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.