NVG 263-NP1 (Selectable)

DTC C0367





Test 1-9

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 a Permanent Magnetic (PM) motor, a worm gear controlled plunger, a front axle switch and an electronic control circuit all within the actuator assembly.
The front axle actuator has four circuits connected to the actuator:
^ Ignition 3 voltage circuit
^ Ground circuit
^ Axle actuator control circuit
^ Axle switch signal circuit
Whenever a shift to 4HI, or 4LO is 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 V on the axle actuator control circuit.

Conditions for Setting the DTC
^ The system will try to engage the front axle. If it cannot engage the front axle, the system will not attempt it 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.
^ SERVICE 4WD indicator lamp 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 no longer exists.
^ 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.