Engine Controls - Pin Voltage Charts - Turbo: Introduction

Pin voltage, resistance and continuity (value) charts are used for diagnosing intermittent symptoms and faults that are unable to be resolved during self-diagnostics. Pin voltage tests ensure the Engine Control Module (ECM) is receiving and transmitting proper voltage and other signals. Before performing pin voltage, resistance and continuity tests, ensure engine mechanical condition has been thoroughly inspected and self-diagnostics have been attempted. Technical Service Bulletins (TSBs) may also be helpful in correcting a hard to diagnose problem.