Checking Connectors And Wiring

Check central electronic module (CEM) connector B and the connector to the alarm LED. Check for contact resistance. Check for oxidation. Check for damage carefully.

Check the signal cable between the central electronic module (CEM) and the alarm LED. Check for an open-circuit. Check for a short-circuit to supply voltage.

Take readings between:

• Central electronic module (CEM) terminal #B5 (#5) and alarm LED terminal #3.

Check the ground lead between the central electronic module (CEM) and the alarm LED. Check for an open-circuit. Check for a short-circuit to supply voltage.

Take readings between:

• Central electronic module (CEM) terminal #B28 (#28) and alarm LED terminal #5.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX (2008, 2009, 2010, 2011)
• see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM) (2008, 2009, 2010, 2011)
• see LOCATION OF COMPONENTS (2010, 2011)
• see SUN SENSOR
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Twilight Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to INFORMATION