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:

B2-B4:

B4-B6:

B7:

Normal Operation
When the brake pedal is applied, the SJB sends a message to the PCM to deactivate the speed control, if engaged.

The speed control deactivator switch interrupts circuit CES09 (VT/OG), by removing the voltage signal to the PCM when the brake pedal is applied. This is a redundant signal to the PCM.
- DTC P1572 (Brake Pedal Switch Circuit) - sets when the PCM does not sense the proper sequence of the brake pedal input signal from both the stoplamp and deactivator switches when the brake pedal is pressed and released.
- DTC P1703 (Brake Switch Out of Self-Test Range) - sets when there is an open or short in the deactivator switch circuits or when there is an open or short in the stoplamp circuits.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Speed control deactivator switch
- PCM