Data Link Connector: Description and Operation

Fig. 3 Data Link Connector:

PURPOSE
Communication link to Powertrain Control Module (PCM)

Technician can access 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).

Technician can actuate most PCM output devices.

SCI Receive-PCM Input
SCI Receive is the serial data communication receive circuit for the DRB scan tool. The Powertrain Control Module (PCM) receives data from the DRB through the SCI Receive circuit.

NOTE: Monitoring inputs, reading memory -- other than codes -- and actuating output devices can only be accomplished through the use of a scan tool. SEE Computers and Control System/Testing and Inspection.