Diagnostic Trouble Code (DTC) Information

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.