Diagnostic trouble code (DTC) information
Condition
The engine control module (ECM) and transmission control module (TCM) communicate via a standardized serial interface. Both the control modules transmit and receive information. One of the diagnostic trouble codes (DTC) ECM-DC/DD/DE/E0 is stored if communication is interrupted or ceases.
Substitute Value
- Turbocharger (TC) control disabled
- Ignition retardation.
Possible Source
- Open-circuit in one or both signal cables
- One or both signal cables short-circuited to ground, voltage or each other
- Contact resistance in the terminals
- Defective engine control module (ECM) or transmission control module (TCM).
Fault symptom[s]
- Poor performance
- Harsh gear shifting.