Fault-Tracing

Fault tracing DEM-P056017

Checking the power supply








- Ignition on
- Read the value of the supply voltage to the Differential Electronic Module (DEM).
The voltage should be about the same as the battery voltage.

Hint: Compare with the voltage supply to the Central Electronic Module (CEM).

- Start the engine and allow it to idle.
- Read once again the value of the supply voltage to the Differential Electronic Module (DEM).
The voltage should rise to 13-15 V, depending on the alternator charging voltage.

Hint: As the fault can be caused by a too high charging voltage from the alternator, this should also be checked

Remedy as necessary.

Other information:
- Signal specification
- Checking wiring and terminals Checking Wiring and Terminals









Continue - Verification

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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 the value of the supply voltage to the Differential Electronic Module (DEM).
The voltage should be approx. the same as the battery voltage.





Is the voltage OK?

Yes - Troubleshooting procedure complete

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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Attempt New Test - Checking the power supply

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