Spectrum L4-91.5 1.5L (1989)
Data Link Connector: Description and Operation
ALDL Connector
The Assembly Line Diagnostic Link (ALDL) is a diagnostic connector located in the passenger compartment. It has terminals which are used in the
assembly plant to verify that the engine is operating properly before it leaves the plant.
The ALDL Connector is also used by "Scan" tools to read information from the ECM via the Serial Data line.
