Checking The Connectors And Cables

• Ignition off.

  Check the connector between the Differential Electronic Module (DEM) and the feed pump with respect to contact resistance and oxidation.

  Check the lead between the Differential Electronic Module (DEM) and the feed pump for damage.

  Reinstall the connectors, components etc.

  • Ignition on.

  Activate the feed pump and check that it starts and runs normally.

  Listen using a stethoscope or a screwdriver pressed to your ear. The feed pump motor must hum and vibrate slightly.

  NOTE:

  The pump motor may sound like it's running but in certain cases it only oscillates.

  Remedy as necessary.

  Other information: 

  • see SIGNAL SPECIFICATION
  Fig 1: Identifying Connector Terminals

  Courtesy of VOLVO CARS CORPORATION
  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Active On Demand Coupling Components

  Courtesy of VOLVO CARS CORPORATION

Is the feed pump working? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to INFORMATION