Fail-Safe Table
Precautions: Precautions for Diagnosing Trouble · Precautions for Driveline / Axle · General safety (00)
When any of the following DTCs is detected, 4WD control module enters the fail-safe mode as long as the failure condition associated with the DTC continues. The fail-safe mode is canceled when 4WD control module detects normal condition.
| DTC | DTC name | Fail-safe operation |
|---|---|---|
C1212 
|
ECM Mismatch | — |
| C1240
|
4WD Control Module Power Supply Circuit Malfunction | 4WD control module stops power supply to rear drive coupling unit. Vehicle operates as 2WD. |
| C1243
|
Internal Circuit Malfunction Of 4WD Control Module | Other than EEPROM error
•4WD control module stops power supply to rear drive coupling unit. Vehicle operates as 2WD.
|
| EEPROM error
•4WD control module performs control with fail-safe value.
|
||
| C1250
|
Coupling Air Temperature Sensor Open | 4WD control module stops power supply to rear drive coupling unit. Vehicle operates as 2WD. |
| C1251
|
Coupling Air Temperature Sensor Short | |
| C1252
|
Coupling Assembly Open | |
| C1253
|
Coupling Assembly Short | |
| C1260
|
Transfer Oil Temperature Sensor Open | |
| C1261
|
Transfer Oil Temperature Sensor Short | |
| C1270
|
CAN Invalid Data from BCM | 4WD control module does not accept request from BCM. |
| C1281
|
4WD Tire of Different Diameter Installed | 4WD control module stops power supply to rear drive coupling unit. Vehicle operates as 2WD. |
| C1282
|
4WD Abnormal Heat Generation | |
| U0073
|
Control Module Communication Bus Off | — |
| U0100
|
Lost Communication With ECM | 4WD control module performs control with fail-safe value. |
| U0101
|
Lost Communication With TCM | 4WD control module performs control with fail-safe value. |
| U0121
|
Lost Communication With ABS / ESP® Control Module | 4WD control module performs control with fail-safe value. |
| U0126
|
Lost Communication With Steering Angle Sensor | 4WD control module performs control with fail-safe value. |
| U0131
|
Lost Communication With Power Steering Control Module | 4WD control module performs control with fail-safe value. |
| U0140
|
Lost Communication With Body Control Module | 4WD control module performs control with fail-safe value. |
| U0155
|
Lost Communication With Instrument Panel Cluster (IPC) Control Module | 4WD control module performs control with fail-safe value. |
| U1082
|
Lost Communication With ENG A-STOP Control Module | 4WD control module performs control with fail-safe value. |