Checking the connectors

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Check the connectors of the ABS control unit and the pre-pressure valve for contact resistance and oxidation, as described in Contact resistance and oxidation .
• Connect the connectors, install the components, etc.
• Ignition on.
• Use the Activation function to activate the pre-pressure valve.

  The status must switch between OFF and ON.

  Additional information: 

  • See Replacing the control module for ABS and dynamic stability and traction control (DSTC)
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Brake Booster

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the status switch between OFF and ON? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the wiring and sensor