Checking the power supply

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Disconnecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Disconnect central electronic module (CEM) connector E.

  Check central electronic module (CEM) connector E. Check for contact resistance and oxidation. Check for damage carefully.

  Check the power supply to central electronic module (CEM) terminals #EA and #EB from the rear electronic module (REM). Also check the intermediate fuses. The voltage must be at least battery voltage minus 3 V.

  NOTE:

  Also check the power supply from the battery to rear electronic module (REM) terminal #K1. Check for an open-circuit. Check for loose connections. Check for contact resistance and oxidation. Check the fuse.

  Remedy as necessary.

  Other information 

  • For further information about the fuses and relays, see the appropriate Wiring Diagram
  • See Connecting the breakout box
  • See Signal specification
  • See Location of components
  • See Checking wiring and terminals

Was a fault detected? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the ground terminal