Diagnostic Aids

If a short to voltage on Black wire or a shorted fuel injector exists when fuel injector is commanded on, PCM will open driver circuit for protection and current draw will be low.

An open or shorted injector circuit will cause a misfire DTC to set. Diagnose an injector DTC first if an injector and a misfire DTC are set at same time. Fuel present in oil is a good suspect of a leaking or grounded injector.

To locate an intermittent problem, start engine and use scan tool to monitor MISFIRE CURRENT CYL. #1. If a fuel injector fault exists, a misfire will occur on cylinder No. 1 and misfire counter will count up.

Fuel injector resistance should be 12-13 ohms at 74°F (23°C).