Checking Sun Roof

Checking sun roof

Checking the connectors




- Ignition off.
Check the upper electronic module (UEM), sun roof module (SRM) and wiring connectors (54/3R and 54/13). Check for contact resistance and oxidation. Check for loose connections.
Check for damage carefully.
Reinstall the components, reconnect the connectors etc.
Ignition on.
Operate the sun roof.

Other information
- To access the upper electronic module (UEM), see Upper electronic module (UEM) rear view / door mirror, replacing Service and Repair
- To access the sun roof connector, see Sun roof module (SRM), replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.





Do the sun roof controls operate?

Yes - Fault Found

No - Checking components and wiring

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Checking components and wiring
Check that main fuse (11A/2) in the relay / fusebox in the engine compartment is intact.
Check that fuse (11C/34) in the integrated relay / fusebox in the passenger compartment is intact.
Check the cable between sun roof module (SRM) terminal #1 and the battery. Check for a short-circuit to ground. Check for an open-circuit.
Check the cable between sun roof control module terminal #10 and ground: Check the left A-post. Check for a short-circuit to ground. Check for an open-circuit.

The upper electronic module (UEM) and sun roof module (SRM)
Check the cable between upper electronic module (UEM) terminal #8 and sun roof module (SRM) terminal #6. Check for a short-circuit to ground.

Sun roof control module and roof lamp module
Check the cable between the sun roof module (SRM) terminal #2 and the roof lamp module terminal #4B. Check for a short-circuit to supply voltage.
Check the cable between the sun roof module (SRM) terminal #8 and the roof lamp module terminal #3B. Check for a short-circuit to supply voltage.
Check the cable between sun roof module (SRM) terminal #8 and roof lamp module terminal #3B. Check for an open-circuit.
Check the cable between sun roof module (SRM) terminal #2 and roof lamp module terminal #4B. Check for an open-circuit.
Check the cable between sun roof module (SRM) terminal #3 and roof lamp module terminal #2B. Check for an open-circuit.
Check the cable between sun roof module (SRM) terminal #7 and roof lamp module terminal #1B. Check for an open-circuit.
Check the cable between the sun roof module (SRM) terminal #9 and the roof lamp module terminal #9A. Check for an open-circuit. Check for a short-circuit to ground.

Sun roof switch and roof lamp module
Check the wiring between sun roof switch and roof lamp module (RCM). Check for an open-circuit. Check for a short-circuit to supply voltage.
Remedy as necessary.

Other information
- For further information about signals and other values, see Signal specification Signal Specification, Upper Electronic Module (UEM)
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To replace the switch for the sun roof, see Switch sun roof, replacing Service and Repair
- To access the roof lamp module connector, see Replacing interior lighting Service and Repair
- To access the sun roof control module, see Sun roof module (SRM), replacing Service and Repair
- With the ignition off, the voltage between control module terminal #1 and ground should be battery voltage
- Checking wiring and terminals Checking Wiring And Terminals.













Continue - Checking components

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Checking components
Visually check for damage to the roof lamp module and its switches.
Remedy as necessary.
If no fault is found replace the sun roof switch.

Other information
- To replace the switch for the sun roof, see Switch sun roof, replacing Service and Repair.









Continue - Fault Found

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