Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the connectors




- Ignition off.
Check central electronic module (CEM) connector for contact resistance and oxidation, as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check especially for any damage.

Hint: If cause of fault is found, then install the components, connect the connectors, etc. If cause of fault is not found, do not install control unit until you have completed the trouble-shooting.

Additional information:
- To access/replace the CEM connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing.





Is there a fault?

Yes - Verification

No - Checking the component and wire

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Checking the component and wire




- Ignition off.
Check the wire between central electronic module (CEM) connector #2B and ignition lock #x for an open circuit as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for a short circuit to ground as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Also check that fuse 11C/7 is intact. Replace fuse if necessary.

Additional information:
- The voltage should be the same as the battery voltage if the key is in position I or II.
- To access/replace the CEM connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- To connect the test box to the control unit, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM).
- For information about signals and other values, see Signal specification Signal Specification













Is the voltage the same as the battery voltage?

Yes - Verification

No - Replacing the component

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Replacing the component
Test by replacing the ignition lock connector as described in Steering-column lock replacement Steering-Column Lock Replacement

Continue - Verification

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Verification




Verification

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








- Ignition off.
- Connect connectors, install components, etc.
- Ignition on.
Check that X-voltage is OK.





Is voltage on the wire high?

Yes - Verification completed

No - Trouble-shooting information

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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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the connectors

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