DIAGNOSTIC PROCEDURES FOR SYMPTOMS. Nissan Automatic Transmission

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

1. SPORT Indicator Lamp Does Not Come On

SYMPTOM:

POWER indicator lamp does not come on for about 2 seconds when turning ignition switch to “ON”.

YAT332

YAT333

YAT334

CHECK TCM POWER SOURCE.

1. Turn ignition switch to “ON” position.

(Do not start engine.)

2. Check voltage between TCM terminals q

, q and ground.

Battery voltage should exist.

OK

NG

E

Check the following items:

I

Harness for short or open between ignition switch and TCM (Main harness)

I

Ignition switch and fuse

Refer to EL section

(“POWER SUPPLY

ROUTING”).

H

CHECK TCM GROUND CIRCUIT.

1. Turn ignition switch to “OFF” position.

2. Disconnect TCM harness connector.

3. Check resistance between TCM terminals q

, q and ground.

Resistance:

Approximately 0

Ω

If OK, check harness for short to ground and short to power.

OK

H

CHECK LAMP CIRCUIT.

1. Turn ignition switch to “ON” position.

2. Set overdrive control, A/T check or power switch to “ON” position.

3. Check voltage between TCM terminal q and ground.

Voltage: Battery voltage

4. Reinstall any part removed.

OK

Check again.

OK

H

INSPECTION END

NG

E

Repair open circuit or short to ground or short to power in harness or connector.

NG

E

Check the following items:

I

Fuse (7.5A)

I

SPORT indicator lamp

Refer to EL section

(“WARNING LAMPS”).

I

Harness for short or open between ignition switch and SPORT indicator lamp (Main harness)

Refer to EL section

(“POWER SUPPLY

ROUTING”).

I

Harness for short or open between SPORT indicator lamp and TCM

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-94

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

NAT309

2. SPORT or SNOW Indicator Lamp Does Not

Come On

SYMPTOM:

SPORT or SNOW indicator lamp does not come on when turning A/T mode switch to the appropriate position.

Is 1. O/D OFF, SPORT or A/T CHECK

Indicator Lamp Does Not Come On OK?

No

E

Go to 1. SPORT Indicator

Lamp Does Not Come On,

AT-92.

Yes

H

Check the following items:

I

A/T mode switch

Refer to AT-92.

I

SNOW indicator lamp

I

Harness continuity between ignition switch and A/T mode switch

I

Harness continuity between A/T mode switch and TCM

NG

E

Repair or replace damaged parts.

NAT232

3. O/D OFF Indicator Lamp Does Not Come On

SYMPTOM:

O/D OFF indicator lamp does not come on when setting overdrive control switch to “OFF” position.

Check the following items:

I

Overdrive control switch

I

O/D OFF indicator lamp

I

Harness continuity between ignition switch and O/D OFF indicator lamp

NG

E

Repair or replace damaged parts.

AT-95

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

4. SPORT Indicator Lamp Does Not Come On

SYMPTOM:

SPORT indicator lamp does not come on for about 3 seconds when depressing and releasing accelerator pedal fully.

NAT309

Does self-diagnosis show damage to throttle (accelerator) position sensor circuit?

Yes

YAT337

No

E

Check throttle (accelerator) position sensor. Refer to

AT-60.

H

Check throttle (accelerator) position sensor. — Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN” (DTC 43)].

OK

H

1. Perform TCM input/output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

NG

E

Repair or replace throttle

(accelerator) position sensor.

NAT262

AT-96

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

5. Engine Cannot Be Started In “P” and “N”

Position

SYMPTOM:

I

Engine cannot be started with selector lever in “P” or “N” position.

I

Engine can be started with selector lever in “D”, “2”, “1” or “R” position.

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to park/ neutral position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check park/neutral position

switch. Refer to AT-88.

NAT275

Does self-diagnosis show damage to park/neutral position switch circuit?

No

H

Check for short or open of park/neutral position switch 2-pin connector. Refer to

AT-88.

H

OK

Check starting system. Refer to EL section (“System Description”, “STARTING

SYSTEM”).

H

OK

INSPECTION END

NG

E

Repair or replace park/ neutral position switch.

NG

E

Repair or replace damaged parts.

SAT133B

6. In “P” Position, Vehicle Moves Forward Or

Backward When Pushed

SYMPTOM:

Vehicle moves when it is pushed forward or backward with selector lever in “P” position.

Check parking pawl components. Refer to

AT-175.

NG

E

Repair or replace damaged parts.

H

OK

INSPECTION END

AT-97

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

7. In “N” Position, Vehicle Moves

SYMPTOM:

Vehicle moves forward or backward when selecting “N” position.

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to park/ neutral position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check park/neutral position

switch. Refer to AT-92.

Does self-diagnosis show damage to park/neutral position switch circuit?

No

H

Check control linkage. Refer to AT-115.

OK

NAT276

H

Check A/T fluid level again.

OK

H

1. Remove oil pan.

2. Check A/T fluid condition.

OK

NG

E

Adjust control linkage.

Refer to AT-115.

NG

E

Refill ATF.

NG

E

1. Disassemble A/T.

2. Check the following items:

I

Forward clutch assembly

I

Overrun clutch assembly

I

Reverse clutch assembly

SAT638A

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

SAT171B

AT-98

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

8. Large Shock. “N”

→

“R” Position

SYMPTOM:

There is large shock when changing from “N” to “R” position.

SAT831HA

Does self-diagnosis show damage to line pressure solenoid valve or throttle (accelerator) position sensor, A/T fluid temperature sensor circuit?

No

Yes

E

Check damaged circuit.

Refer to AT-60, AT-76 or

AT-84.

H

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN” (DTC 43)].

OK

NG

E

Repair or replace throttle

(accelerator) position sensor.

NAT262

Check line pressure at idle with selector lever in “D” position. Refer to “Line Pres-

sure Test”, AT-30.

H

OK

NG

E

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

SAT494G

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-99

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

9. Vehicle Does Not Creep Backward In “R”

Position

SYMPTOM:

Vehicle does not creep backward when selecting “R” position.

SAT638A

SAT493G

SAT494G

SAT171B

Check A/T fluid level again.

OK

NG

E

Refill ATF.

H

Check stall revolution with selector lever in “1” and “R” positions.

OK

OK in “1” position

H

NG in “R” position

1. Remove control valve

assembly. Refer to AT-113.

2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.

4. Check the following items:

I

Oil pump assembly

I

Torque converter

I

Reverse clutch assembly

I

High clutch assembly

NG in both “1” and “R” positions

E

H

1. Remove control valve

assembly. Refer to AT-113.

2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.

4. Check the following items:

I

Oil pump assembly

I

Torque converter

I

Reverse clutch assembly

I

High clutch assembly

I

Low & reverse brake assembly

I

Low one-way clutch

H

Check line pressure at idle with selector lever in “R” position. Refer to

“Line Pressure Test”, AT-30.

H

1. Remove oil pan.

2. Check A/T fluid condition.

H

NG

OK

OK

NG

E

1. Remove control valve

assembly. Refer to AT-113.

2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.

4. Check the following item:

I

Oil pump assembly

H

Check again.

H

OK

INSPECTION END

NG

E

1. Perform TCM input/output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-100

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

10. Vehicle Does Not Creep Forward In “D”, “2”

Or “1” Position

SYMPTOM:

Vehicle does not creep forward when selecting “D”, “2” or “1” position.

SAT638A

Check A/T fluid level again.

OK

NG

E

Refill ATF.

SAT493G

SAT494G

SAT171B

H

Check stall revolution with selector lever in

“D” position. Refer to “STALL TEST”, AT-27.

OK

H

Check line pressure at idle with selector lever in “D” position. Refer to “Line Pressure

Test”, AT-30.

OK NG

H

1. Remove control valve assembly.

Refer to AT-113.

2. Check the following items:

I

Valves to control line pressure

(Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.

4. Check the following item:

I

Oil pump assembly

NG

E

H

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot filter)

I

Line pressure solenoid valve

3. Disassemble A/T.

4. Check the following items:

I

Oil pump assembly

I

Forward clutch assembly

I

Forward one-way clutch

I

Low one-way clutch

I

Low & reverse brake assembly

I

Torque converter

NG

E q

H

1. Remove oil pan.

2. Check A/T fluid condition.

OK

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-101

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT832H

NAT262

SAT494G

SAT171B

11. Vehicle Cannot Be Started From D

1

SYMPTOM:

Vehicle cannot be started from D

1 on Cruise test — Part 1.

Is 9. Vehicle Does Not Creep Backward In

“R” Position OK?

Yes

No

E

Go to 9. Vehicle Does Not

Creep Backward In “R”

Position, AT-100.

H

Does self-diagnosis show damage to vehicle speed sensor

⋅

A/T (revolution sensor), shift solenoid valve A, B or vehicle speed sensor

⋅

MTR after cruise test?

Yes

E

Check damaged circuit.

Refer to AT-50, AT-54,

AT-63 or AT-66.

No

H

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN”].

NG

E

Repair or replace throttle

(accelerator) position sensor.

OK

H

Check line pressure at stall point with selector lever in “D” position. Refer to

“Line Pressure Test”, AT-30.

OK

H

1. Remove oil pan.

2. Check A/T fluid condition.

H

OK

1. Remove control valve assembly. Refer

to AT-113.

2. Check the following items:

I

Shift valve A

I

Shift valve B

I

Shift solenoid valve A

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

F

H

OK

Check again.

OK

H

INSPECTION END

NG

E

NG

E

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Shift valve A

I

Shift valve B

I

Shift solenoid valve A

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.

4. Check the following items:

I

Forward clutch assembly

I

Forward one-way clutch

I

Low one-way clutch

I

High clutch assembly

I

Torque converter

I

Oil pump assembly

OK

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-102

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

NAT262

SAT171B

12. A/T Does Not Shift: D

1

Kickdown: D

4

→

D

2

SYMPTOM:

→

D

2

Or Does Not

A/T does not shift from D

1

A/T does not shift from D

4 to D to D

2

2 at the specified speed.

when depressing accelerator pedal fully at the specified speed.

Are 10. Vehicle Does Not Creep Forward

In “D”, “2” Or “1” Position and 11. Vehicle

Cannot Be Started From D

1

OK?

Yes

H

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to park/ neutral position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

No

E

Go to 10. Vehicle Does

Not Creep Forward In “D”,

“2” Or “1” Position and 11.

Vehicle Cannot Be Started

From D

1

, AT-101, AT-102.

Yes

E

Check park/neutral position

switch. Refer to AT-92.

Does self-diagnosis show damage to park/neutral position switch circuit?

H

No

Check vehicle speed sensor

⋅

A/T (revolution sensor) and vehicle speed sensor

⋅

MTR. Refer to AT-50, AT-54.

OK

NG

E

Repair or replace vehicle speed sensor

⋅

A/T (revolution sensor) and vehicle speed sensor

⋅

MTR. Refer

to AT-50, AT-54.

H

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN” (DTC 43)].

H

OK

1. Remove oil pan.

2. Check A/T fluid condition.

OK

H

1. Remove control valve. Refer to AT-113.

2. Check the following items:

I

Shift valve A

I

Shift solenoid valve A

I

Pilot valve

I

Pilot filter

F

OK

Check again.

OK

H

INSPECTION END

NG

NG

OK

E

E

Repair or replace throttle

(accelerator) position sensor.

1. Remove control valve.

Refer to AT-113.

2. Check the following items:

I

Shift valve A

I

Shift solenoid valve A

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.

4. Check the following items:

I

Servo piston assembly

I

Brake band

I

Oil pump assembly

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-103

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

13. A/T Does Not Shift: D

2

→

D

3

SYMPTOM:

A/T does not shift from D

2 to D

3 at the specified speed.

Are 10. Vehicle Does Not Creep Forward

In “D”, “2” Or “1” Position and 11. Vehicle

Cannot Be Started From D

1

OK?

Yes

No

E

Go to 10. Vehicle Does

Not Creep Forward In “D”,

“2” Or “1” Position and 11.

Vehicle Cannot Be Started

From D

1

, AT-101, AT-102.

H

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to park/ neutral position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check park/neutral position

switch. Refer to AT-92.

NAT262

SAT171B

Does self-diagnosis show damage to park/neutral position switch circuit?

No

H

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN”].

OK

H

1. Remove oil pan.

2. Check A/T fluid condition.

H

OK

1. Remove control valve assembly. Refer

to AT-113.

2. Check the following items:

I

Shift valve B

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

F

OK

NG

E

Repair or replace throttle

(accelerator) position sensor.

NG

E

OK

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Shift valve B

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.

4. Check the following items:

I

Servo piston assembly

I

High clutch assembly

I

Oil pump assembly

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-104

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT833HA

NAT262

SAT171B

14. A/T Does Not Shift: D

3

→

D

4

SYMPTOM:

I

A/T does not shift from D

3

I

A/T must be warm before D

3 to D

4 to D at the specified speed.

4 shift will occur.

Are 10. Vehicle Does Not Creep Forward

In “D”, “2” Or “1” Position and 11. Vehicle

Cannot Be Started From D

1

OK?

Yes

No

E

Go to 10. Vehicle Does

Not Creep Forward In “D”,

“2” Or “1” Position and 11.

Vehicle Cannot Be Started

From D

1

, AT-101, AT-102.

H

Does self-diagnosis, after cruise test, show damage to any of the following circuits?

I

Park/neutral position switch

I

Overdrive control switch

I

A/T fluid temperature sensor

I

Vehicle speed sensor

⋅

A/T (Revolution sensor)

I

Shift solenoid valve A or B

I

Vehicle speed sensor

⋅

MTR

Yes

E

Check damaged circuit.

Refer to AT-50, AT-54,

AT-63, AT-66 or AT-88.

H

No

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN”].

NG

E

Repair or replace throttle

(accelerator) position sensor.

H

OK

1. Remove oil pan.

2. Check A/T fluid condition.

OK

H

1. Remove control valve assembly. Refer

to AT-113.

2. Check the following items:

I

Shift valve B

I

Overrun clutch control valve

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

OK

F

NG

E

OK

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Shift valve B

I

Overrun clutch control valve

I

Shift solenoid valve B

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.

4. Check the following items:

I

Servo piston assembly

I

Brake band

I

Torque converter

I

Oil pump assembly

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-105

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

15. A/T Does Not Perform Lock-up

SYMPTOM:

A/T does not perform lock-up at the specified speed.

Does self-diagnosis show damage to torque converter clutch solenoid valve after cruise test?

No

Yes

E

Check torque converter clutch solenoid valve.

Refer to AT-72.

SAT844H

NAT262

H

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN”].

OK

H

1. Remove control valve. Refer to AT-113.

2. Check following items:

I

Torque converter clutch control valve

I

Torque converter relief valve

I

Torque converter clutch solenoid valve

I

Pilot valve

I

Pilot filter

OK

NG

E

Repair or replace throttle

(accelerator) position sensor.

NG

E

Repair or replace damaged parts.

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-106

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

16. A/T Does Not Hold Lock-up Condition

SYMPTOM:

A/T does not hold lock-up condition for more than 36 seconds.

SAT835H

SAT171B

Does self-diagnosis show damage to engine speed signal circuit after cruise test?

No

H

1. Remove oil pan.

2. Check A/T fluid condition.

H

OK

1. Remove control valve assembly. Refer

to AT-113.

2. Check the following items:

I

Torque converter clutch control valve

I

Pilot valve

I

Pilot filter

F

H

OK

Check again.

OK

H

INSPECTION END

Yes

E

Check engine speed sig-

nal. Refer to AT-80.

NG

E

OK

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Torque converter clutch control valve

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.

4. Check torque converter and oil pump assembly.

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

SAT146BA

17. Lock-up Is Not Released

SYMPTOM:

Lock-up is not released when accelerator pedal is released.

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to closed throttle position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check closed throttle posi-

tion switch. Refer to AT-88.

Does self-diagnosis show damage to closed throttle position switch circuit?

H

No

Check again.

H

OK

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-107

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

18. Engine Speed Does Not Return To Idle

(Light Braking D

4

→

D

3

)

SYMPTOM:

I

Engine speed does not smoothly return to idle when A/T shifts from D

4 to D

3

.

I

Vehicle does not decelerate by engine brake when turning overdrive control switch OFF.

I

Vehicle does not decelerate by engine brake when shifting

A/T from “D” to “2” position.

YAT338

NAT262

SAT171B

Does self-diagnosis show damage to overrun clutch solenoid valve circuit after cruise test?

No

H

Check throttle (accelerator) position sensor. Refer to EC section [TROUBLE

DIAGNOSIS FOR “THROTTLE (ACCEL)

POSI SEN”].

OK

H

1. Remove oil pan.

2. Check A/T fluid condition.

OK

H

1. Remove control valve assembly. Refer

to AT-113.

2. Check the following items:

I

Overrun clutch control valve

I

Overrun clutch reducing valve

I

Overrun clutch solenoid valve

OK

F

Yes

E

Check overrun clutch sole-

noid valve. Refer to AT-69.

NG

E

Repair or replace throttle

(accelerator) position sensor.

NG

E

OK

1. Remove control valve assembly. Refer to

AT-113.

2. Check the following items:

I

Overrun clutch control valve

I

Overrun clutch reducing valve

I

Overrun clutch solenoid valve

3. Disassemble A/T.

4. Check the following items:

I

Overrun clutch assembly

I

Oil pump assembly

Check again.

OK

H

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-108

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

19. Vehicle Does Not Start From D

1

SYMPTOM:

Vehicle does not start from D

1 on Cruise test — Part 2.

SAT832H

Does self-diagnosis show damage to vehicle speed sensor

⋅

A/T (revolution sensor), shift solenoid valve A, B or vehicle speed sensor

⋅

MTR after cruise test?

No

Yes

E

Check damaged circuit.

Refer to AT-50, AT-54,

AT-63 or AT-66.

Check again.

OK

H

Go to 11. Vehicle Cannot Be Started From

D

1

, AT-102.

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-109

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

20. A/T Does Not Shift: D

2

→

D

1

When

Depressing Accelerator Pedal

SYMPTOM:

A/T does not shift from D

2 to D

1 when depressing accelerator pedal fully at the specified speed.

Are 9. Vehicle Does Not Creep

Backward In “R” Position and 10.

Vehicle Does Not Creep Forward In

“D”, “2” Or “1” Position OK?

No

E

Go to 9. Vehicle Does Not

Creep Backward In “R” Position and 10. Vehicle Does Not Creep

Forward In “D”, “2” Or “1”

Position, AT-100, AT-101.

H

Yes

Does “ECU INPUT SIGNAL” show damage to park/neutral position switch circuit?

----------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------

Yes

E

Check park/neutral position

switch. Refer to AT-88.

NAT262

SAT171B

Does self-diagnosis show damage to park/neutral position switch circuit?

H

No

Check vehicle speed sensor

⋅

A/T

(revolution sensor) and vehicle speed sensor

⋅

MTR. Refer to AT-50,

AT-54.

H

OK

Check throttle (accelerator) position sensor. Refer to EC section

[TROUBLE DIAGNOSIS FOR

“THROTTLE (ACCEL) POSI SEN”

(DTC 43)].

H

OK

1. Remove oil pan.

2. Check A/T fluid condition.

H

OK

1. Remove control valve. Refer to

AT-113.

2. Check the following items:

I

Shift valve A

I

Shift solenoid valve A

I

Pilot valve

I

Pilot filter

H

F

OK

Check again.

OK

H

INSPECTION END

NG

E

Repair or replace vehicle speed sensor

⋅

A/T (revolution sensor) and vehicle speed sensor

⋅

MTR.

NG

E

Repair or replace throttle (accelerator) position sensor.

NG

E

OK

1. Remove control valve. Refer

to AT-113.

2. Check the following items:

I

Shift valve A

I

Shift solenoid valve A

I

Pilot valve

I

Pilot filter

3. Disassemble A/T.

4. Check the following items:

I

Servo piston assembly

I

Brake band

I

Oil pump assembly

NG

E

1. Perform TCM input/output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-110

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

21. A/T Does Not Shift: D

4

→

D

3

, When

Overdrive Control Switch “ON”

→

“OFF”

SYMPTOM:

A/T does not shift from D

4 to D control switch to “OFF” position.

3 when changing overdrive

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to overdrive control switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check overdrive control switch circuit. Refer to

AT-92.

Does self-diagnosis show damage to overdrive control switch circuit?

No

H

Go to 13. A/T Does Not Shift:

D

2

, D

3

, AT-104.

SAT146BA

22. A/T Does Not Shift: D

3

Lever “D”

→

“2” Position

→

2

2

, When Selector

SYMPTOM:

A/T does not shift from D

3 from “D” to “2” position.

to 2

2 when changing selector lever

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to park/ neutral position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check park/neutral position switch circuit. Refer to

AT-92.

Does self-diagnosis show damage to park/neutral position switch circuit?

No

H

Go to 12. A/T Does Not Shift: D

1

Does Not Kickdown: D

4

, D

2

, D

, AT-103.

2

Or

AT-111

DIAGNOSTIC PROCEDURES FOR SYMPTOMS

SAT146BA

23. A/T Does Not Shift: 2

2

Lever “2”

→

“1” Position

→

1

1

, When Selector

SYMPTOM:

A/T does not shift from 2

2 from “2” to “1” position.

to 1

1 when changing selector lever

Does “ECU INPUT SIGNALS” in

Data Monitor show damage to park/ neutral position switch circuit?

----------------------------------------------------------------------------------------------------------------------- OR -----------------------------------------------------------------------------------------------------------------------

Yes

E

Check park/neutral position switch circuit. Refer to

AT-92.

Does self-diagnosis show damage to park/neutral position switch circuit?

H

No

Check again.

H

OK

INSPECTION END

NG

E

1. Perform TCM input/ output signal inspection.

2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

SAT778B

24. Vehicle Does Not Decelerate By Engine

Brake

SYMPTOM:

Vehicle does not decelerate by engine brake when shifting from 2

2

(1

2

) to 1

1

.

Is 9. Vehicle Does Not Creep Backward In

“R” Position OK?

No

E

Go to 9. Vehicle Does Not

Creep Backward In “R”

Position, AT-100.

Yes

H

Go to 18. Engine Speed Does Not Return

To Idle (Light Braking D

4

,

D

3

), AT-108.

AT-112