WTEC III SHIFT SELECTOR OPERATION AND CODE MANUAL
P.O. Box 894, Speed Code PF3
Indianapolis, Indiana 46206-0894
www.allisontransmission.com
Oil level information, diagnostic codes
and prognostic features for
SA7297EN (2012/12) Litho in U.S.A.
ISO/QS 9000 and ISO 14001 Certified
3000/4000 Series
Allison transmissions
WTEC III (3rd Generation) Electronic Controls Shift Selectors
The Allison Advantage
WTEC III Electronic Controls Shift Selectors
Your Allison Automatic is fully electronically controlled. The Allison
electronic controls package oversees the operation of the transmission,
controlling transmission upshifts and downshifts, and providing
important information on the operation of your drive system.
Mode
Button
Label
Through readouts on your shift selector, you will be able to monitor
transmission oil levels, read diagnostic codes and prognostic information.
This brochure will help you understand shift selector readouts and enjoy
long, trouble-free operation of your Allison Automatic.
Mode
Indicator
(LED)
Mode
button
General Information
Mode
Button
Label
Fluid levels
The transmission fluid cools, lubricates and transmits hydraulic power,
so it is important the proper fluid level be maintained at all times. If the
fluid level is too low, the converter and clutches do not receive an adequate supply of fluids. If the fluid level is too high, the fluid can aerate
causing the transmission to shift erratically or overheat.
digital
display
DIAGNOSTICs
button
pushbutton
lever
Diagnostics
The Transmission Control Module (TCM) of your Allison Automatic
monitors the transmission’s electronic controls; and when a problem
condition is detected, it:
– Restricts shifting
Vehicle manufacturers may choose different types of shift selectors for their
vehicles. The shift selector in your Allison-equipped vehicle will be similar to
one of the pushbutton or lever styles as shown above.
– Illuminates the CHECK TRANS* light on the instrument panel
– Registers a diagnostic code
Continued illumination of the CHECK TRANS light during vehicle
operation (other than start-up) indicates that the TCM has signaled
a diagnostic code.
mode button
Allison Automatics offer primary and secondary shift
schedule modes to enhance performance or fuel
economy. The vehicle always defaults to the primary
mode (light off). You can switch to the secondary
mode (light on) by pushing the mode button.
* For some problems, diagnostic codes may be registered without the TCM
activating the CHECK TRANS light. Your Allison Transmission authorized service
2
outlet should be consulted whenever there is a transmission-related concern.
They have the equipment to check for diagnostic codes and to correct problems.
3
delayed fluid level check
Use the following procedure to display oil level information.
A delayed fluid level check for pushbutton and lever
selectors is indicated by a “–” in the display window
followed by a numerical countdown.
To
enter the oil level function:
1. P
ark the vehicle on a level surface, shift to N (Neutral)
and apply the parking brake.
2. U
sing a pushbutton shift selector, simultaneously
press the UP and DOWN arrow buttons one time.
WTEC III (3rd Generation) Electronic Controls Shift Selectors
Checking Fluid Levels
4. The shift selector displays the oil level data as follows:
•Correct Fluid Level – “oL” is displayed (“oL” represents “Fluid (Oil)
Level Check”) followed by “oK.” The “oK” display indicates the fluid
is within the correct fluid level zone. The sensor display and the
transmission dipstick may not agree exactly because the oil level
sensor compensates for fluid temperature.
Using a lever shift selector,
press the Diagnostics
button one time.
3. T
he fluid level reading may be delayed until the
following conditions are met:
– Engine is at idle.
– The fluid temperature is between 60˚C (140˚F) and
104˚C (220˚F).
– Transmission is in N (Neutral).
– The vehicle has been stationary for approximately
two minutes to allow the fluid to settle.
– The engine is at idle (below 1000 rpm – not “fast” idle).
4
• Low Fluid Level – “oL” is displayed (“oL” represents “Fluid (Oil) Level
Check”) followed by “Lo” (“Lo” represents “Low Oil Level”) and the
number of quarts the transmission fluid is low.
Example: oL Lo 2 “ 2” indicates that 2 additional quarts of fluid
will bring the fluid level within the middle of
the “oK” zone.
5
Example: oL HI 1 “ 1” indicates 1 quart of fluid above the full
transmission level.
• Invalid for Display – If any of the above conditions are not met,
the shift selector will display “oL” (“oL” represents “Fluid (Oil)
Level Check”) followed by “–” and a numerical display. The
numerical display is a fault code and indicates conditions are
not proper to receive the fluid level information, or that there
is a system malfunction.
The fault codes that may be encountered are shown below:
To exit the oil level function:
WTEC III (3rd Generation) Electronic Controls Shift Selectors
•High Fluid Level – “oL” is displayed (“oL” represents “Fluid (Oil)
Level Check”) followed by “HI” (“HI” represents “High
Oil Level”) and the number of quarts the transmission fluid
is overfilled.
Pushbutton selector:
Press the Neutral button or simultaneously press the Up and Down arrows two
times.
Lever selector:
Press the Diagnostics button two times or
momentarily move the shift selector to
any range and back to neutral.
Diagnostic Codes
To enter the diagnostic code function:
1. Bring the vehicle to a complete stop. Apply the parking brake.
Display
Fault CODE
Fluid Level
Fault Code Description
2. Using a pushbutton shift selector, simultaneously press the
UP and DOWN arrows two times.
o, L, –, 0, X*
Setting time too short
o, L, –, 5, 0
Engine speed too low
Using a lever shift selector, press
the Diagnostics button two times.
o, L, –, 5, 9
Engine speed too high
o, L, –, 6, 5
Neutral must be selected
o, L, –, 7, 0
Sump fluid temperature too low
o, L, –, 7, 9
Sump fluid temperature too high
o, L, –, 8, 9
Output speed high
o, L, –, 9, 5
Oil level sensor failed**
*A number between 8 and 1 that flashes during countdown period.
**Report sensor failure display to a distributor or dealer in your area.
Caution: A low or high fluid level can cause overheating and irregular
shift patterns. Incorrect fluid level can damage the transmission.
6
7
Diagnostic Transmission Codes
Diagnostic codes will appear one digit at a time on a lever or pushbutton
selector.
13
14
21
22
23
24
25
26
32
33
34
When the diagnostic function is entered, the first code (position d1 ) is
displayed as follows:
Example Code: 13 12
Code Position: d1 – indicates that this is the first diagnostic code listed
in the TCM memory.
Main Code: 13 - (two digits displayed one at a time) is listed first and
provides the general condition or area of a fault detected by the TCM.
Sub Code: 12 - (two digits displayed one at a time) is listed second and
provides specific areas or conditions within the main code that caused
the fault. This subcode indicates the problem is caused by low voltage.
For a detailed list of Diagnostic Transmission Codes for 3rd Generation
Shift Selectors, see pages 25 through 30.
To clear diagnostic codes:
Press and hold the MODE button for approximately three
seconds until the MODE INDICATOR (LED) flashes. Release the
MODE button and active indicators will not be illuminated.
To clear inactive codes, press and hold the MODE button for
10 seconds. Some codes are self-clearing and others require
ignition cycles to clear.
Be sure to record all codes displayed before they are cleared. This is essential
for troubleshooting. Begin operating as normal.
Drive the vehicle and check for code recurrence. If codes continue to
recur, bring the vehicle to an authorized Allison Transmission service
outlet to diagnose and repair the problem causing the codes.
8
MAIN CODE
SUB CODE
CODE
DESCRIPTION
12
13
23
12
23
12
23
14
15
16
12
13
14
15
16
12
23
00
11
22
33
44
55
66
77
00
11
00
33
55
77
12
23
12
13
14
15
ECU INPUT VOLTAGE LOW
ECU INPUT VOLTAGE MEDIUM LOW
ECU INPUT VOLTAGE HIGH
OIL LEVEL SENSOR, FAILED LOW
OIL LEVEL SENSOR, FAILED HIGH
THROTTLE POSITION SENSOR, FAILED LOW
THROTTLE POSITION SENSOR, FAILED HIGH
ENGINE SPEED SENSOR
TURBINE SPEED SENSOR
OUTPUT SPEED SENSOR
PRIMARY SHIFT SELECTOR FAULT
PRIMARY SHIFT SELECTOR MODE FAULT
SECONDARY SHIFT SELECTOR FAULT
SECONDARY SHIFT SELECTOR MODE FAULT
SHIFT SELECTOR DISPLAY LINE FAULT
SUMP FLUID TEMPERATURE, COLD
SUMP FLUID TEMPERATURE, HOT
OUTPUT SPEED SENSOR @ 0 RPM, LOW
OUTPUT SPEED SENSOR @ 0 RPM, 1ST
OUTPUT SPEED SENSOR @ 0 RPM, 2ND
OUTPUT SPEED SENSOR @ 0 RPM, 3RD
OUTPUT SPEED SENSOR @ 0 RPM, 4TH
OUTPUT SPEED SENSOR @ 0 RPM, 5TH
OUTPUT SPEED SENSOR @ 0 RPM, 6TH
OUTPUT SPEED SENSOR @ 0 RPM, REVERSE
THROTTLE SOURCE NOT DETECTED
ENGINE COOLANT SOURCE NOT DETECTED
C3 PRESSURE SWITCH OPEN IN LOW
C3 PRESSURE SWITCH OPEN IN 3RD
C3 PRESSURE SWITCH OPEN IN 5TH
C3 PRESSURE SWITCH OPEN IN REVERSE
SUMP OIL TEMPERATURE SENSOR, FAILED LOW
SUMP OIL TEMPERATURE SENSOR, FAILED HIGH
CALIBRATION COMPATIBILITY WRONG
CALIBRATION BLOCK CHECKSUM
POWER OFF BLOCK CHECKSUM
DIAGNOSE QUEUE BLOCK CHECKSUM
9
Diagnostic Transmission Main Codes 13–34
WTEC III (3rd Generation) Electronic Controls Shift Selectors
To read the digital display codes:
WTEC III (3rd Generation) Electronic Controls Shift Selectors
MAIN CODE
34
35
36
42
44
45
SUB CODE
CODE
DESCRIPTION
16
17
00
16
00
01
02
12
13
14
15
16
21
22
23
24
26
12
13
14
15
16
21
22
23
24
26
12
13
14
15
16
21
22
23
24
26
REAL TIME BLOCK CHECKSUM
CUSTOMER MODIFIABLE CONSTANTS CHECKSUM
POWER INTERRUPTION
REAL TIME WRITE INTERRUPTION
HARDWARE/SOFTWARE NOT COMPATIBLE
TID NOT COMPATIBLE W/HARDWARE/SOFTWARE
TID DID NOT COMPLETE
A SOLENOID SHORTED TO BATTERY
B SOLENOID SHORTED TO BATTERY
C SOLENOID SHORTED TO BATTERY
D SOLENOID SHORTED TO BATTERY
E SOLENOID SHORTED TO BATTERY
F SOLENOID SHORTED TO BATTERY
G SOLENOID SHORTED TO BATTERY
H SOLENOID SHORTED TO BATTERY
J SOLENOID SHORTED TO BATTERY
N SOLENOID SHORTED TO BATTERY
A SOLENOID SHORTED TO GROUND
B SOLENOID SHORTED TO GROUND
C SOLENOID SHORTED TO GROUND
D SOLENOID SHORTED TO GROUND
E SOLENOID SHORTED TO GROUND
F SOLENOID SHORTED TO GROUND
G SOLENOID SHORTED TO GROUND
H SOLENOID SHORTED TO GROUND
J SOLENOID SHORTED TO GROUND
N SOLENOID SHORTED TO GROUND
A SOLENOID CIRCUIT OPEN
B SOLENOID CIRCUIT OPEN
C SOLENOID CIRCUIT OPEN
D SOLENOID CIRCUIT OPEN
E SOLENOID CIRCUIT OPEN
F SOLENOID CIRCUIT OPEN
G SOLENOID CIRCUIT OPEN
H SOLENOID CIRCUIT OPEN
J SOLENOID CIRCUIT OPEN
N SOLENOID CIRCUIT OPEN
46
51
52
53
MAIN CODE
SUB CODE
CODE
DESCRIPTION
21
26
27
01
10
12
21
23
24
35
42
43
45
46
53
64
65
XY
01
08
32
34
54
56
71
72
78
99
XY
08
09
18
19
28
29
38
39
F SOLENOID CIRCUIT OVERCURRENT
N & H SOLENOID CIRCUIT OVERCURRENT
A-HI SOLENOID CIRCUIT OVERCURRENT
OFFGOING RATIO TEST, LOW TO 1
OFFGOING RATIO TEST, 1 TO LOW
OFFGOING RATIO TEST, 1 TO 2
OFFGOING RATIO TEST, 2 TO 1
OFFGOING RATIO TEST, 2 TO 3
OFFGOING RATIO TEST, 2 TO 4
OFFGOING RATIO TEST, 3 TO 5
OFFGOING RATIO TEST, 4 TO 2
OFFGOING RATIO TEST, 4 TO 3
OFFGOING RATIO TEST, 4 TO 5
OFFGOING RATIO TEST, 4 TO 6
OFFGOING RATIO TEST, 5 TO 3
OFFGOING RATIO TEST, 6 TO 4
OFFGOING RATIO TEST, 6 TO 5
OFFGOING RATIO TEST, X TO Y
OFFGOING C3PS TEST, LOW TO 1
OFFGOING C3PS TEST, LOW TO N1
OFFGOING C3PS TEST, 3 TO 2
OFFGOING C3PS TEST, 3 TO 4
OFFGOING C3PS TEST, 5 TO 4
OFFGOING C3PS TEST, 5 TO 6
OFFGOING C3PS TEST, REVERSE TO 1
OFFGOING C3PS TEST, REVERSE TO 2
OFFGOING C3PS TEST, REVERSE TO N1
OFFGOING C3PS TEST, N3 TO N2
OFFGOING C3PS TEST, X TO Y
OFFGOING SPEED TEST, LOW TO N1
OFFGOING SPEED TEST, L TO NNC
OFFGOING SPEED TEST, 1 TO N1
OFFGOING SPEED TEST, 1 TO RELS
OFFGOING SPEED TEST, 2 TO N1
OFFGOING SPEED TEST, 2 TO N2
OFFGOING SPEED TEST, 3 TO N1
OFFGOING SPEED TEST, 3 TO N3
11
Diagnostic Transmission Main Codes 46–53
10
Diagnostic Transmission Codes
WTEC III (3rd Generation) Electronic Controls Shift Selectors
Diagnostic Transmission Main Codes 34–45
Diagnostic Transmission Codes
WTEC III (3rd Generation) Electronic Controls Shift Selectors
MAIN CODE
53
54
SUB CODE
CODE
DESCRIPTION
MAIN CODE
48
49
58
59
68
69
78
99
XY
01
07
10
12
17
21
23
24
27
32
34
35
42
43
45
46
53
54
56
64
65
70
71
72
80
81
82
83
OFFGOING SPEED TEST, 4 TO N1
OFFGOING SPEED TEST, 4 TO N3
OFFGOING SPEED TEST, 5 TO N1
OFFGOING SPEED TEST, 5 TO N3
OFFGOING SPEED TEST, 6 TO N1
OFFGOING SPEED TEST, 6 TO N4
OFFGOING SPEED TEST, REVERSE TO N1
OFFGOING SPEED TEST, N2 TO N3 OR N3 TO N2
OFFGOING SPEED TEST, X TO Y
ONCOMING RATIO TEST, LOW TO 1
ONCOMING RATIO TEST, LOW TO REVERSE
ONCOMING RATIO TEST, 1 TO LOW
ONCOMING RATIO TEST, 1 TO 2
ONCOMING RATIO TEST, 1 TO REVERSE
ONCOMING RATIO TEST, 2 TO 1
ONCOMING RATIO TEST, 2 TO 3
ONCOMING RATIO TEST, 2 TO 4
ONCOMING RATIO TEST, 2 TO REVERSE
ONCOMING RATIO TEST, 3 TO 2
ONCOMING RATIO TEST, 3 TO 4
ONCOMING RATIO TEST, 3 TO 5
ONCOMING RATIO TEST, 4 TO 2
ONCOMING RATIO TEST, 4 TO 3
ONCOMING RATIO TEST, 4 TO 5
ONCOMING RATIO TEST, 4 TO 6
ONCOMING RATIO TEST, 5 TO 3
ONCOMING RATIO TEST, 5 TO 4
ONCOMING RATIO TEST, 5 TO 6
ONCOMING RATIO TEST, 6 TO 4
ONCOMING RATIO TEST, 6 TO 5
ONCOMING RATIO TEST, REV. TO LOW
ONCOMING RATIO TEST, REVERSE TO 1
ONCOMING RATIO TEST, REVERSE TO 2
ONCOMING RATIO TEST, N1 TO LOW
ONCOMING RATIO TEST, N1 TO 1
ONCOMING RATIO TEST, N1 TO 2
ONCOMING RATIO TEST, N1 TO 3
54
55
56
57
61
62
63
SUB CODE
CODE
DESCRIPTION
85
86
87
92
93
95
96
XY
07
17
27
87
97
XY
00
11
22
33
44
55
66
77
11
22
44
66
88
99
00
12
23
32
33
00
26
40
ONCOMING RATIO TEST, N1 TO 5
ONCOMING RATIO TEST, N1 TO 6
ONCOMING RATIO TEST, N1 TO REVERSE
ONCOMING RATIO TEST, N2 TO 2
ONCOMING RATIO TEST, N3 TO 3
ONCOMING RATIO TEST, N3 TO 5
ONCOMING RATIO TEST, N4 TO 6
ONCOMING RATIO TEST, X TO Y
ONCOMING C3PS TEST, LOW TO REVERSE
ONCOMING C3PS TEST, 1 TO REVERSE
ONCOMING C3PS TEST, 2 TO REVERSE
ONCOMING C3PS TEST, N1 TO REVERSE
ONCOMING C3PS TEST, NVL TO REVERSE
ONCOMING C3PS TEST, X TO Y
LOW RANGE VERIFICATION TEST
1ST RANGE VERIFICATION TEST
2ND RANGE VERIFICATION TEST
3RD RANGE VERIFICATION TEST
4TH RANGE VERIFICATION TEST
5TH RANGE VERIFICATION TEST
6TH RANGE VERIFICATION TEST
REVERSE RANGE VERIFICATION TEST
1ST RANGE VERIFICATION C3PS TEST
2ND RANGE VERIFICATION C3PS TEST
4TH RANGE VERIFICATION C3PS TEST
6TH RANGE VERIFICATION C3PS TEST
N1 RANGE VERIFICATION C3PS TEST
N2 OR N4 RANGE VERIFICATION C3PS TEST
RETARDER OIL TEMPERATURE, HOT
RETARDER TEMP. SENSOR, FAILED LOW
RETARDER TEMP. SENSOR, FAILED HIGH
ENGINE COOLANT TEMP. SENSOR, FAILED LOW
ENGINE COOLANT TEMP. SENSOR, FAILED HIGH
INPUT FUNCTION FAULT
KICKDOWN INPUT, FAILED ON
SERVICE BRAKE STATUS INPUT, FAILED ON
13
Diagnostic Transmission Main Codes 54–63
12
Diagnostic Transmission Codes
WTEC III (3rd Generation) Electronic Controls Shift Selectors
Diagnostic Transmission Main Codes 53–54
Diagnostic Transmission Codes
WTEC III (3rd Generation) Electronic Controls Shift Selectors
Diagnostic Transmission Main Codes 63–70
Diagnostic Transmission Codes
MAIN CODE
SUB CODE
63
41
47
64
12
23
65
00
11
12
66
00
11
22
33
34
69
27
28
29
33
34
35
36
39
41
42
43
70
12
13
14
CODE
DESCRIPTION
PUMP/PACK AND NEUTRAL GENERAL
PURPOSE INPUT
RELS INPUT, FAILED ON
RETARDER MODULATION SENSOR, FAILED LOW
RETARDER MODULATION SENSOR, FAILED HIGH
ENGINE RATING TOO HIGH
ENGINE NOT RESPONDING TO LRTP
TORQUE REDUCTION
ENGINE NOT RESPONDING TO DEFAULT
TRANSMISSION TORQUE LIMIT
SERIAL COMMUNICATION INTERFACE FAULT
S. C. I. ENGINE COOLANT SOURCE FAULT
J1939 RETARDER REQUEST FAULT
J1939 DRIVER DEMAND TORQUE FAULT
ENGINE NOT RESPONDING TO J1939
SEM CONTROL
A-HIGH SWITCH INOPERATIVE IN ECU
F-HIGH SWITCH INOPERATIVE IN ECU
N & H-HIGH SWITCH INOPERATIVE IN ECU
COMPUTER OPERATING PROPERLY TIMEOUT
IN ECU
ECU WRITE TIMEOUT
ECU CHECKSUM TEST
RAM SELF TEST IN ECU
COMMUNICATION CHIP ADDRESSING ERROR
I/O ASIC ADDRESSING TEST IN ECU
SPI OUTPUT FAILURE
SPI INPUT FAILURE
MINOR LOOP OVERRUN IN SOFTWARE
ILLEGAL WRITE TO ADDRESS $0000
MAJOR LOOP OVERRUN IN SOFTWARE
NOTE: Information contained in this brochure is designed to
give you an overview of the Oil Level Sensor, Diagnostics and
Prognostic Features on your Allison Automatic and is not intended
to replace your Operator’s Manual. Refer to your Operator’s
Manual for complete information on Diagnostic Codes, Prognostic
Features and Oil Level Sensor operation.
To order an Operator’s Manual,
go to www.allisontransmission.com
or call toll free: 888-666-5799
14
WTEC III SHIFT SELECTOR OPERATION AND CODE MANUAL
P.O. Box 894, Speed Code PF3
Indianapolis, Indiana 46206-0894
www.allisontransmission.com
Oil level information, diagnostic codes
and prognostic features for
SA7297EN (2012/12) Litho in U.S.A.
ISO/QS 9000 and ISO 14001 Certified
3000/4000 Series
Allison transmissions
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