Checking the connectors for the control module and wheel 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 wheel sensor and ABS control module connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation
• Reinstall the components, reconnect the connectors etc.
• Raise the car so that the relevant wheel is clear of the ground
• Ignition on
• Read off the wheel speed for the relevant wheel.

  Spin the relevant wheel and check that the wheel speed is updated.

  If the wheel speed is updated, the cause of the fault was loose connections in the connectors for the control module or wheel sensor.

  Other information: 

  • To disconnect the wheel sensor connector, see Wheel sensor, front, replacing
  • To disconnect the ABS control module connector, see Control module (ABS), replacing .
  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the wheel speed updated? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking wiring and sensors