B3970

DTC B1017 OR B3970

CIRCUIT DESCRIPTION
The rear wiper motor is supplied battery positive voltage and ground. The liftgate control module controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the liftgate control module. The duty cycle of the pulse width modulation (PWM) determines the rear wiper motor operating mode.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC B1017 Output Driver Module Performance
- DTC B3970 Rear Wiper Motor Circuit

CONDITIONS FOR RUNNING THE DTC
Battery voltage must be between 9-16 volts.

CONDITIONS FOR SETTING THE DTC
The rear wiper motor control circuit is shorted to voltage.

ACTION TAKEN WHEN THE DTC SETS
The rear wiper/washer system will be disabled for as long as the DTC is current.

CONDITIONS FOR CLEARING THE DTC
- The DTC will be current for as long as the fault is present and it will be latched for the respective ignition cycle.
- A history DTC will be cleared after 100 error-free ignition cycles.

TEST

Step 1 - Step 13:

Step 14: