Checking the wiring

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

Take readings between:

• Central electronic module (CEM) terminal #D30 (#30) and sun sensor terminal #1
• Central electronic module (CEM) terminal #D42 (#42) and sun sensor terminal #5.

Remedy as necessary.

Other information 

• See Connecting the breakout box
• -2004: Signal specification
• 2005-: Signal specification
• See Sun sensor / alarm LED, replacing
• See Central electronic module (CEM), replacing
• See Checking wiring and terminals

Fig 2: Identifying Connector D

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Twilight Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Verification