Checking the control module for open-circuits

• Remove relay 2/87.

  Check the driver circuit for the relay coil for an open-circuit as follows: Activate the relay driver. Measure the voltage between terminals #1 and #2 on the relay base.

  For further information about open-circuits, see Open-circuit, permanent faults .

  HINT: The voltage between terminals #1 and #2 should be battery voltage. 

  HINT: If the value deviates excessively, check the voltage between terminal #2 and the battery and between terminal #1 and ground. Both should equal battery voltage. 

  HINT: Check for an open-circuit according to  Open-circuit, permanent faults  . 

  HINT: Do not forget to check that the power supply to the control module is OK. 

  Other information: 

  • To access the integrated relay / fusebox in the cargo compartment, see Relay/fuse box cargo compartment/Rear electronic module (REM), replacing .
  Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 2: Identifying Relays And Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the control module for short-circuits