Checking the connector

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Check the control module connector. Check for contact resistance and oxidation. Remedy if necessary.

  In particular, check for any damage

• Reinstall the components, reconnect the connectors etc.
• Ignition on.
  NOTE:

  It is important that only the ignition is on in order for the heater to start.

• Activate the heater.

  Listen for a buzzing sound which indicates that the heater is running.

  Check the heater function.

  If the heater now functions, the cause of the fault was loose connections in the connector.

  Other information: 

  • See Connecting the breakout box
  • See Engine coolant heater, test running
  • See Checking wiring and terminals
  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the heater working? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the supply circuit