Checking ground terminal

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

  For the control module, CD-ROM changer and TV receiver  , connect an ohmmeter between #11 on the breakout box and battery negative terminal.

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

  Fig 1: Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 2: Identifying Ohm Meter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 0 Ω. 

• OK 

  OKAY:  Troubleshooting has been completed.

• NOT OK 

  See Checking for open-circuits, contact resistance and oxidation