Allison Transmission OEM Troubleshooting guide for WT trouble codes
below is if/than tree for found codes
http://westernstatestransmissions.com/ht...e2.html#23
OEM TROUBLESHOOTING GUIDE
FOR ALLISON WT TROUBLE CODES
TROUBLESHOOTING WITH DIAGNOSTIC CODES
(Additional troubleshooting information can be found in the appropriate
Allison Troubleshooting Manual.)
CODE LISTINGS AND PROCEDURES |
IF CODES READ |
RECOMMENDED PROCEDURES |
Main
Code |
Sub
Code |
|
| 13 |
12 |
1. Check:
a. Battery direct ground and power connections are tight and clean.
b. Vehicle batteries are charged.
c. Vehicle charging system is not over- or under - charging.
d. VIM fuse is good.
e. VIM connections are tight, clean, and undamaged.
f. Vehicle manufacturer supplied wiring is correct.
g. ECU connectors are tight, clean and undamaged.
2. If all points check, call Western States Converters and Transmissions. |
ECU Input
Voltage Low |
|
13 |
13 |
ECU Input
Voltage Low
(Medium) |
|
13 |
23 |
ECU Input Voltage High |
| 14 |
12, 23 |
1. Check:
a. Is transmission equipped with oil level sensor?
b. Engine speed sensor, output speed sensor, temperature sensor, and oil level sensor are working correctly.
c. Wiring harness has no opens, shorts to ground, or shorts to battery.
2. If all points check, call Western States Transmissions and Converters. |
Oil Level Sensor |
21 |
12, 23 |
1. Check:
a. TPS connector is properly connected.
b. End of TPS cable is pulled out properly.
c. Engine fuel lever is in idle position.
d. Engine fuel lever provides proper amount of stroke on TPS cable.
e. Wiring harness to TPS has no opens, shorts between wires, or shorts to ground.
2. If able, replace TPS.
3. If all points check, call Western States Converters and Transmissions. |
Throttle Position Sensor |
22 |
14, 15, 16 |
1. Check:
a. Speed sensor connectors are tight, clean and undamaged.
b. Speed sensor mounting bolts are properly torqued (24-29 N.m (18-21 lb ft))
c. Wiring harness to sensors has no opens, shorts between wires, or shorts to ground.
2. If all points check, call Western States Converters and Transmissions. |
Speed Sensors |
23 |
12, 13, 14, 15 |
1. Check:
a. ECU connectors are tight, clean, and undamaged.
b. Remote shift selector connector is tight and jumper wire is cut.
c. Wiring harness on remote has no opens, shorts between wires, or shorts to ground.
2. If able, replace shift selector(s).
3. If all points check, call Western States Converters and Transmissions. |
Shift Selectors |
24 |
12 |
1. Check:
a. Air temperature is below -32°C (-25°F).
1) If yes, this is a correct response for temperature.
2) If no, check that main transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
2. If all points check, call Western States Transmissions and Converters. |
Sump Oil Temperature Cold |
24 |
23 |
1. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
1) If fluid level is incorrect -- correct fluid level.
2) If fluid level is correct -- check for engine system overheating, causing transmission to overheat.
b. ECU connectors are tight, clean, and undamaged.
2. Check if ECU and transmission connectors are tight, clean, and undamaged.
3. If all points check, call Western States Converters and Transmissions. |
Sump Oil Temperature Hot |
25 |
00, 11, 22, 33, 44, 55, 66, 77 |
1. Check:
a. Speed sensor connector is tight, clean and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Fluid level is correct.
d. Sensor mounting bolt torque is correct (24-29 N.m (18-21 lb ft)).
e. Wiring harness to sensor has no opens, shorts between wires, or shorts to ground.
2. If all points check, call Western States Converters and Transmissions. |
Output Speed Sensor and Reading |
32 |
00, 33, 55, 77 |
1. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
2. Check:
a. Main transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Wiring harness has no opens, shorts between wires, or shorts to ground.
3. If all points check, call Western States Converters and Transmissions. |
C3 Pressure Switch Open |
33 |
12, 23 |
1. Check:
a. Main transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Wiring harness has no opens, shorts between wires, or shorts to ground.
2. If all points check, call Western States Converters and Transmissions. |
Sump Oil Sensor Failure |
34 |
12, 13, 14, 15, 16 |
1. If able, recalibrate ECU; if not, replace ECU.
2. If unable to replace ECU, call Western States Converters and Transmissions. |
EEPROM |
35 |
00, 16 |
1. Check:
a. ECU connectors are tight, clean, and undamaged.
b. VIM connectors are tight, clean, and undamaged.
c. Vehicle manufacturer supplied wiring has correct power and ground connections.
d. Power connections are battery direct.
e. Ground connections are battery direct.
f. Ignition switch connections are correct.
2. If all points check, call Western States Converters and Transmissions. |
Power Interruption EEPROM Write Interruption |
3 |
00 |
1. If able, reprogram ECU.
2. If able, replace ECU.
3. If ECU cannot be reprogrammed or replaced, call Western States Converters and Transmissions. |
Hardware / Software Not Compatible |
41 |
12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26 |
1. Check:
a. Main transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Wiring harness is not pulled too tight, and there is no damage, chafing, or screws through harness.
d. Wiring harness has no opens, shorts between wires, or shorts to ground.
2. Change wiring harness (optional).
3. If all points check, call Western States Converters and Transmissions. |
Open or Short to Ground in Solenoid Circuit |
42 |
12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26 |
1. Check:
a. Main transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Wiring harness is not pulled too tight, and there is no damage, chafing, or screws through harness.
d. Wiring harness has no opens, shorts between wires, or shorts to ground.
e. Unauthorized repairs have not been made.
2. Change harness (optional).
3. If all points check, call Western States Converters and Transmissions. |
Short to Battery in Solenoid Circuit |
43 |
21, 25, 26 |
1. Check:
a. Transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight clean, and undamaged.
c. Wiring harness has no opens, shorts between wires, or shorts to ground.
2. If able, replace ECU.
3. If all points check, call Western States Converters and Transmissions. |
Solenoid Low Side Circuit, Open Driver, or Wire Shorted to Ground |
44 |
12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26 |
1. Check:
a. Transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Wiring harness has no opens, shorts between wires, or shorts to ground.
2. If all points check, call Western States Converters and Transmissions. |
Solenoid Circuit Short to Ground |
45 |
12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26 |
1. Check:
a. Transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. Wiring harness has no opens.
2. If all points check, call Western States Converters and Transmissions. |
Solenoid Circuit Open |
|
51 |
01, 10, 12, 21, 23, 24, 35, 42, 43, 45, 46, 53, 64, 65 |
1. Check:
a. Output and turbine speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no opens, shorts between wires, or shorts to ground.
2. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
3. If all points check, call Western States Converters and Transmissions. |
Offgoing Ratio Test (During Shift) |
52 |
01, 08, 32, 34, 54, 56, 71, 72, 78, 79, 99 |
1. Check:
a. Output and turbine speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no opens, shorts between wires or shorts to ground.
c. Main wiring harness to transmission has no shorts between wires, or shorts to ground.
2. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level.
Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
3. If all points check, call Western States Converters and Transmissions. |
Offgoing C3 Pressure Switch (During Shift) |
53 |
08, 18, 28, 29, 38, 39, 48, 49, 58, 59, 68, 69, 78, 99 |
1. Check:
a. Turbine and engine speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no opens, shorts between wires, or shorts to ground.
2. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid Level is correct.
3. If all points check, call Western States Converters and Transmissions. |
Offgoing Speed Test (During Shift) |
|
54 |
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, 85, 86, 92, 93, 95, 96, 97 |
1. Check:
a. Turbine and output speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no opens, shorts between wires, or shorts to ground.
2. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
3. EEPROM calibration is correct for the transmission.
2. If all points check, call Western States Converters and Transmissions. |
Oncoming Ratio Test (After Shift) |
55 |
17, 27, 87, 97 |
1. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
2. Check:
a. Output and turbine speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no opens, shorts between wires, or shorts to ground.
3. Check:
a. Transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. C3 pressure switch wiring has no opens, shorts between wires, or shorts to ground.
4. If all points check, call Western States Converters and Transmissions. |
Oncoming C3 Pressure Switch (After Shift) |
56 |
00, 11, 22, 33, 44, 55, 66, 77 |
1. Check:
a. Turbine and output speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no opens, shorts between wires, or shorts to ground.
c. Transmission connector is tight, clean, and undamaged.
d. ECU connectors are tight, clean, and undamaged.
2. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
3. If all points check, call Western States Converters and Transmissions. |
Range Verification Test (Between Shifts) |
57 |
11,22,44,
66,88,99 |
1. Let vehicle idle with parking brake applied, wheels chocked, and vehicle level. Check:
a. Correct dipstick is installed.
b. Fluid level is correct.
2. Check:
a. Output and turbine speed sensor connectors are tight, clean, and undamaged.
b. Speed sensor wiring harness has no shorts between wires or shorts to ground.
3. Check:
a. Transmission connector is tight, clean, and undamaged.
b. ECU connectors are tight, clean, and undamaged.
c. C3 Pressure switch wiring has no opens, shorts between wires, or shorts to ground.
4. If all points check, call Western States Converters and Transmissions. |
Range Verification Test (C3) |
61 |
00 |
1. Check:
a. Fluid level is correct.
b. Retarder apply system is not allowing retarder and throttle to be applied at the same time.
c. Fluid cooler is adequately sized for load.
2. If all points check, call Western States Converters and Transmissions. |
Retarder Over Temperature |
62 |
12, 23 |
1. Check:
a. Retarder temperature measured with DDR is consistent with code; or determine if code is active using shift selector.
b. Ambient temperature is above 178°C (352°F) or below -45°C (-49°F).
c. Sensor connector it tight, clean, and undamaged.
d. ECU connectors are tight, clean, and undamaged.
e. Temperature sensor circuit has no opens, shorts, or shorts to ground.
2. If all points check, call Western States Transmissions and Converters. |
Retarder Temperature Sensor |
63 |
00, 26, 40 |
1. Check input wiring, switches, and connectors to determine why input states are different.
2. If all points check, call Western States Converters and Transmissions. |
Input Function Fault |
64 |
12, 23 |
1. Use DDR to read retarder counts and identify problem wires. Check wiring for short to battery, ground wire open, or short to ground.
2. If all points check, call Western States Converters and Transmissions. |
Retarder Modulation Request Device Fault |
65 |
00 |
1. Check if engine rating or governor speed is too high for transmission.
2. If all points check, call Western States Converters and Transmissions. |
Engine Rating High (Computer-Controlled Engines Only) |
66 |
00 |
1. Check:
a. Serial connection to engine computer is tight, clean, and undamaged.
b. SCI wiring harness has no opens, shorts, or shorts to ground.
c. If DDR is not available, also be sure that transmission ECU connections are tight, clean, and undamaged.
2. If all points check, call Western States Converters and Transmissions. |
Serial Communications Interface Fault |
69 |
12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26, 32, 33, 34, 35, 36, 41 |
1. Clear diagnostic code and retry vehicle start.
2. If code recurs, reprogram ECU.
3. If able, replace ECU.
4. If code continues to recur, call Western States Converters and Transmissions. |
| ECU Malfunction |
224 Jason Crt.
Corona, CA 91719
(951) 279-6393
(888) 463-3499
(951) 279-1847 Fax
--- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor" wrote:
>
> This has a guide to clear "do not shift" may not apply to the '90 pt
> but may be use full for later models. ? I think WT is ack for "WOrld
> Transmission"
>
> http://westernstatestransmissions.com/ht...uble1.html
>
> Greg
>
|
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Allison Transmission OEM Troubleshooting guide for WT trouble codes
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