Signal Too Low

Signal too low

Checking the signal from the inner central locking switch
Read off the central locking switch status when the switch is in center position.
The value of both signals should be HIGH.





Is the value of both signals HIGH?

Yes - Intermittent fault

No - Checking the central locking switch

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Checking the central locking switch




- Remove the central locking switch from the driver's door according to Door panel switch, replacement Removal and Replacement.
- Disconnect the central locking switch.
Read off the central locking switch status when the switch is in center position.





Is the value of both signals HIGH?

Yes - Replacing the component

No - Checking the central locking switch

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Replacing the component
Replace the central locking switch for the driver's door according to Door panel switch, replacement Removal and Replacement.

Continue - Verification

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Checking the central locking switch




- Remove the central locking switch from the passenger door.
- Disconnect the central locking switch.
Read off the central locking switch status when the switch is in center position.





Is the value of both signals HIGH?

Yes - Replacing the component

No - Checking cables

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Replacing the component
Replace the central locking switch for the passenger door.

Continue - Verification

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Checking cables




Check the cables between control module #A18 and driver's door central locking switch #C2, between control module #4 and driver's door central locking switch #C2, between control module #A16 and driver's door central locking switch #C4, between control module #A16 and passenger door central locking switch #C3 and between control module #A4 and passenger door central locking switch #C5 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.





Continue - Verification

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Verification

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








- Reinstall the connectors, components etc.
- Ignition on.
Read off the central locking switch status when the switch is in center position.
The value of both signals should be HIGH.





Is the value of both signals HIGH?

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 inner central locking switch

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Intermittent fault
Check the cable between VGLA control module terminal #17A and the tilt sensor for an intermittent short-circuit to ground. Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check the cables between control module #A18 and driver's door central locking switch #C2, between control module #4 and driver's door central locking switch #C2, between control module #A16 and driver's door central locking switch #C4, between control module #A16 and passenger door central locking switch #C3 and between control module #A4 and passenger door central locking switch #C5 for an intermittent 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.





Continue - Fault-tracing information
No Fault Found

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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 inner central locking switch

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