Checking the 15-supply to the control module

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 terminals #4 and #8 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 approximately battery voltage. 

• OK 

  Refer to Checking the 30-supply (valves) to the control module 

• NOT OK 

  Refer to Checking fuse 11/9