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

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

B1-B2:

B3-B4:

B5-B7:

B8-B9:

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 interrupts circuit CES09 (VT/OG) removing the voltage signal to the PCM when the brake pedal is applied. This is a redundant signal to the PCM.

Possible Causes
- Fuse
- Circuit CBP44 (VT) open
- Circuit CCB08 (VT/WH) open
- Circuit CES09 (VT/OG) open or short to voltage
- Speed control deactivator switch (integral to the stoplamp switch)
- Anti-lock brake system (ABS) module
- PCM