Checking The Status

Fig 1: Identifying Ignition ON

GLL101051

Courtesy of VOLVO CARS CORPORATION

Ignition on.
Activate the read off for the signals for the brake pedal position sensor and stop lamp switch.

Check that the value at the brake pedal position sensor is approximately 7% when the brake pedal is unaffected and approximately 80% when the pedal is fully depressed with the engine running. Check also that the stop lamp switch changes status. When the brake pedal is unaffected, "OFF" must be displayed. If the brake pedal is depressed slightly, the status must change to "ON".

NOTE:
If an incorrect value is obtained from the brake pedal position sensor, the brake control module (BCM) must initially be searched for the fault cause.

The fault is intermittent at present if the values and the status from the brake pedal position sensor and the stop lamp switch correspond as above.

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA (Volvo Scan Tool)
Courtesy of VOLVO CARS CORPORATION

Continue
Refer to CHECKING THE POWER SUPPLY