Signal Too Low

Signal too low

Checking the function, childlock switch




- Ignition on
- Check that all doors are shut.
Try locking the rear doors to, and unlocking them from, the child safe position using the childlock switch.

Is the function OK?

Yes - Intermittent fault

No - Checking the childlock switch

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Checking the childlock switch




- Remove the childlock switch
- Disconnect the childlock switch.
Read off the childlock switch status.
If the value is now HIGH it means that the childlock switch is defective.





Is the value correct?

Yes - Replacing the component

No - Checking the wiring

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Replacing the component
Try a new childlock switch.





Select Continue.

Continue - Verification

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Checking the wiring




Check the cable between control module terminal #A21 and childlock switch terminal #3 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
- To connect the breakout box, see Connecting the breakout box, lock and alarm (VGLA) Connecting The Breakout Box, Lock And Alarm (VGLA).









Select "Continue" when the fault has been remedied.

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:








- Reinstall the connectors, components etc.
- Ignition on.
Read off the childlock switch status.
The value should be HIGH when the childlock switch is unaffected and LOW when it is pressed to the locking position.





Is the value correct?

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the function, childlock switch

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Intermittent fault
Check the cable between VGLA control module terminal #A21 and childlock switch terminal #3 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
- To connect the breakout box, see Connecting the breakout box, lock and alarm (VGLA) Connecting The Breakout Box, Lock And Alarm (VGLA).









Select Continue.

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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FAULT FOUND - FAULT FOUND

Attempt New Test - Checking the function, childlock switch

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