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 for contact resistance and oxidation. Remedy if necessary.

  Check for damage carefully

• 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.

  A buzzing sound should be heard from the heater.

  Check the function of the heater. See Engine coolant heater, test running .

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

  Other information: 

  • To access the control module or connect the breakout box, see Connecting the breakout box
  • See Checking wiring and terminals .
  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Does the heater operate? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the supply circuit