Self-Diagnostic System: Precautions

WARNING: This page is about a different car, the 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

Before proceeding with diagnosis, observe following precautions:

Ensure battery is fully charged and charging system is functional.
Probe PCM connector from pin side. DO NOT backprobe PCM connector.
DO NOT cause short circuits when performing electrical tests. This will set additional fault codes, making diagnosis of original problem more difficult.
DO NOT use a test light in place of a voltmeter.
Always begin repair with lowest fault code number (MIL) or first fault displayed (DRB).
Always perform verification test after repairs are made.
Always disconnect DRB after use.
Always disconnect DRB before charging battery.