Checking Central Locking Switch, Passenger Door

Checking central locking switch, passenger door

Checking the locking signal from the passenger door central locking switch




- Ignition on.
- Depress passenger 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 passenger 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 VGLA control module #A16 and central locking switch connector terminal 3, cable between VGLA control module #A4 and central locking switch connector terminal 5 and cable between central locking switch connector terminal 4 and ground for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.





Was a fault found in the wiring?

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 passenger door central locking switch








- Ignition off.
- Disconnect VGLA control module according to Replacing the control module Replacing the Control Module.
- Disconnect VGLA control module.
Connect an ohmmeter between VGLA control module #A6 and ground.
Depress passenger door central locking switch to its unlocking position.





The ohmmeter should read approximately 0 ohms when the central locking switch is depressed to its unlocking position.

OK - No Fault Found

Not OK - Checking cables

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Checking cables
Check cable between VGLA control module #A6 and central locking switch connector terminal 6 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.





Was a fault found in the wiring?

Yes - Verification

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.
- Close all doors.
Lock and unlock the driver's and passenger doors using the central locking switches.

Is the function OK?

Yes - Fault has been remedied

No - 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 passenger door central locking switch

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