Signal Missing. Permanent Fault

Signal missing. Permanent fault

Checking the components




- Check that relay for "rear collapsible head restraint" (location 2/75) is installed and is correctly installed.
- Do the necessary corrective action.
- Make sure that head restraint is folded up.
Head restraints are folded up manually.
- Ignition on.
Activate the rear collapsible head restraint by clicking on DOWN. Check that the head restraint folds down. The function switches off in 120 seconds if activated more than four times in one minute.

Additional information:
- For information on signals and additional values, see Signal specification Signal Specification
- To access/replace the relay, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- When relay is installed and not activated, relay control voltage ( 2) should be 12 V.









Do head restraints fold down?

Yes - FAULT FOUND

No - Replacing the component

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Replacing the component
Replace relay for "Rear collapsible head restraint" (location 2/75) and check relay connection, in particular the relay control (2/75 2), for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Additional information:
- For information on signals and additional values, see Signal specification Signal Specification
- To access/replace the relay, see Integrated relay/fusebox cargo compartment/Rear electronic module (REM), replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- When relay is installed and not activated, relay control voltage ( 2) should be 12 V.









Continue - Verification

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Verification




Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Install the components, connect the connectors, etc.
- Make sure that head restraint is folded up.
Head restraints are folded up manually.
- Ignition on.
Activate rear collapsible head restraint. Check that the head restraint folds down. The function switches off in 120 seconds if activated more than four times in one minute.





Do head restraints fold down?

Yes - Verification completed

No - 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the components

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