Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
This diagnostic trouble code (DTC) indicates that the configuration between the engine control module (ECM) and the immobilizer does not correspond.
The immobilizer transmits the VIN code to the engine control module (ECM) at start attempt. Diagnostic trouble code (DTC) ECM-720A is stored in the engine control module (ECM) if the engine control module (ECM) interprets the code as faulty or missing. The engine control module (ECM) will not allow the engine to be started.

Substitute value
none

Possible source

Faulty signal:
- an engine control module (ECM) that does not correspond to the immobilizer code has been installed
- an immobilizer that does not correspond to the engine control module (ECM) code has been installed
- defective immobilizer
- defective engine control module (ECM)
- open-circuit in the communication between the immobilizer and engine control module (ECM).

Fault symptom[s]
- engine does not start