Conditions for Setting the DTC

C0402 02 

Voltage is applied to the rear drive clutch solenoid valve. An error is detected if the current is greater than the current which corresponds to less than 2 Ω resistance in the solenoid valve.

C0402 04 

The measured current deviates from the nominal value with more than 200 mA for more than 100 ms.

C0402 42 and C0402 43 

The solenoid valve calibration values stored in the Rear Differential Clutch Control Module EEPROM are invalid or out of range.

C0402 4B 

There are no solenoid valve calibration values stored in the differential clutch control module EEPROM.

C0402 61 

An error is detected if the solenoid valve is not engaging adequately over a predetermined test sequence.