Diagnostic Aids

When attempting to diagnose an intermittent problem, use scan tool to review malfunction history information. This data can be used to duplicate a problem.

Check for backed-out or damaged terminals, or for proper terminal connection. Check for stuck open EGR pintle. Check for open in circuit between EGR harness connector terminal "B" and PCM. Check for short to ground in circuit between EGR harness connector terminal "A" and PCM, which will cause severe rough idle and driveability complaint.