Checking The Central Locking Switch

Checking the central locking switch

Checking the locking signal from the central locking switch




- Ignition on.
Read off central locking switch status.
Depress central locking switch to its locking position.
The value should be LOW when the central locking switch is depressed to its locking position.

Note! A diagnostic trouble code (DTC) is stored if the central locking switch is held in the locking position for more than 10 seconds with the ignition on.









Is the value OK?

Yes - Checking unlocking signal from the central locking switch

No - Checking wiring and connectors

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Checking wiring and connectors
Check the central locking switch and VGLA control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between VGLA control module #A4 (A4) and central locking switch #3 and the cable between central locking switch #5 and ground for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.









Was a fault detected?

Yes - Verification

No - Replacing the component

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Checking unlocking signal from the central locking switch




- Ignition on.
Read off central locking switch status.
Depress central locking switch to its unlocking position.
The value should be LOW when the central locking switch is depressed to its unlocking position.

Note! A diagnostic trouble code (DTC) is stored if the central locking switch is held in the locking position for more than 10 seconds.









Is the value OK?

OK - No Fault Found

Not OK - Checking wiring and connectors

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Checking wiring and connectors
Check the central locking switch and VGLA control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between central locking switch #2 and VGLA control module #A6(A6) for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.









Was a fault detected?

Yes - Verification

No - Replacing the component

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Replacing the component
Try a new central locking switch.





Continue - Verification

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Verification

Hint: After carrying out the repair check that the fault has been remedied as follows:








- Ignition off.
- Reconnect the connectors, reinstall components etc.
- Ignition on.
Read off central locking switch status.
Press the central locking switch, first to its locking position and then to its unlocking position.
The values should change from HIGH to LOW when the central locking switch is pushed to the relevant position.

Note! A diagnostic trouble code (DTC) is stored if the central locking switch is held in the locking / unlocking position for more than 10 seconds.





Are these readings OK.

OK - FAULT FOUND

Not OK - 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the locking signal from the central locking switch

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