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 .
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 .
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 .
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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