Checking wheel sensor connector

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Disconnect control module.
• Check rear wheel sensor and ABS control module connectors for contact resistance and oxidation according to Contact resistance and oxidation .
• Connect control module.
• Raise car so the relevant wheel is clear of ground.
• Ignition on.
• Read off wheel speed for relevant wheel.

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

  Other information: 

  • To disconnect wheel sensor connector, see Wheel sensors, rear, replacing .
  • To disconnect 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.

Is wheel speed updated? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking cables and sensors