Conditions for Setting the DTC
- The transfer case shift control module monitors the state of the rear axle differential lock actuator. The transfer case shift control module reads the rear differential lock control, and the rear differential lock return circuits for a high and low voltage. The DTC will set if these circuits are high when a low voltage is expected or when the circuits are low when a high voltage is expected.
- The DTC will set if this circuit is high when a low voltage is present or when the circuit is low when a high voltage is present.