Service Precautions

WARNING: Vehicle is equipped with an air bag. Air bag must be deactivated before servicing cruise control components on or around steering column. See AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section.

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 the GENERAL INFORMATION section before disconnecting battery.

NOTE: When using diagnostic tests, DO NOT skip any test steps or incorrect diagnosis may result.

Before proceeding with diagnosis, the following precautions must be followed:

Vehicle must have a fully charged battery and functional charging system (belt installed and all wiring connected).
DO NOT backprobe PCM connector. Probe PCM connector from terminal side.
DO NOT cause short circuits when performing electrical tests. This will set additional trouble codes, making diagnosis of original problem more difficult.
DO NOT use a test light in place of a voltmeter.
ALWAYS repair lowest trouble code number first when using MIL method. Repair first trouble code displayed when using scan tool.
Always perform TEST VER-4A, VERIFICATION PROCEDURE under SELF-DIAGNOSTIC TESTS after repairs are made.