Faulty Signal or Signal Missing

Faulty signal or signal missing

Checking the component and wiring
Check the battery voltage and condition.
Check the charging function of the generator (GEN).
Check the power cable between engine control module (ECM) terminal #B4 (#C4) and the system relay. Check for an open-circuit.
Check the signal cable between engine control module (ECM) terminal #B16 (#C16) and the system relay. Check for an open-circuit.
Check the engine control module (ECM) and the system relay connector. Check for contact resistance. Check for oxidation.
Try a new system relay if no fault is found during the above fault-tracing.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- For further information about the fuses and relays, see the Wiring Diagram.
- Checking wiring and terminals Checking Wiring and Terminals










Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read off the battery voltage.
Check that the battery voltage is correct.





Is the value correct?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - 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 component and wiring

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