Checking ground terminal #B28

Fig 1: Identifying Ignition Off Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
• Connect control module.
  Fig 2: Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  • Connect an ohmmeter between #28 (#B28) on the breakout box and battery negative terminal.
  Fig 3: Connecting Ohmmeter To ECU And Negative Battery Terminal

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 0 Ω. 

• OK 

  Refer to Reading is OK 

• NOT OK 

  Refer to Checking for an open-circuit 

Fig 1: Identifying Ignition Off Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
• Connect control module.
  Fig 2: Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  • Connect an ohmmeter between #28 (#B28) on the breakout box and battery negative terminal.
  Fig 3: Connecting Ohmmeter To ECU And Negative Battery Terminal

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 0 Ω. 

• OK 

  Refer to Reading is OK 

• NOT OK 

  Refer to Checking for an open-circuit