Test J

Test J1-J4:

PINPOINT TEST J: DTC C1786: EPB MOTOR OUTPUT CIRCUIT SHORT TO BATTERY

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

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

Possible Causes
^ Circuit 32-CG19 (WH/VT)
^ Circuit 33-CG19 (YE/VT)
^ EPB actuator
^ EPB module