Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-U046900

Condition




The Engine control module (ECM) regulates the alternator's charge voltage, via LIN communication, on the request of the Central electronic module (CEM), via CAN communication.
The diagnostic trouble code is stored if the control module detects:
- Communication interference with the Alternator control module (ACM).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Engine running.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute value
- The alternator control module (ACM) (charge regulator) charges with a fixed voltage of 13.8 V.

Possible source
- Internal fault in another control module in the same part of the LIN network.
- Damaged alternator control module (ACM) (charge regulator).

Fault symptom[s]
- Battery/Dead battery
- Battery/Weak or low electrical power