Signal Too Low
Signal too low
Checking for permanent or intermittent faults
- Ignition on.
Check that the sun roof can be moved to its limit positions.
Can the sun roof be operated?
Yes - Intermittent fault
No - Checking the connectors
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Checking the connectors
Check the connector between the sun roof module (SRM) and sun roof motor. Check for contact resistance and oxidation.
Check that fuse 11C/34 (11C/26 XC90) in the passenger compartment fuse box is intact.
Check connector 54/13. Check for contact resistance and oxidation.
Other information:
- To access the connector between the sun roof module (SRM) and motor, see Electric motor, sun roof, replacing Service and Repair.
- Checking wiring and terminals Checking Wiring And Terminals.
Was a fault detected?
Yes - Verification
No - Checking for open-circuits and short-circuits
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Checking for open-circuits and short-circuits
Check the cable between sun roof module (SRM) terminal #10A and ground, left A-post. Check for a short-circuit to supply voltage.
Check the cable between the sun roof module (SRM) terminal #1A and fuse 11C/34 (11C/26 XC90) in the passenger compartment fuse box for a short-circuit to ground or an open-circuit.
Replace the cable if a fault is found.
After carrying out repairs, the sun roof module (SRM) should be calibrated. See Sun roof module (SRM), calibrating Programming and Relearning.
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 access the sun roof module (SRM) connector, see Sun roof module (SRM), replacing Service and Repair.
- Checking wiring and terminals Checking Wiring And Terminals.
Was a fault detected?
Yes - Verification
No - Replacing the component
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Replacing the component
- Replace the sun roof motor. See Electric motor, sun roof, replacing Service and Repair.
- Ignition off
- Reinstall the components and connectors etc.
- Ignition on.
After carrying out repairs, the sun roof module (SRM) should be calibrated. See Sun roof module (SRM), calibrating Programming and Relearning.
Check that automatic closing of the sun roof works by pressing forward the switch 2 steps.
Does the automatic closing of the sun roof work?
Yes - Verification
No - Replacing the component
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Replacing the component
- Ignition off
Replace the sun roof control module according to Sun roof module (SRM), replacing Service and Repair.
Continue - Verification
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Intermittent fault
Check the connector between the sun roof module (SRM) and sun roof motor. Check for contact resistance and oxidation. Check for loose connections.
Check connector 54/13. Check for contact resistance and oxidation. Check for loose connections.
Check the cable between sun roof module (SRM) terminal #10A and ground, left A-post. Check for an intermittent short-circuit to supply voltage.
Check the cable between the sun roof module (SRM) terminal #1A and fuse 11C/34 (11C/26 XC90) in the passenger compartment fuse box for a short-circuit to ground or an intermittent open-circuit.
After carrying out repairs, the sun roof module (SRM) should be calibrated. See Sun roof module (SRM), calibrating Programming and Relearning.
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 access the connector between the sun roof module (SRM) and motor, see Electric motor, sun roof, replacing Service and Repair.
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Trouble-shooting information
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Verification
Verification
Verification
Hint: After the repair it is necessary to check that the fault has been rectified.
- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
Check that the sunroof can be moved to its end position.
Does the sunroof move?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Trouble-shooting information
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Trouble-shooting information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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Attempt New Test - Checking for permanent or intermittent faults
FAULT-TRACING FAILED - No Fault Found
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Trouble-shooting information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - Fault Found
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FAULT FOUND - Fault Found
Attempt New Test - Checking for permanent or intermittent faults
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