Checking The Control Module And Wheel Sensor Connectors

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

Fig 2: Connecting Connector

Courtesy of VOLVO CARS CORPORATION

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

  Depress and release the brake pedal. The value must change between OFF and ON.

  If the value changes, the cause of the fault was loose connections in the control module or wheel sensor connectors.

  Other information 

  • For information about removing the brake control module (BCM) connector, see CONNECTING THE BREAKOUT BOX, BRAKE CONTROL MODULE (BCM)
  • To fault-trace the wiring and connections, see CONTENTS .
  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION

Does the value change? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  see CHECKING THE FUSE, WIRING AND SENSORS