Grand Cherokee 2WD L6-242 4.0L VIN S MFI (1993)
Data Link Connector: Description and Operation
Data Link Connector
Data Link Connector
PURPOSE
Scan tool access to Powertrain Control Module (PCM) inputs and memory including:
^ Sensor input values
^ Diagnostic Trouble Codes (DTC's) stored in memory
^ Last deactivation cause (i.e.. speed control last shut off by; speed control switch, brake switch or no crank sensor signal).
Scan tool access to PCM outputs including:
^ Actuation of most PCM output devices.
^ Status of most PCM output devices.
NOTE: Monitoring inputs, reading memory and actuating output devices can only be accomplished through the use of a scan tool. SEE Computers and
Control Systems/Testing and Inspection/Procedures.
