Checking the component

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on.

  If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can be caused by interference at start up of the central electronic module (HEM) or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs.

  Vary the light intensity. Read off the signal from the sun sensor.

  Cover the sun sensor with your hand to obtain the minimum signal, approximately 0.5 volts.

  Then direct a strong light source (for example a flashlight) at the sun sensor from close range to increase the signal.

  HINT: The value must vary between approximately 0.5 and 4.85 V. 

  NOTE:

  The illustration only shows the method. The appearance of the sun sensor can vary between different models.

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Sun Sensor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the function OK? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the wiring