Diagnostic Tests: Notes

WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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.

CAUTION: Static electricity can destroy integrated circuits in Instrument Panel Cluster (IPC). Before servicing this component, ground yourself and work area to discharge static electricity.

CAUTION: When using scan tool, exit all scan tool tests before cycling ignition switch from OFF to ON position unless scan tool instructions indicate otherwise. Follow all scan tool manufacturer's instructions, or DTCs (actual or false) may set, vehicle systems may malfunction or scan tool may malfunction.

NOTE: Unless otherwise specified, make all voltage and resistance measurements with a Digital Volt-Ohmmeter (DVOM) having an input impedance of 10 megohms or greater.

NOTE: For component locations, see COMPONENT LOCATIONS . For wiring and circuit identification, see WIRING DIAGRAMS . For connector terminal identification, see CONNECTOR IDENTIFICATION .