Faulty Signal

Faulty signal

Checking the component, wiring and connectors
The control module has registered an open-circuit in the signal to the central locking switch in the door.
If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can occur for a number of different reasons. The fault is evaluated depending on how it occurs.
Check that the central locking switch is correctly connected.

Checking the wiring
Check the signal cable between the control module and the central locking switch.
Take readings between:
- The Driver door module (DDM)/Passenger door module (PDM) #A16 (#16) and the switch for central locking #4.
Remedy as necessary.

Other information
- Signal specification Signal Description, Driver's Door Module / Passenger Door Module (DDM/PDM)
- Checking wiring and terminals Checking Wiring and Terminals
- Panel front door Panel Front Door


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 the central locking button is functioning and that the button lighting lights.

Is the central locking button working?

Yes - Fault Found

No - Information

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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 - wiring and connectors

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