Test B: DTC P1703 - Brake Switch Out of Self-Test Range

PINPOINT TEST B: DTC P1703 BRAKE SWITCH OUT OF SELF-TEST RANGE

B1-B4:

B4-B6:

B7:

Normal Operation
When the brake pedal is applied, the stoplamp switch supplies voltage to the stoplamps through circuit 511 (LG). This signal is also supplied to the PCM to indicate the brake pedal is applied. When the PCM senses the voltage from the stoplamp switch, the speed control is deactivated.

The speed control deactivator switch interrupts the power signal to the PCM through circuit 307 (BK/YE) when the brake pedal is applied firmly and passes the stoplamp switch trip point. This is a redundant signal to the PCM.

DTC P1703 - 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.

Possible Causes
- Fuse
- Circuit 295 (LB/PK) open
- Circuit 307 (BK/YE) open or short to voltage
- Circuit 511 (LG) open
- Speed control deactivator switch
- PCM