P0703

Test 1 - 2:

Test 3 - 7:

Test 8:

SYMPTOM
P0703 - BRAKE SWITCH SENSE CIRCUIT

WHEN MONITORED
TEST # 1: Vehicle speed greater than 17 MPH to enable. TEST # 2: Speed must be 0 and brake switch indicates on.

SET CONDITION
TEST # 1: If vehicle speed goes to 0 MPH without brake input. Condition must be repeated 9 times to set fault. Two trip fault. TEST # 2: If vehicle speed go above 17 MPH for more than 6.4 seconds without a change with the brake depressed. Condition must be repeat 9 times to set fault.

POSSIBLE CAUSES
- Good trip equal to zero
- Fused B+ circuit
- Brake switch sense circuit shorted to voltage
- Brake switch sense shorted to ground
- Brake switch sense circuit open
- Ground circuit open
- Brake lamp switch operation
- PCM