Checking control module power supply

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Disconnecting Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Control module disconnected.
• Ignition on.

  Connect a voltmeter between #35 (#A35) and #53 (#A53) on the breakout box.

  Fig 3: Breakout Box

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

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The voltmeter should read battery voltage 

• OK 

  Refer to Checking the connectors 

• NOT OK 

  Refer to Checking fuse 16