Checking communication with the headlight control module (HCM)

Fig 1: Identifying Ignition On Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

HINT: The CAN communication with the control module is probably OK if the control module ID can be read off. In that case the fault is probably intermittent and will then be more difficult to trace. 

• Ignition on.
• Try to communicate with the headlight control module (HCM) by reading off the control module ID.
• Click the symbol for VCT2000 to begin reading off.

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Signal missing