C0362

Circuit Description
The 4WD LO circuit is used to inform the PCM/VCM when the transfer case has been placed into 4WD LO mode. The PCM/VCM supplies the circuit with a 12 V signal. When the transfer case is placed into 4WD LO, the transfer case shift control module pulls the 12 V signal low which is then sensed by the PCM/VCM.
This DTC detects an internal module fault or a short to voltage on the 4WD LO signal feed circuit.

Conditions for Setting the DTC
^ After the system turns the output on, (grounding the 4WD LO Signal Feed Circuit), and reads back a high voltage, the DTC is set. The system will not attempt it again during that ignition cycle.
^ The transfer case shift control module reads back a high voltage when a low voltage is expected on the 4WD LO Signal Feed Circuit.

Action Taken When the DTC Sets
^ May affect the transmission shift points.
^ The SERVICE indicator (AWD/4WD) 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 exits.
^ A history DTC will clear after 100 consecutive ignition cycles 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 4WD LO circuit for voltage.
3. Tests the 4WD LO circuit for a short to voltage.
4. Tests the 4WD LO circuit for an open or high resistance.
5. Repairs the 4WD LO circuit for a short to voltage.