NVG 126-NP4 Transfer Case

DTC C0374





Test 1-5





Test 6-11

Circuit Description
The transfer case shift control module senses rear slip. After several attempts of applying torque to the front wheels by activating the encoder motor, the transfer case still sees a difference in speed between the front propshaft speed sensor and rear propshaft speed sensor.

Conditions for Setting the DTC
The transfer case shift control module is unable to correct sensed wheel slip for 10 consecutive seconds.

Conditions for Clearing the DTC
^ A history DTC will clear after 100 consecutive ignition cycles without a fault present.
^ Use a scan tool in order to clear history and current DTCs.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if the rear propshaft speed sensor and wiring are operating properly.
3. This step determines if the front propshaft speed sensor and wiring are operating properly.
4. This step determines if the motor control A or motor control B circuits are shorted to ground within the encoder motor.
5. This step tests the integrity of the motor windings.
6. This step tests the motor control A and motor control B circuits for an open, short to ground, or high resistance between the encoder motor and the transfer case shift control module.
7. This step determines whether the transfer case is mechanically functioning properly.