Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Chart A2-5, Fuel Injector Circuit Check (Engine No-Start): Notes
With ignition switch in ON or START position (engine running), PCM will energize/de-energize fuel injector solenoid coil. With coil energized, a plunger is activated, allowing pressurized fuel to be sprayed through fuel injectors into combustion chamber where it is mixed with air from intake manifold, creating proper air/fuel mixture needed for combustion.
- Checks if PCM is controlling ground path of fuel injectors.
- Checks resistance of fuel injectors.
- Checks for an open or short to ground in Black or Black/Red wire between fuel injectors and PCM, or for faulty fuel injectors or PCM.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.