Test D: DTC C1784: Electronic Parking Brake (EPB) Motor Output Short To Ground

PINPOINT TEST D: DTC C1784: ELECTRONIC PARKING BRAKE (EPB) MOTOR OUTPUT SHORT TO GROUND

D1-D2:

Normal Operation
The electronic parking brake (EPB) 2-way motor receives power from circuit 32-CG19 (WH/VT) or 33-CG19 (YE/VT), depending the direction of the motor revolution. When the EPB is applied, circuit 32-CG19 (WH/VT) is equal to the battery voltage and circuit 33-CG19 (YE/VT) is equal to 0 volts. When the EPB is released, 32-CR19 (YE/VT) is equal to 0 volts and 33-CT19 (YE/VT) is equal to the battery voltage. Otherwise, both circuits are at one half of the battery voltage.

Possible Causes
- circuit 32-CG19 (WH/VT) short to ground
- circuit 33-CG19 (YE/VT) short to ground
- EPB module
- EPB switch
- EPB actuator