G 1500 1/2 Ton Van V6-4.3L VIN W (1997)
Information Bus: Description and Operation
Circuit Operation
The Data Link Connector (DLC) is provided to enable communications with specific control modules using an external Scan Tool. The use of the Scan
Tool in control module diagnostics is described in the Engine Controls, Supplemental Inflatable Restraints, and Antilock Brakes. The Data Link PPL
(1807) wire allows internal and external Class II communications between control modules as well as with the external Scan Tool. Module to module
communications are described and diagnosed. A module to module communication failure due to wiring problems will also result in communications
failures with the Scan Tool. The Data Link TAN/WHT (799) 9600 baud rate and TAN (800) 8192 baud rate wires allows internal and external Universal
Asynchronous Receiver/Transmitter (UART) communications with the external Scan Tool.
DLC Cavity 8 for the BLK/WHT (1455) wire is used for programming Remote Control Door Lock Reciever for new transmitters. Refer to Keyless
Entry for additional information. See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry
