Checking The Tailgate/Trunk Lid Switch

Checking the tailgate/trunk lid switch

Checking the signal from tailgate switch




- Ignition on.
- Truck lid/tailgate open
Read off the tailgate switch status.
The value should be LOW when the tailgate is open.





Is the value LOW?

Yes - No Fault Found

No - Checking the connectors

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Checking the connectors




- Check the VGLA-control module connector and the connector for the lock unit in the tailgate for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Ignition on.
- Truck lid/tailgate open
Read status for the door switch in the tailgate/trunk lid.
The value should be LOW when the tailgate/trunk lid is open.
If the value is OK the cause of the fault was loose connections in the connectors.





Is the value LOW?

Yes - FAULT FOUND

No - Checking for an open-circuit

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Checking for an open-circuit
Check the cable between VGLA control module #A19 and the lock unit in tailgate/trunk lid terminal 1 and the cable between the lock unit in the tailgate/trunk lid terminal 4 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 cables?

Yes - Verification

No - Replacing component

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Replacing component
Replace the trunk lid lock unit according to Replacing the lock unit on the tailgate, electric switch or motor (2/4-door). Service and Repair

Select "Continue" when this has been done.

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 connectors, reinstall components.
- Ignition on.
- Truck lid/tailgate open
Read status for the door switch in the tailgate/trunk lid.
The value should be LOW when the tailgate/trunk lid is open.





Is the value LOW?

Yes - FAULT FOUND

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 signal from tailgate switch

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