Faulty Signal

Faulty signal

Checking components and wiring
Check the connectors on the central electronic module (CEM) and the sensor for the seat belt reminder. Check for contract resistance and oxidation. Check for damage or loose connections.
Check the signal cables between central electronic module (CEM) terminals D27 (#27) and D28 (#28) with the seat belt reminder sensor disconnected by measuring the resistance. Check for a short-circuit to each other. The resistance must be infinite.
Check the seat belt reminder sensor. Measure the resistance between terminals #1 and #2 in the sensor connector.

Hint: The resistance should be above 50 kohms with no passengers and below 50 kohms with passengers.

Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Pinout Values and Diagnostic Parameters
- To replace the seat belt reminder sensor, see: Heater pad backrest and cushion, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals


Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read off the status of the seat belt reminder sensor. Check that the sensor changes status with and without a passenger in the passenger seat.





Does the status of the seat belt reminder sensor change with and without a passenger?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking components and wiring

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