Fail-Safe Table
This function is provided by the safe mechanism that assures safe driveability even when the coupling assembly, switch, sensor or its circuit fails. The following table shows the fail safe function for each fail condition of sensor, coupling assembly, switch, 4WD control module or its circuit.
FAIL-SAFE TABLE
| DTC No. | Trouble Area | Fail-Safe Operation |
|---|---|---|
| C1240 | 4WD control module power supply circuit malfunction | 4WD control module controls the current and fixed the vehicle to 2WD position. |
| C1243 | Internal circuit malfunction of 4WD control module | |
| C1250 | Coupling air temperature sensor open | |
| C1251 | Coupling air temperature sensor short | |
| C1252 | Coupling assembly open | |
| C1253 | Coupling assembly short | |
| C1254 | 2WD/4WD switch malfunction | |
| U0073 | Control module communication bus off | |
| U0100 | Lost communication with ECM | |
| U0101 | Lost communication with TCM | |
| U0121 | Lost communication with ABS/ESP® control module | |
| U0155 | Lost communication with instrument panel cluster (IPC) control module |