Description & Operation
WARNING:
Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in AIR BAG RESTRAINT SYSTEM
article in RESTRAINTS.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION before disconnecting battery.
The data stream on the 800 circuit is transmitted at 8192 baud. During normal operation, the PCM is the master module. When the scan tool is plugged in, the scan tool is the master module and can interrogate any modules on the 800 circuit.