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 .
  Fig 2: Breakout Box

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Voltage Display

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Is the voltage OK? 

• YES 

  Refer to CHECKING THE RELAY 

• NO 

  Refer to REPAIR CABLE