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

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

B1-B2:

B3-B5:

B5-B7:

B7-B8:

B9-B10:

Normal Operation
When the brake pedal is applied, the smart junction box (SJB) sends a message to the powertrain control module (PCM) to deactivate the speed control if engaged.

The speed control deactivator switch receives voltage through circuit 391 (RD/YE). The switch removes voltage from circuit 535 (LB/RD) to the PCM when the brake pedal is applied firmly and passes the stoplamp switch trip point. This is a redundant signal to the PCM.

Possible Causes
- Fuse
- Circuit 391 (RD/YE) open
- Circuit 535 (LB/RD) open, or short to voltage
- Speed control deactivator switch
- Anti-lock brake system (ABS) module
- Bussed electrical center (BEC)
- SJB
- PCM