Signal Too Low

Signal too low

Checking the signal from the ignition switch




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





Is the value HIGH?

Yes - Intermittent fault

No - Checking the connectors

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Checking the connectors




- Ignition off.
- Check ignition switch #S and the control module connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Ignition on.
Read off key status.





Is the value HIGH?

Yes - FAULT FOUND

No - Checking ignition switch

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Checking ignition switch




- Expose ignition switch according to Replacing the steering column Replacing the Steering Column.
- Disconnect the yellow cable from ignition switch #S.
- Ignition on.
Read off key status.





Is the value HIGH?

Yes - Replacing component

No - Checking cables

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Replacing component
Try a new ignition switch according to Replacing the steering column Replacing the Steering Column.

Continue - Intermittent fault

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Checking cables
Check fuse 18.

Hint: If the fuse is blown, check the circuit after fuse 18 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , then replace fuse.

Check the cable between ignition switch #S and fuse 18, and the cable between fuse 18 and control module #B10 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

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 connectors, components etc.
- Ignition on.
Read off key status.
The value should be HIGH.





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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Attempt New Test - Checking the signal from the ignition switch

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Intermittent fault
Check the cable between ignition switch #S and fuse 18, and fuse 18 and VGLA control module #B18 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check ignition switch terminal S and control module connector for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and contact resistance and oxidation 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 ignition switch

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