Signal Too Low

Signal too low

Checking signal from ignition switch




- Ignition on.




- Go into rolling values.
- Read off key status.
The value should be HIGH.

Is the value HIGH?

Yes - Intermittent fault

No - Checking connectors

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Checking connectors




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




- Go into rolling values.
- 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 Removal and Replacement.
- Disconnect the yellow cable from ignition switch terminal S.
- Ignition on.




- Go into rolling values.
- 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 Removal and Replacement.

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 cable between ignition switch terminal S and fuse 18, and 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.









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.




- Go into scrolling values.
- Read off key status.
The value should be HIGH.

Is the reading OK?

Yes - FAULT FOUND

No - Fault-tracing information

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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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Intermittent fault
Check cable between ignition switch terminal 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.





Continue - Fault-tracing information

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Fault-tracing information
Information
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