Checking Component And Wiring

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Light switch in position 0
• Disconnect connector A from the left-hand gas discharge lamp module (GDL).

  Check that the position sensors are correctly installed.

  Check that the control arms are correctly installed on the position sensors

  Check the connectors for contact resistance and oxidation. Check for damage carefully.

  Check the signal cable between the front position sensor and the left-hand gas discharge lamp module (GDL). Check for an open-circuit. Check for a short-circuit to supply voltage.

  Take readings between:

  • Left-hand gas discharge lamp module (GDL) terminal #A1 and front position sensor terminal #4
  • Left-hand gas discharge lamp module (GDL) terminal #A4 and front position sensor terminal #1
  • Left-hand gas discharge lamp module (GDL) terminal #A3 and front position sensor terminal #5.

  Check the signal cable between the rear position sensor and the left-hand gas discharge lamp module (GDL). Check for an open-circuit. Check for a short-circuit to supply voltage.

  Take readings between:

  • Left-hand gas discharge lamp module (GDL) terminal #A2 and rear position sensor terminal #4
  • Left-hand gas discharge lamp module (GDL) terminal #A4 and rear position sensor terminal #1
  • Left-hand gas discharge lamp module (GDL) terminal #A3 and rear position sensor terminal #5.

  Remedy as necessary.

  Other information: 

  • see CONNECTING THE BREAKOUT BOX (2004, 2005, 2006, 2007)
  • see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM) (2004, 2005, 2006, 2007)
  • see LOCATION OF COMPONENTS (2004, 2005, 2006, 2007)
  • see POSITION SENSOR REAR, HEADLAMP (2004, 2005, 2006, 2007)
  • see HEADLAMP BALLAST (XENON) (2004, 2005, 2006, 2007)
  • see CHECKING WIRING AND TERMINALS
  Fig 2: Identifying 8-Bit Connector

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to COMPONENTS, REPLACING