Signal Too High or Signal Missing. Permanent Fault

Signal too high or Signal missing. Permanent fault

Checking the cable
Check the cable between central electronic module (CEM) terminal #4D and steering wheel module (SWM) (3/130) terminal #21.
Check for a short-circuit to supply voltage. Check for an open-circuit.
Remedy as necessary.

Other information
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals





Was a fault detected?

Yes - Verification

No - Replacing wiper / washer switch

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Replacing wiper / washer switch
Replace wiper / washer switch. See Washer / wiper switch, replacing Service and Repair.


Continue - Verification

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Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Check that no windshield wiper function is activated and read off all the values from the control module.
Read off the values.





Are all windshield wiper functions switched off?

Yes - Fault Found

No - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking the cable

FAULT-TRACING FAILED - No Fault Found

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