NVG 263-NP1 (Selectable)

DTC C0367


Circuit Description
The front axle control circuit consists of an electric motor actuator, which engages and disengages the front axle. The front axle actuator's motor consists of the following components within the actuator assembly:
^ A Permanent Magnetic (PM) motor
^ A worn gear controlled plunger
^ A front axle switch
^ An electronic control circuit
The front axle actuator has 4 circuits connected to the actuator:
^ The ignition 3 voltage circuit
^ The ground circuit
^ The axle actuator control circuit
^ The axle switch signal circuit
Whenever a shift to 4HI, or 4LO IE; requested, the transfer case shift control module engages the front axle by grounding the axle actuator control circuit through a current limiting driver. This DTC detects a shorted actuator, or a short to 12 volt on the axle actuator control circuit.

Conditions for Setting the DTC
^ The system will try to engage the front axle. If the system cannot engage the front axle, the system will not attempt the procedure 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 mode will be disabled.
^ The SERVICE 4WD indicator lamp will be commanded 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. This step tests the operation of the front axle switch.
3. This step tests the electrical control of the front axle switch.
4. This step tests the axle actuator control circuit for a short to voltage.
5. This step inspects for poor connections at the front axle actuator.
6. This step inspects for poor connections at the harness connector, of the transfer case shift control module.