Signal Too High or Signal Missing. Permanent Fault

Signal too high or signal missing. Permanent fault

Checking the signal cable




- Ignition off
- Disconnect the 20-pin connector (group A) from the central electronic module (CEM)
- Disconnect the 1-pin connector from the generator (GEN) (1B).
Check the signal cable between central electronic module (CEM) terminal #5A and generator (GEN) terminal #1B (the red / white cable with flat pin). Check for a short-circuit to supply voltage. Check for an open-circuit.
In the event of an open-circuit, also check connectors 54/1 and 54/3.
Remedy as necessary.

Other information:
- To access the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- The generator (GEN) connector for gasoline engines, see Generator, replacement Service and Repair
- The generator (GEN) connector for diesel engines, see Generator (GEN), replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.









Is the signal cable OK?

Yes - Replacing the component

No - Verification

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Replacing the component
Replace the governor on gasoline engines. See Governor, replacement Service and Repair.
Replace the governor on diesel engines. See Governor, replacing Service and Repair.


Continue - Verification

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Verification




Verification

Verification

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




- Ignition off.
- Connect connectors, install components, etc.
Switch ignition on and off several times. Check that diagnostic trouble code status has changed from Permanent to Intermittent.





Is the status of the diagnostic trouble code Intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the signal cable

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