Test B: DTC C1094/C1782: Park Brake Apply/Release Switch Circuit Failure
Pinpoint Test B: DTC C1094/C1782: Park Brake Apply/Release Switch Circuit FailureNormal Operation
The electronic parking brake (EPB) switch circuits 8-CG15 (WH/BU) and 10-CG15 (GY/VT) receive a reference voltage from the EPB module when the switch is in its neutral position. This voltage is between 3.5 and 4.5 volts. When the switch contacts close on the apply or release side, a resistor inside the switch is bypassed, causing the reference voltage on switch circuits 8-CG15 (WH/BU) or 10-CG15 (GY/VT) to change from 1.5 to 3.0 volts. When the EPB module receives this voltage range on the apply or release circuit, an output signal is generated to the actuator to apply or release the EPB.
Possible Causes
^ EPB switch
^ Circuit 8-CG15 (WH/BU) open or short to voltage
^ Circuit 10-CG15 (GY/VT) open or short to voltage
^ EPB module
B1-B3:
B3-B5:
