Data Link Connector: Description and Operation

Wiring Diagram For Diagnostic Circuit:

PURPOSE


Serial Data is a single wire line that the Engine Control Module (ECM) uses to communicate and share information with other systems.


OPERATION

A Serial Data line is part of the ALDL connector and is used for hookup of test equipment.


The use of the communication line allows for the separate controlers to share information. Examples of this may be information shared with the Electronic Climate Control (ECC) panel. This shared information architecture also provides for the on-board self diagnostic capabilities of the computer control systems.