Signal Too Low

Signal too low

Checking the signal from the passenger door central locking switch
Read the status of the central locking switch when the switch is unaffected.
The value should be HIGH.





Is the value HIGH?

Yes - Intermittent fault

No - Checking the passenger door central locking switch

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Checking the passenger door central locking switch








- Remove the central locking switch from the door panel
- Disconnect the central locking switch.
Read off the status of the central locking switch.
If the value is now HIGH it means that the central locking switch is defective.





Is the value HIGH?

Yes - Replacing the component

No - Checking the wiring

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Replacing the component
Try a new central locking switch.

Continue - Verification

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Checking the wiring




Check the cable between control module terminal #A20 and passenger door central locking switch terminal #4. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Other information:
- For further information about signals and other values, see Signal specification, lock and alarm, (VGLA) Signal Specification, Lock And Alarm, (VGLA)
- To connect the breakout box, see Connecting the breakout box, lock and alarm (VGLA) Connecting The Breakout Box, Lock And Alarm (VGLA).









Continue - Verification

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Verification

Hint: After repairs have been completed, they must be verified as follows to ensure that the fault has been eliminated:








- Ignition on
- Reinstall the connectors, components etc.
Read off the status of the central locking switch. The value must be HIGH in the unaffected position and LOW when the passenger door central locking switch is pressed to the lock position.





Is the value OK?

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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FAULT-TRACING FAILED - No Fault Found

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

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Intermittent fault
Check the cable between control module terminal #A20 and passenger door central locking switch terminal #4. Check for a short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults ,

Other information:
- For further information about signals and other values, see Signal specification, lock and alarm, (VGLA) Signal Specification, Lock And Alarm, (VGLA)
- To connect the breakout box, see Connecting the breakout box, lock and alarm (VGLA) Connecting The Breakout Box, Lock And Alarm (VGLA).









Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

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

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