Signal Too Low

Signal too low

Checking signal from door lock switch




- Ignition on.
Read off the control switch status
The value should be HIGH.





Is the value HIGH?

Yes - Intermittent fault

No - Checking door lock switch in lock unit

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Checking door lock switch in lock unit




- Ignition off.
- Remove driver's door panel.
- Disconnect door lock switch connector.
- Ignition on.
Read off the control switch status









Is the value HIGH?

Yes - Replacing component

No - Checking cables

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Replacing component
Try a new lock unit.

Continue - Verification

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Checking cables




- Ignition off.
For left-hand drive cars:
Check the cable between control module #A18 and the lock unit gray connector #B1 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
For right-hand drive cars:
Check the cable between control module #A18 and the lock unit gray connector #B4 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 is corrected as follows:








- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
Read off door lock switch status.
The value should be HIGH.





Is the value 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 signal from door lock switch

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Intermittent fault
For left-hand drive cars:
Check the cable between control module #A18 and the lock unit gray connector #B1 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
For right-hand drive cars:
Check the cable between control module #A18 and the lock unit gray connector #B4 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 signal from door lock switch

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