Checking the vacuum pump

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Vacuum pump removed.
  Fig 3: Identifying Connector Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  • Temporarily connect a cable between vacuum pump pin terminal #3 and the battery positive terminal. Connect a cable between vacuum pump pin terminal #2 and the battery negative terminal. The vacuum pump should start.
  • Remove the temporarily connected cables.

Did the vacuum pump start? 

• YES 

  Refer to Checking for contact resistance and oxidation 

• NO 

  Refer to Replacing the component