Service Precautions

Before proceeding with diagnosis, observe following precautions:

• Vehicle must have a fully charged battery and functional charging system.
• Probe PCM connector from pin side. DO NOT backprobe PCM connector.
• DO NOT cause short circuits when performing electrical tests. This will set additional trouble codes, making diagnosis of original problem more difficult.
• Always repair lowest trouble code number displayed by Malfunction Indicator Light (MIL) or first trouble code displayed by DRB.
• Always perform TEST SC-VER, VERIFICATION PROCEDURE after repairs are made.