Signal Missing. Permanent Fault

Signal missing. Permanent fault

Checking the component




- Check that "Folding rear head restraint" relay (position 2/75) is in place and correctly installed
- Remedy as necessary
- Ensure that the head restraints are folded up.
The head restraints are folded back manually
- Ignition on.
Activate the rear folding head restraint by pressing DOWN. Check that the head restraints fold down. The function is switched off for 120 seconds if it is activated more than four times in one minute.

Other information:
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters
- To access and replace the relay, see Integrated relay/fuse box cargo compartment/rear electronic module, replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- When the relay is installed but not activated, the voltage at the relay guide (terminal #2) should be 12 V.









Does the head restraint fold down?

Yes - Fault Found

No - Replacing the component

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Replacing the component
Replace the relay for the rear foldable head restraint (position 2/75). Check the relay connection, in particular the relay guide (2/75 terminal #2). Check for an open-circuit.

Other information:
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters
- To access and replace the relay, see Integrated relay/fuse box cargo compartment/rear electronic module, replacing Integrated Relay/Fusebox Cargo Compartment/Rear Electronic Module (REM), Replacing
- When the relay is installed but not activated, the voltage at the relay guide (terminal #2) must be 12 V
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.










Continue - Verification

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Verification




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 - 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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Attempt New Test - Checking the component

FAULT-TRACING FAILED - No Fault Found

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