Intermittent fault

Check the connectors for the upper electronic module (UEM) and the sun roof module (SRM). Check for contact resistance and oxidation. Check for loose connections.

Check the cable between the upper electronic module (UEM) terminal #21 and the sun roof module (SRM) terminal #4. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit. Check for an intermittent short-circuit to supply voltage.

Other information: 

• For further information about signals and other values, see Signal specification
• To connect the breakout box, see Connecting the breakout box
• To access the sun roof control module, see Control module, sun roof, replacing
• To access the connector for the upper electronic module (UEM), see Interior lighting and upper electronic module (UEM), replacing
• See Checking wiring and terminals .

Fig 1: Identifying Sunroof Module Connector A Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Connector F Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

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