Engine Controls - Pin Voltage Charts: Introduction

The following tables identify Powertrain Control Module (PCM) terminal/pin wire colors and circuit usage. They can be used for diagnosing intermittent symptoms and faults that are unable to be resolved during self-diagnostics. Pin voltage (value) tests ensure PCM is receiving and transmitting proper voltage and other signals. Before performing pin voltage (value) tests, ensure engine mechanical condition has been thoroughly inspected and self-diagnostics has been attempted. Technical Service Bulletins (TSBs) may also be helpful in correcting a hard to diagnose problem.