Checking the control module and sensor connectors

HINT: The cause of the diagnostic trouble code (DTC) may be in the circuit for the stop lamp switch or for the pedal position sensor. 

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Check the connectors for the brake control module (BCM), the stop lamp switch and the pedal position sensor. Check for contact resistance and oxidation
• Reinstall the components, reconnect the connectors etc.
• Ignition on
• Read off the status of the stop lamp switch and the position of the pedal position sensor.

  Depress and release the brake pedal. The value must change between OFF and ON and the position of the pedal position sensor must be updated.

  Other information 

  • To disconnect the connector for the brake control module (BCM), see Connecting the Breakout Box
  • To access the stop lamp switch, see Stop lamp switch, replacing .
  • To access the pedal position sensor, see Pedal sensor power brake booster, replacing
  • Checking wiring and terminals

  Select an option: 

  1. The value for the stop lamp switch does not change. Refer to Checking the fuse, wiring and sensors .
  2. The value for the pedal position sensor is not updated. Refer to Signal outside its permitted range .
  3. These values are OK. Troubleshooting has been completed.
  Fig 3: Identifying VCT2000

  Courtesy of VOLVO CARS OF NORTH AMERICA.