Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the ignition lock wire




- Ignition off.
Apply the brake then release the brake to check whether the brake light works correctly. If the high level brake light is not working, the fault may be caused by overheating. Wait about 10 minutes and check whether the fault was caused by overheating.
If the brake light works, the diagnostic trouble code may also be caused by a fault in the lighting circuit to the ignition lock. If the ignition lock light does not work correctly, check the wire between central electronic module (CEM) 19D and ignition lock light (16/65) 5 for a short circuit to ground as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Do the necessary corrective action.













Are there any faults with the wire?

Yes - Information

No - Checking the brake light wire

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Checking the brake light wire




- Ignition off.
After it has cooled, check the wire between central electronic module (CEM) 5B and high level brake light (10/19) 5 for a short circuit to ground as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Also check connector 54/13 11.

Additional information:
- For information on the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing.
- To connect the test box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM).
- For information on signals, see Signal specification Pinout Values and Diagnostic Parameters.














Continue - Information

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Information




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
Read the diagnostic trouble codes.
If diagnostic trouble code has changed to intermittent status this indicates that the fault is no longer activated.





Is the diagnostic trouble code intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Trouble-shooting information

VERIFIED - Fault Found

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Trouble-shooting 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 ignition lock wire

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