Checking the power supply

Fig 1: Identifying Ignition ON

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• Ignition off
• Remove relay 2/29 from the central electronic module (CEM) relay holder
• Ignition on.

  Check the voltage between relay holder 2/29 terminal #3 and ground.

  Other information: 

  • To connect the breakout box, see Connecting the breakout box
  • For information about signals, see Signal specification and Signal specification .
  Fig 2: Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Voltage Display

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the voltage OK? 

• YES 

  Refer to Checking the relay 

• NO 

  Refer to Repair cable