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Serial Communication

ECM (Engine Control Module) communicates serially with the following:

Immobilizer 

The request and exchange of information between the engine control module (ECM) and the Immobilizer.

Data Link Connector (DLC) 

The serial communication via the data link connector (DLC) (pin 7, C-line) is only used by the authorities and certain other workshops in the USA/CDN for reading off OBD II codes using the Generic Scan Tool.

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