Signal Too Low

Signal too low

Checking the cable

Hint: The fault could also have been caused by the windshield wipers sticking.

If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can be caused by interference at start up of the central electronic module (CEM) or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs.
Check the cable between the central electronic module (CEM) and the windshield wiper motor (6/1). Check for a short-circuit to ground.
Take readings between Central electronic module (CEM) terminal #C31(#31) and the windshield wiper motor (6/1) #3.
Check the cable between the central electronic module (CEM) and the rain sensor (7/149). Check for a short-circuit to ground.
Take readings between Central electronic module (CEM) terminal #D11 (#11) and rain sensor (7/149) #4.
Also check the connectors.
If no other faults are found try a new windshield wiper motor (6/1).
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Central Electronic Module (CEM)
- Signal specification Signal Description, Central Electronic Module (CEM)
- Motor windshield wiper, replacing Motor, Windshield Wiper, Replacing

Continue - Verification

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Verification





Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the windshield wipers.
Check that the windshield wipers work in all positions.

Are the windshield wipers working?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing 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 - Exit fault-tracing

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the cable

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