Checking the control module and wheel sensor connectors

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Check the ABS control module and stop lamp switch connectors for contact resistance and oxidation according to 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 ABS control module connector, see Control module (ABS), replacing .
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the value change? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the fuse, wiring and sensors