C0367

DTC C0367





Circuit Description
The front axle control circuit consists of a front drive axle clutch solenoid, which is electronically controlled by the transfer case shift control module. This solenoid opens and closes a vacuum control valve allowing vacuum to apply and release a clutch pack inside the front axle housing. The transfer case shift control module determines if the clutch pack has been applied, or released. This determination is based on a signal from the front axle switch, which is mounted on the front axle housing assembly. The front axle is normally locked, or engaged during AUTO 4WD, 4WD Hi, and 4WD LO modes. The front axle is unlocked or disengaged only during 2 HI or neutral modes.

Conditions for Setting the DTC
^ The system will try to engage the front axle. If the front axle can not engage the front axle, the system will not attempt to engage the front axle again during that ignition cycle.
^ The transfer case shift control module reads back the front axle output as a high voltage when a low voltage is expected.

Action Taken When the DTC Sets
^ All shifting for 4WD, AUTO 4WD, and 4WD LO modes will be disabled.
^ SERVICE 4WD indicator will be latched on for the remainder of the current ignition cycle.

Conditions for Clearing the DTC
^ The transfer case shift control module will clear the DTC if the condition for setting the DTC does not exist.
^ A history DTC will clear after 100 consecutive ignition cycle without a fault present.
^ History DTCs can be cleared using a scan tool.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Tests the operation of the front axle switch.
3. Tests the front axle control circuit for a short to voltage.
4. Helps determine whether the short to voltage is due to a faulty transfer case shift control module or wiring.