Checking Central Locking Switch, Driver's Door

Checking central locking switch, driver's door

Checking the locking signal from the driver's door central locking switch




- Ignition on.
Depress driver's door central locking switch to its locking position.
Read off central locking switch status.

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





The value should be LOW when the central locking switch is depressed to its locking position

OK - Checking the unlocking signal from the driver's door central locking switch

Not OK - Checking contact resistance

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Checking contact resistance




- Disconnect central locking switch.
- Check 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.
- Ignition on.
- Depress central locking switch to its locking position.
Read off central locking switch status.
The value should be low when the central locking switch is depressed to its locking position
If the value is OK the cause of the fault has been loose connections in the connectors.





Is the value OK?

Yes - Verification
FAULT FOUND

No - Checking cables

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Checking cables
Check cable between central locking switch connector terminal 5 and ground for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.





Were any faults found in the cable?

Yes - Verification
FAULT FOUND

No - Replacing component

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Replacing component
Replace central locking switch.

Continue - Verification
FAULT FOUND

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Checking the unlocking signal from the driver's door central locking switch




- Ignition on.
- Depress the driver's door central locking switch to its unlocking position.
Read off central locking switch status.

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





The value should be LOW when the central locking switch is depressed to its unlocking position

OK - No Fault Found

Not OK - Checking contact resistance

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Checking contact resistance




- Disconnect central locking switch.
- Check 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.
- Ignition on.
- Depress central locking switch to its unlocking position.
Read off central locking switch status.
The value should be low when the central locking switch is depressed to its unlocking position
If the value is OK the cause of the fault has been loose connections in the connectors.





Is the value OK?

Yes - FAULT FOUND

No - Replacing component

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Verification

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








- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
- Depress central locking switch, first to its locking position and then to its unlocking position.
Read off central locking switch status.





The value should be LOW in both positions.

OK - FAULT FOUND

Not OK - Fault-tracing information
No Fault Found

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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 driver's door central locking switch

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