Service Precautions

Before proceeding with diagnosis, observe following precautions.

• Vehicle must have a fully charged battery and functional charging system.
• Probe PCM 60-pin connector from pin side. DO NOT  backprobe the PCM connector.
• DO NOT  cause short circuits when performing electrical tests. This will set additional fault codes, making diagnosis of original problem more difficult.
• Always repair lowest fault code number (CHECK ENGINE light) or first fault displayed (DRB-II) before repairing others.
• Always perform TEST SC-VER  after repairs are made.