Checking Control Module Power Supply

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

Fig 2: Disconnecting Control Unit

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

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

  Fig 3: Breakout Box

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  Fig 4: Identifying Voltage Display

  Courtesy of VOLVO CARS CORPORATION

The voltmeter should read battery voltage 

• OK 

  Refer to CHECKING THE CONNECTORS 

• NOT OK 

  Refer to CHECKING FUSE 16