Checking the ground terminal

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Disconnecting Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Module disconnected.
• Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).

  For the control module, DVD player and TV receiver  , connect an ohmmeter between the battery negative terminal and terminal #11 on the breakout box.

  For the display  , connect an ohmmeter between the battery negative terminal and terminal #15 on the breakout box.

  Fig 3: Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Identifying Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 0 Ω. 

• OK 

  OKAY:  Troubleshooting has been completed.

• NOT OK 

  Refer to Checking for open-circuits, contact resistance and oxidation