Diagnostic trouble code (DTC) status ECM-900E Engine control module (ECM), internal fault. Faulty signal

Reading off DTC status ECM-900E 

• NOTE:

  When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will be listed.

• Read off the diagnostic trouble code (DTC) status. Check the status of the relevant diagnostic trouble code (DTC).

Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was the status of the relevant diagnostic trouble code (DTC) permanent? 

• YES 

  Refer to Replacing the engine control module (ECM) and programming 

• NO 

  Refer to Fault-tracing information