S10/T10 P/U 2WD V6-4.3L VIN W (1997)
Information Bus: Description and Operation
Circuit Operation
A Scan Tool can be connected to the DLC; this allows the Scan Tool to communicate with either the PCM, DERM and/or VCM. System operations can
then be monitored for diagnostic purposes.
There are two data lines access with a Scan Tool. Circuit 800 (TAN) UART data line allows the Inflatable Restraint Diagnostic Energy Reserve Module
to communicate with the Scan Tool. Circuit 1807 (PPL) CLASS-2 data line allows the Powertrain Control Module or Vehicle Control Module to
communicate with a Scan Tool.
