of the noise.
Measure output waveform from the output shaft speed sensor.
(using an oscilloscope)
D Connect the connector B-68 and measure voltage between
32 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
OK
A/T overhaul L
D Second brake system check
(No. 42 or no diagnosis code is output).
D Overdrive clutch system check
(No. 43 or no diagnosis code is output).
NG
Replace the output shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the transfer drive gear and driven gear.
Check the trouble symptoms.
NG
Eliminate the cause of the noise.
23-24
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 46 Reverse gear ratio
specification
does not meet the
If the output from the output shaft speed sensor multiplied by the reverse gear ratio
is not the same as the output from the input shaft speed sensor after shifting to
reverse gear has been completed, diagnosis code No. 46 is output. If diagnosis code
No. 46 is output four times, the transmission is locked into 3rd gear as a fail-safe
measure, and the N range lamp flashes at a frequency of 1 Hz.
Probable cause
D
D
D
D
D
D
D
Malfunction of the
Malfunction of the
Malfunction of the
Malfunciton of the
Malfunction of the
Malfunction of the
Noise generated
input shaft speed sensor
output shaft speed sensor
underdrive clutch retainer
transfer drive gear or driven gear
low and reverse brake system
reverse clutch system
L: Refer to the Transmission Workshop Manual.
MUT-II Self-Diag code
Is the diagnosis code No. 22 output?
No
MUT-II Self-Diag code
Is the diagnosis code No. 23 output?
No
Measure output waveform from the input shaft speed sensor. (using
an oscilloscope)
D Connect the connector B-71 and measure voltage between
31 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
Yes
Yes
NG
Code No. 22 Input shaft speed sensor system check
(Refer to P.23-16.)
Code No. 23 Output shaft speed sensor system check
(Refer to P.23-17.)
Replace the input shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the underdrive clutch retainer.
Check the trouble symptoms.
OK
NG
Eliminate the cause of the noise.
Measure output waveform from the output shaft speed sensor.
(using an oscilloscope)
D Connect the connector B-68 and measure voltage between
32 and 43 at the A/T-ECU.
D Engine: 2,000 r/min (approx. 50 km/h)
D Selector lever position: 3
(Voltage)
OK: A waveform such as the one shown on P.23-45 (Inspection
Procedure Using an Oscilloscope) is output (flalshing
between 0 ¨ 5V) and there is no noise appearing
in the waveform.
OK
A/T overhaul L
D Low and reverse brake system check
(No. 41 or no diagnosis code is output).
D Reverse clutch system check (No diagnosis code is output).
NG
Replace the output shaft speed sensor.
Check the trouble symptoms.
NG
A/T overhaul L
D Replace the transfer drive gear and driven gear.
Check the trouble symptoms.
NG
Eliminate the cause of the noise.
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 51 Abnormal communication with engine-ECU
<Vehicles without TCL>
Abnormal communication with TCL-ECU
<Vehicles with TCL>
Probable cause
If normal communication is not possible for a continuous period of 1 second or more
when the ignition switch is at the ON position, the battery voltage is 10 V or more
and the engine speed is 450 r/min or more, diagnosis code No. 51 is output. Diagnosis
code No. 51 is also output if the data being received is abnormal for a continuous
period of 4 seconds under the same conditions.
D
D
D
D
Check the following connectors:
D C-30, C-34, C-38
<4G6-vehicles without TCL>
D C-30, C-37
<6A1-vehicles without TCL>
D C-10, C-30, C-51
<Vehicles with TCL>
OK
Harness check
D Between engine-ECU and A/T-ECU
<Vehicles without TCL>
D Between TCL-ECU and A/T-ECU
<Vehicles with TCL>
NG
NG
Malfunction of connector
Malfunction of the engine-ECU <Vehicles without TCL>
Malfunction of the TCL-ECU <Vehicles with TCL>
Malfunction of the A/T-ECU
Repair
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
<Vehicles without TCL>
Replace the TCL-ECU.
<Vehicles with TCL>
NG
Check the trouble symptoms.
Replace the A/T-ECU.
Code No. 54 A/T control relay system
Probable cause
If the A/T control relay voltage is less than 7 V after the ignition switch has been
turned ON, it is judged that there is an open circuit or a short-circuit in the A/T control
relay earth and diagnosis code No. 54 is output.
Then the transmission is locked into 3rd gear as a fail-safe measure, and the N
range lamp flashes at a frequency of 1 Hz.
D
D
D
Check the A/T control relay. (Refer to P.23-53.)
NG
Malfunction of the A/T control relay
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the following connectors: B-30, C-28, C-30, C-41, C-45
NG
Repair
OK
Harness check
D Between control relay and body earth
D Between control relay and battery
D Between control relay and A/T-ECU
OK
Check the trouble symptoms.
NG
NG
23-25
Repair
Replace the A/T-ECU.
23-26
AUTOMATIC TRANSMISSION - Troubleshooting
Code No. 56 N range lamp system
Probable cause
If the N range signal is off after an N range lamp illumination instruction (ON instruction)
has been given, it is judged that there is a short-circuit in the N range lamp earth
and diagnosis code No. 56 is output.
D
D
D
Check the N range lamp bulb
(Refer to GROUP 52A - Instrument Panel.)
NG
Malfunction of the N range lamp bulb
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
Check the following connectors: C-30, C-90, D-02
NG
Repair
OK
Harness check
D Between N range lamp bulb and A/T-ECU
OK
Check the trouble symptoms.
NG
NG
Repair
Replace the A/T-ECU.
Code No. 71 Malfunction of A/T-ECU
Probale cause
There is an abnormality in the A/T-ECU. The transmission is locked into 3rd gear
as a fail-safe measure.
D
Malfunction of the A/T-ECU
Replace the A/T-ECU.
INSPECTION CHART FOR TROUBLE SYMPTOMS
23100800267
Trouble symptom
Inspection
procedure No.
Reference
page
Communication with MUT-II is not possible
1
23-27
Driving impossible
Starting impossible
2
23-28
Does not move forward
3
23-28
Does not reverse
4
23-29
Does not move (forward or reverse)
5
23-29
Engine stalling when shifting
6
23-30
Shocks when changing from N to D and large time lag
7
23-30
Shocks when changing from N to R and large time lag
8
23-31
Shocks when changing from N to D, N to R and large
time lag
9
23-32
Shocks and running up
10
23-32
Malfunction when starting
Malfunction when shifting
23-27
AUTOMATIC TRANSMISSION - Troubleshooting
Trouble symptom
Inspection
procedure No.
Reference
page
All points
11
23-33
Some points
12
23-34
Does not shift
No diagnosis codes
13
23-34
Malfunction while driving
Poor acceleration
14
23-35
Vibration
15
23-35
Inhibitor switch system
16
23-36
Mode control switch system
17
23-36
Idle position switch system
18
23-37
Dual pressure switch system
19
23-37
Vehicle speed sensor system
20
23-38
Auto-cruse-ECU signal system
21
23-38
Displaced shifting points
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-II is not possible
Probable cause
If communication with the MUT-II is not possible, the cause is probably a defective
diagnosis line or the A/T-ECU is not functioning.
D
D
D
Is communication with other systems
possible using the MUT-II?
Yes
Check the continuity and voltage of the
A/T-ECU connector.
D Disconnect the connector C-28 and
check at harness side.
D Voltage between terminals No. 11,
24 and earth
OK: Battery voltage
D Voltage between C-28 terminals
Nos.12, 13, 25, 26, C-30 terminal
No. 72 and earth
OK: Continuity
OK
No
Harness check
D Between diagnosis connector and
A/T-ECU
OK
Check the trouble symptoms.
Check the diagnosis line with MUT-II,
and repair if necessary.
NG
Check the following connectors:
C-28, C-30, C-45, C-83, C-131, C-134
OK
Harness check
power
supply
and
D Between
A/T-ECU
D Between earth and A/T-ECU
OK
Check the trouble symptoms.
NG
Check the following connectors:
C-20, C-28, C-30, C-49, C-66, C-83
OK
Malfunction of diagnosis line
Malfunction of connector
Malfunction of the A/T-ECU
NG
NG
NG
Repair
Repalce the A/T-ECU.
Repair
Replace the A/T-ECU.
NG
NG
Repair
Repair
23-28
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 2
Starting impossible
Probable cause
Starting is not possible when the selector lever is in P or N range.In such cases,
the cause is probably a defective engine system, torque converter or oil pump.
D
D
D
Malfunction of the engine system
Malfunction of the torque converter
Malfunction of the oil pump
L: Refer to the Transmission Workshop Manual.
Check the engine system.
D Control system, ignition system, fuel system, main engine
system
OK
Torque converter check
D Check for incorrect installation (inserted at an angle, etc.) and
for damaged splines.
NG
NG
Repair, replace
Repair if possible. If the splines are damaged and repairs are not
possible, replace the torque converter assembly.
OK
Repalce the oil pump assembly. L
(The oil pump cannot be disassembled.)
INSPECTION PROCEDURE 3
Does not move (forward)
Probable cause
If the vehicle does not move forward when the selector lever is shifted from N to
D, 3, 2 or L range while the engine is idling, the cause is probably abnormal line
pressure or a malfunction of the underdrive clutch or valve body.
D
D
D
D
Abnormal line
Malfunction of
Malfunction of
Malfunction of
pressure
the underdrive solenoid valve
the underdrive clutch
the valve body
L: Refer to the Transmission Workshop Manual.
MUT-II Actuator test
D No. 2 Underdrive solenoid valve
OK: Sound of operation can be heard.
OK
Hydraulic pressure test (Refer to P.23-56.)
D Measure the hydraulic pressure for each element when in L
range.
Standard value: Refer to P.23-57.
NG
NG
OK
OK
Underdrive clutch system check L
D Remove the transmission assembly, valve body cover and valve
body.
NG
D Pistons should operate and pressure should be maintained
when air is blown through the underdrive clutch oil hole in the
transmission case.
Replace the solenoid valve. L
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
Underdrive clutch check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
AUTOMATIC TRANSMISSION - Troubleshooting
23-29
INSPECTION PROCEDURE 4
Does not reverse
Probable cause
If the vehicle does not reverse when the selector lever is shifted from N to R range
while the engine is idling, the cause is probably abnormal pressure in the reverse
clutch or low and reverse brake or a malfunction of the reverse clutch, low and reverse
brake or valve body.
D
D
D
D
D
D
Abnormal reverse clutch pressure
Abnormal low and reverse brake pressure
Malfunction of the low and reverse solenoid valve
Malfunction of the reverse clutch
Malfunction of the low and reverse brake
Malfunction of the valve body
L: Refer to the Transmission Workshop Manual.
MUT-II Actuator test
D No. 1 Low and reverse solenoid valve
OK: Sound of operation can be heard.
OK
Hydraulic pressure check (Refer to P.23-56.)
D Measure the reverse clutch pressure in R range.
Standard value: Refer to P.23-57.
OK
Hydraulic pressure check (Refer to P.23-56.)
D Measure the low and reverse brake pressure in R range.
Standard value: Refer to P.23-57.
NG
Replace the low and reverse solenoid valve. L
NG
NG
OK
Reverse clutch system and low and reverse brake system check OK
L
D Remove the transmission assembly, valve body cover and valve
body.
D Pistons should operate and pressure should be maintained NG
when air is blown through the reverse clutch oil hole and the
low reverse brake oil hole in the transmission case.
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
Reverse clutch and low and reverse brake check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
INSPECTION PROCEDURE 5
Does not move (forward or reverse)
Probable cause
If the vehicle does not move forward or reverse when the selector lever is shifted
to any position while the engine is idling, the cause is probably abnormal line pressure,
or a malfunction of the power train, oil pump or valve body.
D
D
D
D
Abnormal line
Malfunction of
Malfunction of
Malfunction of
pressure
power train
the oil pump
the valve body
L: Refer to the Transmission Workshop Manual.
Hydraulic pressure check (Refer to P.23-56.)
D Measure the hydraulic pressure for each element when moving
forward and back.
Standard value: Refer to P.23-57.
NG
Replace the oil pump assembly. L
(The oil pump cannot be disassembled.)
OK
NG
Power train check L
D Disassemble the transmission, check the condition of the
planetary carrier, output shaft and differential, etc.
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
23-30
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 6
Engine stalling when shifting
Probable cause
If the engine stalls when the selector lever is shifted from N to D or R range while
the engine is idling, the cause is probably a malfunction of the engine system, damper
clutch solenoid valve, valve body or torque converter (damper clutch malfunction).
D
D
D
D
Malfunction of the engine system
Malfunction of the damper clutch control solenoid valve
Malfunction of the valve body
Malfunction of the torque converter (Malfuction of the
damper clutch)
L: Refer to the Transmission Workshop Manual.
Engine system check
D Check the control system, ignition system, fuel system and
main system.
NG
Repair, replace
OK
Replace the damper clutch control solenoid valve.
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
NG
Repalce the torque converter.
INSPECTION PROCEDURE 7
Shocks when changing from N to D and large time lag
Probable cause
If abnormal shocks or a time lag of 2 seconds or more occur when the selector
lever is shifted from N to D range while the engine is idling, the cause is probably
abnormal underdrive clutch pressure or a malfunction of the underdrive clutch, valve
body or idle position switch.
D
D
D
D
D
Abnormal underdrive clutch pressure
Malfunction of the underdrive solenoid valve
Malfunction of the underdrive clutch
Malfunction of the valve body
Malfunction of the idle position switch
L: Refer to the Transmission Workshop Manual.
MUT-II Actuator test
D No. 2 Underdrive solenoid valve
OK: Sound of operation can be heard.
OK
NG
Replace the underdrive solenoid valve. L
When starting
Shocks sometimes occur
When does the shock occur?
No
When shifting
Hydraulic pressure test (Refer to P.23-56.)
D Measure the underdrive clutch pressure when shifting from
N to D.
Standard value: Refer to P.23-57.
NG
Underdrive clutch system check L
D Remove the transmission assembly, valve body cover and valve
body.
D Pistons should operate and pressure should be maintained
when air is blown through the underdrive clutch oil hole in the
transmission case.
NG
Underdrive clutch check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
MUT-II Data list
D No. 64 Idle position switch
OK: Turns from on to off when the accelerator pedal is slightly
depressed from the fully closed position.
OK
OK
OK
Yes
NG
Idle position switch check
D INSPECTION PROCEDURE 18 - Idle position switch system
check (Refer to P.23-37.)
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
AUTOMATIC TRANSMISSION - Troubleshooting
23-31
INSPECTION PROCEDURE 8
Shocks when changing from N to R and large time lag
Probable cause
If abnormal shocks or a time lag of 2 seconds or more occurs when the selector
lever is shifted from N to R range while the engine is idling, the cause is probably
abnormal reverse clutch pressure or low and reverse brake pressure, or a malfunction
of the reverse clutch, low and reverse brake, valve body or idle position switch.
D
D
D
D
D
D
D
Abnormal reverse clutch pressure
Abnormal low and reverse brake pressure
Malfunction of the low and reverse solenoid valve
Malfunction of the reverse clutch
Malfunction of the low and reverse brake
Malfunction of the valve body
Malfunction of the idle position switch
L: Refer to the Transmission Workshop Manual.
MUT-II Actuator test
D No. 1 Low and reverse solenoid valve
OK: Sound of operation can be heard.
OK
NG
Replace the low and reverse solenoid valve. L
When starting
Shocks sometimes occur
When does the shock occur?
No
When shifting
Hydraulic pressure test (Refer to P.23-56.)
D Measure the reverse clutch pressure in R range.
Standard value: Refer to P.23-57.
NG
OK
Hydraulic pressure test (Refer to P.23-56.)
D Measure the low and reverse brake pressure in R range.
Standard value: Refer to P.23-57.
OK
Reverse clutch system and low reverse brake system check L
D Remove the transmission assembly, valve body cover and valve
body.
D Pistons should operate and pressure should be maintained
when air is blown through the reverse clutch oil hole and low
and reverse brake oil hole in the transmission case.
NG
Reverse clutch and low reverse brake check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
MUT-II Data list
D No. 64 Idle position switch
OK: Turns from on to off when the accelerator pedal is slightly
depressed from the fully closed position.
OK
NG
OK
Yes
NG
Idle position switch check
D INSPECTION PROCEDURE 18 - Idle position switch system
check (Refer to P.23-37.)
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
23-32
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 9
Shocks when changing from N to D, N to R and large time
lag
Probable cause
If abnormal shocks or a time lag of 2 seconds or more occur when the selector
lever is shifted from N to D range and from N to R range while the engine is idling,
the cause is probably abnormal line pressure or a malfunction of the oil pump or
valve body.
D
D
D
Abnormal line pressure
Malfunction of the oil pump
Malfunction of the valve body
L: Refer to the Transmission Workshop Manual.
Hydraulic pressure test (Refer to P.23-56.)
D Measure the hydraulic pressure for each element when in D
range and R range.
Standard value: Refer to P.23-57.
OK
When does the shock occur?
NG
Adjust the line pressure. (Refer to P.23-62.)
NG
When
starting
When shifting
Replace the oil pump assembly. L
(The oil pump cannot be disassembled.)
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
INSPECTION PROCEDURE 10
Shocks and running up
Probable cause
If shocks occur when driving due to upshifting or downshifting and the transmission
speed becomes higher than the engine speed, the cause is probably abnormal line
pressure or a malfunction of a solenoid valve, oil pump, valve body or of a brake
or clutch.
D
D
D
D
D
Abnormal line
Malfunction of
Malfunction of
Malfunction of
Malfunction of
pressure
each solenoid valve
the oil pump
the valve body
each brake or each clutch
L: Refer to the Transmission Workshop Manual.
MUT-II Actuator test
D No. 1 Low and reverse solenoid valve
D No. 2 Underdrive solenoid valve
D No. 3 Second solenoid valve
D No. 4 Overdrive solenoid valve
OK: Sound of operation can be heard.
OK
Adjust the line pressure. (Refer to P.23-62.)
OK
Clutch and brake check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
NG
NG
Replace the solenoid valve.
Replace the oil pump assembly. L
(The oil pump cannot be disassembled.)
NG
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
23-33
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 11
All points (Displaced shifting points)
Probable cause
If all shift points are displaced while driving, the cause is probably a malfunction
of the output shaft speed sensor, TPS or of a solenoid valve.
D
D
D
D
D
D
Malfunction of
Malfunction of
Malfunction of
Abnormal line
Malfunction of
Malfunction of
the output shaft speed sensor
the throttle position sensor
each solenoid valve
pressure
the valve body
the A/T-ECU
L: Refer to the Transmission Workshop Manual.
MUT-II Data list
D No. 23 Output shaft speed sensor
OK: Increases in proportion to vehicle speed.
OK
MUT-II Data list
D No. 11 TPS/APS
OK: Increases in proportion to accelerator pedal opening angle
OK
MUT-II Data list
D No. 31 Low and reverse solenoid valve duty %
D No. 32 Underdrive solenoid valve duty %
D No. 33 Second solenoid valve duty %
D No. 34 Overdrive solenoid valve duty %
OK: Refer to the table below.
OK
Adjust the line pressure. (Refer to P.23-62.)
NG
Code No. 23 - Output shaft speed sensor system (Refer to P.23-17.)
NG
Code No. 11, 12, 14 TPS/APS system check (Refer to P.23-15.)
NG
Replace the solenoid valve. L
NG
Repalce the A/T-ECU.
NG
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
No. 31
No. 32
No. 33
No. 34
Driving at constant speed in 1st gear
0%
0%
100 %
100 %
Driving at constant speed in 2nd gear
100 %
0%
0%
100 %
Driving at constant speed in 3rd gear
100 %
0%
100 %
0%
Driving at constant speed in 4th gear
100 %
100 %
0%
0%
23-34
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 12
Some points (Displaced shifting points)
Probable cause
If some of the shift points are displaced while driving, the cause is probably a malfunction
of the valve body, or it is related to control and is not an abnormality.
D
Malfunction of the valve body
L: Refer to the Transmission Workshop Manual.
INVECS-II CANCEL COMMAND
D Use the MUT-II to stop the
INVECS-II function.
Does standard shifting occur normally?
No
Yes
Does the problem occur only when the
automatictransmissionfluidtemperature
is - 29_C or lower or 125_C or higher?
No
Yes
It is related to control and is not an abnormality.
Valve body disassembly, cleaning and
reassembly L
D Pay particular attention to loosening
of bolts, and to damage and slippage
of O-rings, valves and valve bodies.
D If the damage cannot be repaired,
replace the valve body assembly.
INSPECTION PROCEDURE 13
No diagnosis codes (Does not shift)
Probable cause
If shifting does not occur while driving and no diagnosis codes are output, the cause
is probably a malfunction of the inhibitor switch, or A/T-ECU.
D
D
Does the transmission remain in 3rd
gear with selector lever in position
D ?
No
Yes
Is backup power being supplied to the
A/T-ECU?
No
OK
Yes
Is power being supplied to the
A/T-ECU?
No
Power supply circuit check
D Pay particular attention to open
circuits in the harnesses, poor
connector connections and open
circuits in fuses.
D If there is a blown fuse, investigate
why a short-circuit has occurred and
then replace the fuse.
MUT-II Data list
D No. 61 Inhibitor switch
OK: A/T-ECU input signal and selector lever position should
match.
Yes
MUT-II Data list
D No. 62 Hold mode signal
OK: The signal should change
when the mode control switch
position is changed.
OK
Replace the A/T-ECU.
Malfunction of the inhibitor switch
Malfunction of the A/T-ECU
NG
NG
Inhibitor switch check
D INSPECTION PROCEDURE 16 Inhibitor switch system check.
(Refer to P.23-36.)
Mode control switch check
D INSPECTION PROCEDURE 17 Mode control switch system check
(Refer to P.23-36.)
AUTOMATIC TRANSMISSION - Troubleshooting
23-35
INSPECTION PROCEDURE 14
Poor acceleration
Probable cause
If acceleration is poor even if downshifting occurs while driving, the cause is probably
a malfunction of the engine system or of a brake or clutch.
D
D
Malfunction of the engine system
Malfunction of the brake or clutch
L: Refer to the Transmission Workshop Manual.
Engine system check
D Check the control system, ignition system, fuel system and
main system.
NG
Replace, repair
OK
Brake or clutch check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
INSPECTION PROCEDURE 15
Vibration
Probable cause
If vibration occurs when driving at constant speed or when accelerating and deceleration
in top range, the cause is probably abnormal damper clutch pressure or a malfunction
of the engine system, damper clutch control solenoid valve, torque converter or valve
body.
D
D
D
D
D
Abnormal damper clutch pressure
Malfunction of the engine system
Malfunction of the damper clutch control solenoid valve
Malfunction of the torque converter
Malfunction of the valve body
L: Refer to the Transmission Workshop Manual.
MUT-II Actuator test
D No. 6 Damper clutch control solenoid valve
OK: Sound of operation can be heard.
OK
Does the problem occur even when the oil temperature sensor
connector is disconnected?
NG
Yes
No
Hydraulic pressure test (Refer to P.23-56.)
D Measure the damper clutch pressure.
Standard value: Refer to P.23-57.
OK
Replace the torque converter assembly.
NG
Replace the damper clutch control solenoid valve. L
Engine system check
D Check the control system, ignition system, fuel system and
main system.
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
23-36
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 16
Inhibitor switch system
Probable cause
The cause is probably a malfunction of the inhibitor switch circuit, ignition switch
circuit or a defective A/T-ECU.
D
D
D
D
Inhibitor switch check (Refer to P.23-49.)
OK
Check the voltage of the inhibitor switch
connector B-72.
D Disconnect the connector and
measure at the harness side.
D Voltage between terminal No. 8 and
earth
OK: Battery voltage
OK
Check the following connectors:
B-72, C-30, C-47, C-48
OK
Harness check
D Between inhibitor
A/T-ECU connector
NG
Check the trouble symptoms.
the inhibitor switch
the ignition switch
connector
the A/T-ECU
Check the following connectors:
C-49, C-83, C-131, C-134
OK
Harness check
D Between inhibitor switch and
ignition switch
NG
NG
NG
Repair
Repair
OK
Repair
Check the trouble symptoms.
NG
and
OK
of
of
of
of
Replace
NG
NG
switch
Malfunction
Malfunction
Malfunction
Malfunction
Repair
NG
Ignition switch check
(Refer to GROUP54 - Ignition Switch.)
Repalce the A/T-ECU.
INSPECTION PROCEDURE 17
Mode control switch system
Probable cause
The cause is probably a defective mode control switch circuit or a defective A/T-ECU.
D
D
D
Mode control switch check
(Refer to P.23A-65.)
OK
Check the voltage of the A/T-ECU connector C-30.
D Disconnect the connector and check
at the harness side.
D Ignition switch: ON
D Select the HOLD mode.
D Voltage between terminal No. 70 and
earth
OK: Battery voltage
NG
NG
Malfunction of the mode control switch
Malfunction of connector
Malfunction of the A/T-ECU
Replace
Check the following connectors:
C-49, C-83, C-89, C-131, C-134
OK
Harness check.
D Between mode control switch and
A/T-ECU
Harness check
D Between mode control switch and
ignition switch
OK
Check the trouble symptoms.
NG
Check the following the connector:
C-30
Check the trouble symptoms.
NG
Repair
Repair
OK
OK
OK
NG
Ignition switch check (Refer to GROUP
54 - Ignition Switch.)
NG
Replace the A/T-ECU.
NG
Repair
23-37
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 18
Idle position switch system
Probable cause
The cause is probably a defective idle position switch circuit or a defective A/T-ECU.
D
D
D
NG
Idle position switch check
(Refer to GROUP 13A - On-vehicle Service.)
Malfunction of the idle position switch
Malfunction of connector
Malfunction of the A/T-ECU
Replace the throttle position sensor.
OK
Check the following connectors:
B-07 <Vehicles without TCL>, B-41 <Vehicles with TCL>, C-29
NG
Repair
OK
NG
Harness check
D Between idle position switch and A/T-ECU
OK
NG
Check the trouble symptoms.
Repair
Replace the A/T-ECU.
INSPECTION PROCEDURE 19
Dual pressure switch system
Probable cause
The cause is probably a defective dual pressure switch circuit or a defective A/T-ECU.
D
D
D
D
Dual pressure switch check (Refer to
GROUP 55 - On-vehicle service.)
OK
Check the voltage of the A/T-ECU connector C-28.
D Disconnect the connector and
check at the harness side.
D Ignition switch: ON
D A/C switch: ON
D Voltage between terminal No. 10
and earth
OK: Battery voltage
NG
A/C system check (Refer to GROUP
55 - Troubleshooting.)
NG
OK
Malfunction
Malfunction
Malfunction
Malfunction
of
of
of
of
the dual pressure switch
connector
A/C system
the A/T-ECU
Replace
Check the following connectors:
B-30, C-28
NG
Repair
OK
Check the trouble symptoms.
NG
Check the A/C system. (Refer to
GROUP 55 - Troubleshooting.)
OK
Replace the A/T-ECU.
NG
Repair
23-38
AUTOMATIC TRANSMISSION - Troubleshooting
INSPECTION PROCEDURE 20
Vehicle speed sensor system
Probable cause
The cause is probably a defective vehicle speed sensor circuit or a defective A/T-ECU.
D
D
D
Check the vehicle speed sensor.
(Refer to GROUP 54 - Combination Meters.)
NG
Malfunction of the vehicle speed sensor
Malfunction of connector
Malfunction of the A/T-ECU
Replace
OK
1. NG
Measure at the vehicle speed sensor connector B-67.
D Disconnect the connector, and measure at the harness side.
2. NG
1. Voltage between 1 and earth (Ignition switch: ON)
OK: Battery voltage
2. Voltage between 3 and earth (Ignition switch: ON)
3. NG
OK: 4.8 - 5.2 V
3. Continuity between 2 and earth
OK: Continuity
OK
Check the
connector:
B-67
following
NG
Repair
Repair
Check trouble symptom.
NG
NG
Repair
Check the ignition switch. (Refer to GROUP 54 - Ignition switch.)
Check trouble symptom.
Check the harness wire
between the engine-ECU
and the vehicle speed
sensor connector.
OK
NG
OK
Check the harness wire
between the vehicle
speed sensor and ignition
switch connector.
OK
OK
NG
Check the following
connectors:
C-90, C-131, C-135
NG
Check the
connectors:
C-30, C-48
Repair
following
NG
Repair
OK
Check trouble symptom.
NG
Replace the engine-ECU.
Check the harness wire
between the engine-ECU
and the vehicle speed
sensor connector.
OK
NG
Repair
Replace the engine-ECU.
Check the harness wire between the vehicle speed sensor and
the earth, and repair if necessary.
INSPECTION PROCEDURE 21
Auto-cruise-ECU signal system
Probable cause
The cause is probably a defective auto-cruise signal line circuit or a defective A/T-ECU.
D
D
D
Auto-cruise system check (Refer to GROUP 17 - Troubleshooting.)
NG
Malfunction of connector
Malfunction of the A/T-ECU
Malfunction of the auto-cruise-ECU
Repair
OK
Check the following connectors: C-28, C-82, C-83
OK
Harness check
D Between auto-cruise-ECU and A/T-ECU
NG
Repair
NG
OK
Repair
Replace the A/T-ECU.
23-39
AUTOMATIC TRANSMISSION - Troubleshooting
DATA LIST REFERENCE TABLE
Item No. Check item
Check requirement
11
Engine: Stopped
Selector lever
position: P
Throttle position sensor
<Vehicles without TCL>
Accelerator pedal
position sensor
<Vehicles with TCL>
23100810208
Normal value
Accelerator pedal:
Released
400 - 1,000 mV
Accelerator pedal:
Halfly depressed
Gradually rises from the
above value
Accelerator pedal:
Depressed
4,500 - 5,000 mV
15
Oil temperature sensor
Warming up
Drive for 15 minutes or
more so that the
automatic transmission
fluid temperature
becomes 70 - 90 _C.
Gradually rises to
70 - 90 _C
21
Crank angle sensor
Engine: Idling
Selector lever
position: P
Accelerator pedal:
Released
550 - 900 rpm
Accelerator pedal:
Halfly depressed
Gradually rises from the
above value
22
Input shaft speed
sensor
Selector lever
position: 3
Driving at constant speed
of 50 km/h in 3rd gear
1,800 - 2,100 rpm
23
Output shaft speed
sensor
Selector lever
position: 3
Driving at constant speed
of 50 km/h in 3rd gear
1,800 - 2,100 rpm
25
Wide open throttle
switch
Accelerator pedal
position
Released
OFF
Depressed
ON
Stop lamp switch
Ignition switch: ON
Engine: Stopped
Brake pedal: Depressed
ON
Brake pedal: Released
OFF
Selector lever
position: 3
Idling with 1st gear
(Vehicle stopped)
0 km/h
Driving at constant speed
of 50 km/h in 3rd gear
50 km/h
10 km/h in 1st gear
No. 31: 0 %, No. 32: 0
%, No. 33: 100 %,
No. 34: 100%
26
29
Vehicle speed sensor
31
Low and reverse
solenoid valve duty %
Selector lever
position: L, 2, 3, D
32
Underdrive solenoid
valve duty %
30 km/h in 2nd gear
No. 31: 100 %, No. 32:
0 %, No. 33: 0 %,
No. 34: 100%
33
Second solenoid valve
duty %
50 km/h in 3rd gear
No. 31: 100 %, No. 32:
0 %, No. 33: 100 %,
No. 34: 0%
34
Overdrive solenoid valve
duty %
70 km/h in 4th gear
No. 31: 100 %, No. 32:
100 %, No. 33: 0 %,
No. 34: 0%
23-40
AUTOMATIC TRANSMISSION - Troubleshooting
Item No. Check item
Check requirement
36
Selector lever
position: 3
52
Damper clutch control
solenoid valve duty %
Amount of damper
clutch slippage
Selector lever
position: 3
Normal value
Driving at 50 km/h in
3rd gear with accelerator
released
0%
Driving at constant speed
of 70 km/h in 3rd gear
Approx. 70 - 90 %
Driving at 50 km/h in 3rd
gear with accelerator
fully closed
Approx. 100 - 300 rpm*
Driving at constant speed
of 70 km/h in 3rd gear
Approx. 0 - 10 rpm
54
Control relay output
voltage
Ignition switch : OFF
Ignition switch:
ON ® OFF
Battery voltage (mV) ®
0 mV
57
Engine volumetric
efficiency
Selector lever
position: N
N range with accelerator
pedal released ®
depressed.
Data changes
61
Inhibitor switch
Ignition switch: ON
Engine: Stopped
Selector lever position: P
P
Selector lever position: R
R
Selector lever position: N
N
Selector lever position: D
D
Selector lever position: 3
3
Selector lever position: 2
2
Selector lever position: L
L
Mode control switch
position
HOLD
ON
AUTO
OFF
Selector lever position: L, 2, 3, D
Driving at constant speed
of 10 km/h in 1st gear
1st
Driving at constant speed
of 30 km/h in 2nd gear
2nd
Driving at constant speed
of 50 km/h in 3rd gear
3rd
Driving at constant speed
of 70 km/h in 4th gear
4th
Engine: Idling
Selector lever position: N
Accelerator pedal:
Released
ON
Accelerator pedal:
Halfly depressed
OFF
Engine: Idling
Selector lever position: N
A/C switch: ON
ON
A/C switch: OFF
OFF
62
63
64
65
HOLD mode signal
Shift position
Idle position switch
Dual pressure switch
23-41
AUTOMATIC TRANSMISSION - Troubleshooting
Item No. Check item
Check requirement
66
While auto-cruise
operating
Auto-cruse-ECU signal
Normal value
Plain road
OFF
Sloping road
ON
NOTE
*: The damper clutch is released when the accelerator is fully closed (Idle position switch: ON).
ACTUATOR TEST JUDGEMENT VALUE
23100820065
Item No.
Check item
Test content
Check requirement
Normal value
1
Low reverse solenoid valve
2
Underdrive solenoid valve
Second solenoid valve
4
Overdrive solenoid valve
6
Damper clutch control
solenoid valve
12
A/T control relay
Ignition switch: ON
Selector lever
position: P
Engine: 0 r/min
Vehicle speed:
0 km/h
(Vehicle stopped)
Throttle
(Accelerator)
opening voltage:
Less than 0 V
Idle switch: ON
The operation sound should
be audible when the solenoid
valve is driven.
3
Drive the solenoid
valve specified by
the MUT-II at 50 %
duty for 5 seconds.
No other solenoid
valve should be
energised.
Control relay is OFF
for 3 seconds.
Data list No. 54
(1) During test: 0 mV
(2) Normal: Battery voltage
[mV]
INVECS-II CANCEL COMMAND
23100950023
Item No.
Item
Content
Remarks
14
INVECS-II
Stop the INVECS-II control and change gears
according to the standard shift pattern.
Use this function when carrying
out procedure 8 in the road
tests.
23-42
AUTOMATIC TRANSMISSION - Troubleshooting
CHECK AT A/T-ECU TERMINALS
23100840207
Terminal
No.
Check item
Check requirement
Standard value
1
Underdrive solenoid valve
Selector lever position: D (1st gear)
Battery voltage
Selector lever position: P
Approx.7 - 9 V
Ignition switch: OFF
0V
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0V
Ignition switch: ON
Battery voltage
No OD-OFF request
Battery voltage
OD-OFF request
0V
A/C switch: OFF
0V
A/C switch: ON
Battery voltage
Ignition switch: OFF
0V
Ignition switch: ON
Battery voltage
2
3
8
10
11
Solenoid valve power supply
Solenoid valve power supply
Auto-cruse control unit
A/C compressor load signal
Power supply
12
Earth
Always
0V
13
Earth
Always
0V
14
Overdrive solenoid valve
Selector lever position: D (3rd gear)
Battery voltage
Selector lever position: P
Approx. 7 - 9 V
Damper clutch control solenoid
valve
Selector lever position: L (1st gear)
Battery voltage
Selector lever position: 3 (50 km/h in 3rd gear)
Other than
battery voltage
Second solenoid valve
Selector lever position: 2 (2nd gear)
Battery voltage
Selector lever position: P
Approx. 7 - 9 V
Ignition switch: ON (except during shifting)
4 - 5V
15
16
21
Engine-ECU torque reduction
request signal
<Vehicles with TCL>
23-43
AUTOMATIC TRANSMISSION - Troubleshooting
Terminal
No.
Check item
Check requirement
Standard value
23
Diagnosis control
-
-
24
Power supply
Ignition switch: OFF
0V
Ignition switch: ON
Battery voltage
25
Earth
Always
0V
26
Earth
Always
0V
31
Input shaft speed sensor
Measure between terminal No. 31 and No. 43 by
an oscilloscope.
Engine: 2,000 r/min
Selector lever position: 3
Refer to P.23-45,
Oscilloscope
inspection
procedure.
32
Output shaft speed sensor
Measure between terminal No. 32 and No. 43 by
an oscilloscope.
Engine: 2,000 r/min
Selector lever position: 3
Refer to P.23-45,
Oscilloscope
inspection
procedure.
33
Crank angle sensor
Engine: Idling
2.0 - 2.4 V
36
Idle position switch
Engine: Idling
0V
Engine: Other than idling
5V
38
Back up power suuply
Ignition switch: OFF
Battery voltage
43
Sensor earth
Always
0V
44
Oil temperature sensor
ATF temperature: 25 _C
3.8 - 4.0 V
ATF temperature: 80 _C
2.3 - 2.5 V
Throttle position sensor (TPS)
<Vehicles without TCL>
Accelerator pedal position sensor
(APS) <Vehicles with TCL>
Accelerator pedal: Released (Engine stopped)
0.5 - 1.0 V
Accelerator pedal: Depressed (Engine stopped)
4.5 - 5.0 V
53
Communication with engine-ECU
<Vehicles without TCL>
Communication with TCL-ECU
<Vehicles with TCL>
Engine: Idling
Selector lever position: D
Other than 0 V
54
Communication with engine-ECU
<Vehicles without TCL>
Communication with TCL-ECU
<Vehicles with TCL>
Engine: Idling
Selector lever position: D
Other than 0 V
55
Inhibitor switch P
Selector lever position: P
Battery voltage
Selector lever position: Other than above
0V
Selector lever position: N
Battery voltage
Selector lever position: Other than above
0V
Selector lever position: 3
Battery voltage
Selector lever position: Other than above
0V
45
56
57
Inhibitor switch N
Inhibitor switch 3
23-44
AUTOMATIC TRANSMISSION - Troubleshooting
Terminal
No.
Check item
Check requirement
Standard value
58
Inhibitor switch L
Selector lever position: L
Battery voltage
Selector lever position: Other than above
0V
Brake pedal: Depressed
Battery voltage
Brake pedal: Released
0V
Selector lever position: D (1st gear)
Battery voltage
Selector lever position: D (2nd gear)
Approx. 7 - 9 V
59
62
Stop lamp switch
Low and reverse solenoid valve
63
Diagnosis output
Normal (No diagnosis code output)
0 ® 5 V flashing
65
Wide open throttle switch
Accelerator pedal: Released
4.5 - 5.5 V
Accelerator pedal: Depressed
Less than 0.4 V
Selector lever position: R
Battery voltage
Selector lever position: Other than above
0V
Selector lever position: D
Battery voltage
Selector lever position: Other than above
0V
Selector lever position: 2
Battery voltage
Selector lever position: Other than above
0V
When stopped
0V
Move forward slowly
0 ® 5 V flashing
Select HOLD mode
Battery voltage
Select AUTO mode
0V
Ignition switch: OFF
0V
Ignition switch: ON
Battery voltage
Ignition switch: ON
0V
66
67
68
69
70
71
72
Inhibitor switch R
Inhibitor switch D
Inhibitor switch 2
Vehicle speed sensor
Mode control switch
A/T control relay
Earth
AUTOMATIC TRANSMISSION - Troubleshooting
OSCILLOSCOPE INSPECTION PROCEDURE
23-45
23100850064
Check item
Check requirement
Crank angle sensor
Selector lever position: N
Idling (Vehicle stopped)
Waveform A
Input shaft speed
sensor
Selector lever position: 3
Driving at constant speed of 50
km/h in 3rd gear
(Engine: 1,800 - 2,100 r/min)
Waveform B
Ignition switch: ON
Selector lever position: P
Engine: 0 r/min
Vehicle speed: 0 km/h
(Vehicle stopped)
Throttle (Accelerator) opening
angle: Less than 1 V
Idle switch: ON
Force drive each solenoid valve
(Actuator test)
Waveform C
Output shaft
speed sensor
Normal condition
(Waveform sample)
Vehicle speed sensor
Low reverse
solenoid valve
Underdrive solenoid
valve
Second solenoid
valve
Overdrive solenoid
valve
Damper clutch
control solenoid
valve
Waveform sample
Waveform A
Waveform B
(V)
Waveform C
(V)
60
(V)
5
5
40
20
0
0
(ms)
(ms)
0
(ms)
23-46
AUTOMATIC TRANSMISSION - On-vehicle Service
ON-VEHICLE SERVICE
23100090237
ESSENTIAL SERVICE
AUTOMATIC TRANSMISSION FLUID CHECK
1. Drive the vehicle until the fluid temperature rises to the
normal temperature (70 - 80_C).
2. Park the vehicle on a level surface.
3. Move the selector lever through all positions to fill the
torque converter and the hydraulic circuits with fluid, and
then move the selector lever to the N position.
4. After wiping off any dirt around the oil level gauge, remove
the oil level gauge and check the condition of the fluid.
NOTE
If the fluid smells as if it is burning, it means that the
fluid has been contaminated by the particles from the
bushes and friction materials, a transmission overhaul
and flushing the cooler line may be necessary.
5. Check that the fluid level is at the HOT mark on the
oil level gauge. If the fluid level is lower than this, pour
in more fluid until the level reaches the HOT mark.
Automatic transmission fluid:
Dia Queen ATF SP II or equivalent
NOTE
If the fluid level is low, the oil pump will draw in air along
with the fluid, which will cause bubbles to form inside
the hydraulic circuit. This will in turn cause the hydraulic
pressure to drop, which will result in late shifting and
slipping of the clutches and brakes.
If there is too much fluid, the gears can churn it up into
foam and cause the same conditions that can occur with
low fluid levels.
In either case, air bubbles can cause overheating and
oxidation of the fluid which can interfere with normal valve,
clutch, and brake operation. Foaming can also result in
fluid escaping from the transmission vent, in which case
it may be mistaken for a leak.
6. Securely insert the oil level gauge.
7. The fluid and oil filters should always be replaced in the
following conditions:
When troubleshooting the transmission
When overhauling the transmission
When the oil is noticeably dirty or deteriorates (driving
under the severe condition)
Furthermore, the oil filters are special filters which are
only to be used for the automatic transmission.
AUTOMATIC TRANSMISSION - On-vehicle Service
23-47
AUTOMATIC TRANSMISSION FLUID REPLACEMENT
23100100251
If you have a fluid changer, use this changer to replace the
fluid. If you do not have a fluid changer, replace the fluid
by the following procedure.
1. Disconnect the hose shown in the illustration which
connects the transmission and the oil cooler (inside the
radiator).
2. Start the engine and let the fluid drain out.
Running conditions: N range with engine idling
Caution
The engine should be stopped within one minute after
it is started. If the fluid has all drained out before
then, the engine should be stopped at that point.
Discharge volume: Approx. 3.5 L
3. Remove the drain plug from the bottom of the transmission
case to drain the fluid.
Discharge volume: Approx. 2.0 L
4. Replace the oil filters. (Refer to P.23-48.)
5. Install the drain plug via a new gasket, and tighten it
to the specified torque.
Tightening torque: 32 Nm
6. Pour the new fluid in through the oil filler tube.
Adding volume: Approx. 5.5 L
Caution
Stop pouring if the full volume of fluid cannot be
poured in.
7. Repeat the procedure in step 2.
NOTE
Drain the fluid from the cooler hose 7 L at least. Then
drain the fluid a little and check the fluid for dirt.
If it has been contaminated, repeat the steps 6 and 7.
8. Pour the new fluid in through the oil filler tube.
Adding volume: Approx. 3.5 L
23-48
AUTOMATIC TRANSMISSION - On-vehicle Service
9. Reconnect the hose which was disconnected in step 1
above, and firmly replace the oil level gauge.
10. Start the engine and run it at idle for 1 - 2 minutes.
11. Move the selector lever through all positions, and then
move it to the N position.
12. Check that the fluid level is at the COLD mark on the
oil level gauge. If the level is lower than this, pour in
more fluid.
13. Drive the vehicle until the fluid temperature rises to the
normal temperature (70 - 80_C), and then check the
fluid level again.
The fluid level must be at the HOT mark.
NOTE
The COLD level is for reference only; the HOT level should
be regarded as the standard level.
Apply ATF
to O-ring
14. Firmly insert the oil level gauge into the oil filler tube.
23101050067
OIL FILTER REPLACEMENT
1. Use the special tool (MB991610) to remove the automatic
transmission oil filter.
2. Clean the filter bracket side mounting surface.
3. Apply a small amount of automatic transmission fluid to
the O-ring of the new oil filter.
4. Use the special tool (MB991610) to install the automatic
transmission oil filter.
NOTE
Tightening torque: 12 Nm
5. Check the quantity of the automatic transmission fluid.
(Refer to P.23-46.)
THROTTLE POSITION SENSOR ADJUSTMENT
<Vehicles without TCL>
Refer to GROUP 13A - On-vehicle Service.
23100190142
ACCELERATOR PEDAL POSITION SENSOR
ADJUSTMENT <Vehicles with TCL>
Refer to GROUP 13A - On-vehicle Service.
23100250048
23-49
AUTOMATIC TRANSMISSION - On-vehicle Service
INHIBITOR SWITCH CONTINUITY CHECK
Items
23100140345
Terminal No.
1
2
3
4
5
6
7
8
9
10
P
R
N
D
Inhibitor switch
3
2
L
P
R
N
D
3
2
L
Transmission
control cable
Manual
control
lever
Adjusting nut
INHIBITOR SWITCH AND CONTROL CABLE
23100150096
ADJUSTMENT
1. Set the selector lever to the “N” position.
2. Loosen the control cable to manual control lever coupling
nut to free the cable and lever.
3. Set the manual control lever to the neutral position.
23-50
AUTOMATIC TRANSMISSION - On-vehicle Service
10 - 12 Nm
Mounting bolts
A
4. Loosen the inhibitor switch body mounting bolts and the
turn the inhibitor switch body so the hole in the end of
the manual control lever and the hole (cross section A-A
in the figure on the left) in the flange of the inhibitor
switch body flange are aligned.
5. Tighten the inhibitor switch body mounting bolts to the
specified torque. Be careful at this time that the position
of the switch body is not changed.
A
Manual
control lever
Section A-A
Hole in end
Hole in
flange
Manual control
lever
Inhibitor
switch body
12 Nm
Adjusting nut
Manual control lever
6. Gently pull the transmission control cable in the direction
of the arrow, and then tighten the adjusting nut.
7. Check that the selector lever is in the “N” position.
8. Check that each range on the transmission side operates
and functions correctly for each position of the selector
lever.
23-51
AUTOMATIC TRANSMISSION - On-vehicle Service
A/T CONTROL COMPONENT LOCATION
23100860234
Name
Symbol
Name
Symbol
Accelerator position sensor (with idle position
switch) <Vehicles with TCL>
C
Mode control switch
L
A/T control relay
M
Oil temperature sensor
G
A/T-ECU
K
Output shaft speed sensor
E
Crank angle sensor
B
Shift indicator lamp
I
Diagnosis connector
O
Solenoid valve
G
Dual pressure switch
A
Stop lamp switch
P
Engine ECU
K
TCL-ECU
J
Inhibitor switch
F
Throttle position sensor (with idle position
switch) <Vehicles without TCL>
C
Input shaft speed sensor
H
Vehicle speed sensor
D
Wide open throttle switch
N
C
D
B
E
A
F
G
H
I
P
O
K
N
M
L
J
23-52
AUTOMATIC TRANSMISSION - On-vehicle Service
A/T CONTROL COMPONENT CHECK
23100900011
CRANK ANGLE SENSOR CHECK
Refer to GROUP 13A - Troubleshooting.
THROTTLE POSITION SENSOR CHECK
<Vehicles without TCL>
Refer to GROUP 13A - On-vehicle Service.
23100390030
ACCELERATOR PEDAL POSITION SENSOR CHECK
23100420029
<Vehicles with TCL>
Refer to GROUP 13H - On-vehicle Service.
OIL TEMPERATURE SENSOR CHECK
1. Remove the oil temperature sensor.
23100450035
Oil temperature sensor
2. Measure the resistance between terminals No. 1 and
No. 2 of the oil temperature sensor connector.
Standard value:
ATF
Oil temperature (_C)
Resistance (kW)
0
16.7- 20.5
100
0.57- 0.69
INHIBITOR SWITCH CHECK
Refer to P.23A-49.
23100140352
STOP LAMP SWITCH CHECK
Refer to GROUP 35 - Brake Pedal.
23100910014
VEHICLE SPEED SENSOR CHECK
Refer to GROUP 54 - On-vehicle Service.
23100460038
AUTOMATIC TRANSMISSION - On-vehicle Service
23-53
DUAL POSITION PRESSURE SWITCH CHECK
23100470031
Refer to GROUP 55 - On-vehicle Service.
IDLE POSITION SWITCH CHECK
Refer to GROUP 13A - On-vehicle Service.
23100410033
MODE CONTROL SWITCH CHECK
Refer to P.23-65.
23100920048
WIDE OPEN THROTTLE SWITCH CHECK
Refer to P.23-64.
23100890080
A/T CONTROL RELAY CHECK
1. Remove the A/T control relay.
23100930065
2. Use jumper wires to connect A/T control relay terminal
2 to the battery ( - ) terminal and terminal 4 to the battery
(+) terminal.
3. Check the continuity between terminal 1 and terminal
3 of the A/T control relay when the jumper wires are
connected to and disconnected from the battery.
Jumper wire
Continuity between terminals No. 1
and No. 3
Connected
Continuity
Disconnected
No continuity
4. If there is a problem, replace the A/T control relay.
23-54
Overdrive
solenoid
valve
AUTOMATIC TRANSMISSION - On-vehicle Service
Underdrive
solenoid
valve
23100940013
SOLENOID VALVE CHECK
1. Remove the valve body cover.
2. Disconnect the connectors of each solenoid valve.
Second
solenoid
valve
Low and
reverse
solenoid
valve
Damper
clutch
solenoid
valve
3. Measure the resistance between terminals 1 and 2 of
each solenoid valve.
Standard value:
Name
Resistance
Damper clutch solenoid valve
2.7 - 3.4 W
(at 20_C)
Low and reverse solenoid valve
Second solenoid valve
Underdrive solenoid valve
Overdrive solenoid valve
4. If the resistance is outside the standard value, replace
the solenoid valve.
TORQUE CONVERTER STALL TEST
Reverse
clutch
Torque
converter
Low-reverse Underdrive
brake
clutch
23100540206
This test measures the maximum engine speed when the
selector lever is at the D or R position and the torque converter
stalls to test the operation of the torque converter, starter
motor and one-way clutch operation and the holding
performance of the clutches and brakes in the transmission.
Caution
Do not let anybody stand in front of or behind the vehicle
while this test is being carried out.
1. Check the automatic transmission fluid level and
temperature and the engine coolant temperature.
D Fluid level: At the HOT mark on the oil level gauge
D Fluid temperature: 80 - 100_C
D Engine coolant temperature: 80 - 100_C
AUTOMATIC TRANSMISSION - On-vehicle Service
23-55
2. Check both rear wheels (left and right).
3. Pull the parking brake lever on, with the brake pedal
fully depressed.
4. Start the engine.
5. Move the selector lever to the D position, fully depress
the accelerator pedal and take a reading of the maximum
engine speed at this time.
Caution
1. The throttle should not be left fully open for any
more than eight seconds.
2. If carrying out the stall test two or more times,
move the selector lever to the N position and run
the engine at 1,000 r/min to let the automatic
transmission fluid cool down before carrying out
subsequent tests.
Standard value
Stall speed: 2,100 - 2,600 r/min
6. Move the selector lever to the R position and carry out
the same test again.
Standard value
Stall speed: 2,100 - 2,600 r/min
TORQUE CONVERTER STALL TEST JUDGEMENT
RESULTS
a. Stall speed is too high in both D and R ranges
D Low line pressure
D Low & reverse brake slippage
b. Stall speed is too high in D range only
D Underdrive clutch slippage
c. Stall speed is too high in R range only
D Reverse clutch slippage
d. Stall speed too low in both D and R ranges
D Malfunction of torque converter
D Insufficient engine output
23-56
AUTOMATIC TRANSMISSION - On-vehicle Service
HYDRAULIC PRESSURE TEST
23100550216
1. Warm up the engine until the automatic transmission fluid
temperature is 80 - 100_C.
2. Jack up the vehicle so that the wheels are free to turn.
3. Connect the special tools (2,942 kPa oil pressure gauge
[MD998330] and joints [MD998332, MD998900]) to each
pressure discharge port.
4. Measure the hydraulic pressure at each port under the
conditions given in the standard hydraulic pressure table,
and check that the measured values are within the
standard value ranges.
5. If a value is outside the standard range, correct the
problem while referring to the hydraulic pressure test
diagnosis table.
AUTOMATIC TRANSMISSION - On-vehicle Service
23-57
STANDARD HYDRAULIC PRESSURE TEST
<4G63>
Measurement condition
Standard hydraulic pressure kPa
Selector
lever
position
Shift position
Engine
speed
(r/min)
Underdrive
clutch
pressure
Reverse
clutch
pressure
Overdrive
clutch
pressure
Low and
reverse
brake
pressure
Second
brake
pressure
Torque
converter
pressure
P
-
2,500
-
-
-
310 - 390
-
310 - 390
R
Reverse
2,500
-
1,320 1,720
-
1,320 1,720
-
500 - 700
N
-
2,500
-
-
-
310 - 390
-
310 - 390
D
1st gear
2,500
1,010 1,050
-
-
1,010 1,050
-
500 - 700
2nd gear
2,500
1,010 1,050
-
-
-
1,010 1,050
500 - 700
3rd gear
2,500
590 - 690
-
590 - 690
-
-
450 - 650
4th gear
2,500
-
-
590 - 690
-
590 - 690
450 - 650
<6A13>
Measurement condition
Standard hydraulic pressure kPa
Selector
lever
position
Shift position
Engine
speed
(r/min)
Underdrive
clutch
pressure
Reverse
clutch
pressure
Overdrive
clutch
pressure
Low and
reverse
brake
pressure
Second
brake
pressure
Torque
converter
pressure
P
-
2,500
-
-
-
260 - 340
-
260 - 340
R
Reverse
2,500
-
1,320 1,720
-
1,320 1,720
-
500 - 700
N
-
2,500
-
-
-
260 - 340
-
260 - 340
D
1st gear
2,500
1,010 1,050
-
-
1,010 1,050
-
500 - 700
2nd gear
2,500
1,010 1,050
-
-
-
1,010 1,050
500 - 700
3rd gear
2,500
780 - 880
-
780 - 880
-
-
450 - 650
4th gear
2,500
-
-
780 - 880
-
780 - 880
450 - 650
23-58
AUTOMATIC TRANSMISSION - On-vehicle Service
HYDRAULIC PRESSURE TEST DIAGNOSIS TABLE
Trouble symptom
Probable cause
All hydraulic pressures are high.
Incorrect transmission control cable adjustment
Malfunction of the regulator valve
All hydraulic pressures are low.
Incorrect transmission control cable adjustment
Malfunction of the oil pump
Clogged internal oil filter
Clogged external oil filter
Clogged oil cooler
Malfunction of the regulator valve
Malfunction of the relief valve
Incorrect valve body installation
Hydraulic pressure is abnormal
in “R” range only.
Malfunction of the regulator valve
Clogged orifice
Incorrect valve body installation
Hydraulic pressure is abnormal
in “3” or “4” range only.
Malfunction of the overdrive solenoid valve
Malfunction of the overdrive pressure control valve
Malfunction of the regulator valve
Malfunction of the switch valve
Clogged orifice
Incorrect valve body installation
Only underdrive hydraulic
pressure is abnormal.
Malfunction of the oil seal K
Malfunction of the oil seal L
Malfunction of the oil seal M
Malfunction of the underdrive solenoid valve
Malfunction of the underdrive pressure control valve
Malfunction of check ball
Clogged orifice
Incorrect valve body installation
Only reverse clutch hydraulic
pressure is abnormal.
Malfunction of the oil seal A
Malfunction of the oil seal B
Malfunction of the oil seal C
Clogged orifice
Incorrect valve body installation
AUTOMATIC TRANSMISSION - On-vehicle Service
Trouble symptom
Probable cause
Only overdrive hydraulic
pressure is abnormal.
Malfunction of the oil seal D
Malfunction of the oil seal E
Malfunction of the oil seal F
Malfunction of the overdrive solenoid valve
Malfunction of the overdrive pressure control valve
Malfunction check ball
Clogged orifice
Incorrect valve body installation
Only low and reverse hydraulic
pressure is abnormal.
Malfunction of the oil seal I
Malfunction of the oil seal J
Malfunction of the low and reverse solenoid valve
Malfunction of the low and reverse pressure control valve
Malfunction of the switch valve
Malfunction of the fail safe valve A
Malfunction of check ball
Clogged orifice
Incorrect valve body installation
Only second hydraulic pressure
is abnormal.
Malfunction of the oil seal G
Malfunction of the oil seal H
Malfunction of the oil seal O
Malfunction of the second solenoid valve
Malfunction of the second pressure control valve
Malfunction of the fail safe valve B
Clogged orifice
Incorrect valve body installation
Only torque converter pressure
is abnormal.
Malfunction of the oil cooler
Malfunction of the oil seal N
Malfunction of the damper clutch control solenoid valve
Malfunction of the damper clutch control valve
Malfunction of the torque converter pressure control valve
Clogged orifice
Incorrect valve body installation
Pressure applied to non
operating element.
Incorrect transmission control cable adjustment
Malfunction of the manual valve
Malfunction of check ball
Incorrect valve body installation
23-59
23-60
AUTOMATIC TRANSMISSION - On-vehicle Service
OIL SEAL LAYOUT
E
F G
H
J
I
D
C
B
A
O
K
L
M
N
23-61
AUTOMATIC TRANSMISSION - On-vehicle Service
HYDRAULIC CIRCUIT
23100880070
PARKING AND NEUTRAL
1
2
3
6
4
6
6
5
6
7
8
9
10
11
12
13
14
15
19
17
21
16
20
24
18
22
23
25
26
R ND
P3
2
L
27
29
28
30
31
32
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Reverse clutch
Low-reverse brake
Second brake
Underdrive clutch
Overdrive clutch
Accumulator
Check ball
Damper clutch
Fail safe valve A
Fail safe valve B
Damper clutch control valve
Switch valve
Automatic transmission fluid cooler
Lubrication
Low-reverse pressure control valve
Second pressure control valve
Underdrive pressure control valve
18. Overdrive pressure control valve
19. Damper clutch control solenoid
valve
20. Low-reverse solenoid valve
21. Second solenoid valve
22. Underdrive solenoid valve
23. Overdrive solenoid valve
24. Torque converter pressure control
valve
25. Regulator valve
26. Manual valve
27. Oil filter
28. Oil pump
29. Oil strainer
30. Oil filter (Built in type)
31. Relief valve
32. Oil pan
23-62
AUTOMATIC TRANSMISSION - On-vehicle Service
LINE PRESSURE ADJUSTMENT
Adjusting
screw
23100170122
1. Discharge the automatic transmission fluid, and then
remove the valve body cover.
2. Turn the adjusting screw shown in the illustration at left
to adjust the underdrive pressure to the standard value.
The pressure increases when the screw is turned to the
left.
NOTE
When adjusting the underdrive pressure, adjust to the
middle of the standard value range.
Standard value: 1,010 - 1,050 kPa
Change in pressure for each turn of the adjusting screw:
35 kPa
3. Install the valve body cover, and pour in the standard
volume of automatic transmission fluid.
4. Carry out a hydraulic pressure test. (Refer to P.23-56.)
Readjust the line pressure if necessary.
SELECTOR LEVER OPERATION CHECK
23100130090
Push button
Button not pressed
Button pressed
1. Shift selector lever to each range and check that lever
moves smoothly and is controlled. Check that position
indicator is correct.
2. Check the selector lever can be moved to each position
(by button operation as shown in the illustration).
3. Start the engine and check if the vehicle moves forward
when the selector lever is moved from N or D, and moves
backward when moved to R.
4. When the shift lever malfunctions, adjust control cable
and selector lever sleeve. Check for worm shift lever
assembly sliding parts.
23-63
AUTOMATIC TRANSMISSION - Transmission Control
TRANSMISSION CONTROL
23100660247
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
D Air Cleaner Assembly Removal and Installation
D Battery and Battery Tray Removal and Installation
D Lower Cover and Side Cover Removal and
Installation (Refer to GROUP 52A - Instrument
Panel.)
D Floor Console Box Removal and Installation
(Refer to GROUP 52A.)
Caution: SRS
Be careful not to subject the SRS-ECU to any
shocks during removal and installation of the
transmission control cable and selector lever
assembly.
2
9
1
12 Nm
3
4
6
8
12 Nm
7
5
12 Nm
7
Transmission control cable removal
steps
1. Foot rest <R.H. drive vehicles>
2. Engine-ECU, A/T-ECU and A/T
control relay assembly
"AA 3. Nut
4. Adjuster
5. Transmission control cable connection
6. Transmission control cable assembly
Selector lever assembly removal
steps
5. Transmission control cable connection
7. Wiring harness connector
8. Selector lever assembly
A/T-ECU removal steps
1. Foot rest <R.H. drive vehicles>
2. Engine-ECU, A/T-ECU and A/T
control relay assembly
Wide open throttle switch removal
step
9. Wide open throttle switch
23-64
AUTOMATIC TRANSMISSION - Transmission Control
INSTALLATION SERVICE POINT
Nut
Manual control lever
"AA NUT INSTALLATION
1. Put the selector lever in the “N” position.
2. Loosen the adjusting nut, gently pull the transmission
control cable in the direction of the arrow and tighten
the nut.
INSPECTION
23100890097
WIDE OPEN THROTTLE SWITCH CHECK
OFF
ON
Switch position
Terminal No.
1
OFF
ON
2
23-65
AUTOMATIC TRANSMISSION - Transmission Control
SELECTOR LEVER ASSEMBLY
23100680168
DISASSEMBLY AND REASSEMBLY
1
2
3
4
6
2 Nm
5
8
10
2 Nm
7
12
14
11
11
15
13 Nm
13
9
Disassembly steps
1. Push button
2. Spring
3. Bumper
4. Adjuster
5. Shift knob
6. Indicator panel assembly
7. Switch holder
8. A/T mode changeover switch
9.
10.
11.
12.
13.
14.
15.
Bolt
Shift lever assembly
Bushing
Detent spring
Pipe
Position indicator lamp assembly
Bracket assembly
INSPECTION
23100670059
A/T MODE CHANGEOVER SWITCH CHECK
Switch position
Terminal No.
1
OFF
ON
2
4
3
5
23-66
AUTOMATIC TRANSMISSION - Transmission Assembly
TRANSMISSION ASSEMBLY
23100570274
REMOVAL AND INSTALLATION
Pre-removal Operation
D Carry out the essential service for the
troubleshooting (Refer to P.23-46.)
D Transmission Fluid Draining (Refer to P.23-47.)
D Under Cover Removal
D Battery and Battery Tray Removal
D Air Cleaner Assembly Removal
12 Nm
3
Post-installation Operation
D Air Cleaner Assembly Installation
D Battery and Battery Tray Installation
D Under Cover Installation
D Transmission Fluid Supplying <Supplying should
be done before starting the engine>
(Refer to P.23-47.)
D Check the Dust Cover for Cracks or Damage by
Pushing it with Finger.
D Selector Lever Operation Check
D Speedometer Operation Check
D Wheel Alignment Adjustment
(Refer to GROUP 33A - On-vehicle Service.)
4
6
2
8
103 Nm
11
44 Nm
7
5
17
88 Nm*1
12
98 - 118 Nm*1
1
10
17
10 - 12 Nm
81 Nm
14
13
30 Nm
30 Nm
24 - 33 Nm
9
67 - 78 Nm
81 Nm
16
98 - 118 Nm
Removal steps
1. Transmission control cable connection
2. Transmission fluid cooler hoses
connection
3. Bolt
4. Input shaft speed sensor connector
5. Output shaft speed sensor
connector
6. Inhibitor switch connector
7. A/T control solenoid valve assembly connector
8. Vehicle speed sensor connector
9. Starter motor <6A1>
15
88 Nm
AA"
AB"
10.
11.
12.
13.
14.
15.
16.
17.
Tie rod end connection
Stabilizer link connection
Damper fork
No. 2 stay
Lateral lower arm connection
No. 3 stay
Compression lower arm connection
Drive shaft
AC"
Caution
*1: Indicates parts which should be temporarily
tightened, and then fully tightened with the
vehicle on the ground in the unladen condition.
23-67
AUTOMATIC TRANSMISSION - Transmission Assembly
57 Nm
20
18
49 Nm
10 - 12 Nm
30 Nm
81 Nm*2
26
21
19
21
45 - 52 Nm
27
26
24
49 Nm
25 Nm
49 Nm
57 Nm*2
25
44 Nm
7 Nm
10 Nm <Flange bolts>
9 Nm <Washer assembled bolts>
23
22
69 Nm
93 Nm
69 - 78 Nm
18. Starter motor <4G6>
19. Transmission assembly upper part
coupling bolts
AD"
20. Transmission mount bracket
"BA 21. Transmission mount stopper
AE"
D Engine and transmission assembly
supporting
22. Centermember assembly
23. Rear roll stopper
24. Bell housing cover <4G6>
25. Cover <6A1>
26. Transmission assembly lower part
coupling bolts
AF" "AA 27. Transmission assembly
AF"
Caution
Mounting locations marked by *2 should be
provisionally tightened, and then fully tightened after
placing the vehicle horizontally and loading the full
weight of the engine on the vehicle body.
23-68
AUTOMATIC TRANSMISSION - Transmission Assembly
REMOVAL SERVICE POINTS
Cord
AA" TIE ROD END DISCONNECTION
Ball joint
MB990635 or
MB991113
Caution
1. Use the special tool to loosen the tie rod end mounting
nut. Only loosen the nut; do not remove it from the
ball joint.
2. Support the special tool with a cord, etc. not to let
it come off.
Nut
AB" NO.3 STAY REMOVAL
No.3 stay is tightened together with the crossmember.
Therefore, after removing No.3 stay, install the nut and bolt
to the crossmember provisionally.
No.3 stay
Crossmember
Transmission
side
Pry bar
AC" DRIVE SHAFT DISCONNECTION
1. Insert a pry bar between the transmission case and the
drive shaft as shown to remove the drive shaft.
NOTE
Do not remove the hub and knuckle from the drive shaft.
Caution
Always use a pry bar, or the TJ will be damaged.
2. Suspend the removed drive shaft with a wire so that
there are no sharp bends in any of the joints.
3. Use a shop towel to cover the transmission case not
to let foreign material get into it.
AD" TRANSMISSION MOUNT BRACKET REMOVAL
Jack up the transmission assembly gently with a garage jack,
and then remove the transmission mount bracket.
AUTOMATIC TRANSMISSION - Transmission Assembly
MZ203827
23-69
AE" ENGINE AND TRANSMISSION ASSEMBLY
SUPPORTING
Set the special tool to the vehicle to support the engine and
transmission assembly.
MB991453
Drive plate bolts
AF" TRANSMISSION
ASSEMBLY
LOWER
PART
COUPLING BOLTS/TRANSMISSION ASSEMBLY
REMOVAL
1. Support the transmission assembly by using a
transmission jack.
2. Remove the drive plate bolts while turning the crank shaft.
3. Press in the torque converter to the transmission side
so that the torque converter does not remain on the engine
side.
4. Remove the transmission assembly lower bolts and lower
the transmission assembly.
INSTALLATION SERVICE POINTS
"AA TRANSMISSION ASSEMBLY INSTALLATION
After securely inserting the torque converter into the
transmission side so that the value shown in the illustration
becomes the reference value, install the transmission
assembly to the engine.
A
Reference value (A): Approx. 12.2 mm
"BA TRANSMISSION MOUNT STOPPER
INSTALLATION
Install the transmission mount stopper so that the arrow points
as shown in the illustration.
Engine side
Arrow
Transmission
mount bracket
Transmission mount
stopper
NOTES