Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the wiring




- Ignition off.
Check the following cables: Check the cable between control module connector P #14 (#B34) and the instrument lighting in the combined instrument panel. Check the cable between control module connector P #15 (#B35) and the information center lighting. Check the cable between control module B2 #22 (#A22) and the lighting in the heater control, the cigarette lighter, ECC, the gear selector for the automatic transmission, the switch for the passenger airbag, the switch for central locking, the switch for child proof locks. Check the cable between control module connector B2 #23 (#A23) and the radio lighting. Check all these cables for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

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 Signal Specification. Central Electronic Module (CEM).









Select Continue.

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 instrument lighting at 42% and 100% strength.
Check that the luminance of the instrument lighting changes.





Is the instrument lighting OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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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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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the wiring

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