Data Link Connector

Data Link Connector:

CIRCUIT DESCRIPTION
Circuit F86 supplies battery voltage to the data link connector. Circuit F86 originates at fuse 6 in the Power Distribution Center (PDC).

Circuit A21 from the ignition switch powers fuse 6 when the switch is in the START or RUN positions. In the START or RUN position the ignition switch connects circuit Al from fuse 12 in the PDC with circuit A21.

Circuit D84 connects to cavity 25 of the PCM. Circuit D84 is the SCI receive circuit for the PCM.

Circuit D83 connects to cavity 45 of the PCM. Circuit D83 is the SCI transmit circuit for the PCM.

Circuit Z12 provides ground for the data link connector. Circuit Z12 also connects to cavities 5, 11 and 12 of the PCM to provide the power (device) ground.

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.