Test B: DTC P1703 Or DTC P1572 - Brake On/Off Circuit Failure

PINPOINT TEST B: DTC P1703 OR DTC P1572 - BRAKE ON/OFF CIRCUIT FAILURE

B1-B3:

B3-B5:

B5-B7:

B7-B9:

B10-B13:

Normal Operation
The speed control deactivator switch interrupts the power signal to the powertrain control module (PCM) through circuit 636 (OG) when the brake pedal is applied firmly. This is a redundant signal to the PCM.

Possible Causes
- Fuse
- Circuit 22 (LB/PK) open
- Circuit 636 (OG) open or short to voltage
- Circuit 1651 (WH/RD) open
- Stoplamp switch
- Speed control deactivator switch
- PCM
- Lighting control module (LCM)
- Anti-lock brake system (ABS) module