Engine Controls - Pin Voltage Charts: Introduction

Pin voltage charts are used for diagnosing intermittent symptoms and faults that are unable to be resolved during self-diagnostics. Pin voltage testing ensures the Powertrain Control Module is receiving and transmitting proper voltage signals. Before attempting pin voltage diagnostics, ensure mechanical conditions have been thoroughly inspected and self-diagnostics has been attempted. Service bulletins may also be helpful in correcting a hard to diagnose problem.