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.
Circuit Description
PCM enables an injector on intake stroke of each cylinder Ignition voltage is supplied directly to fuel injectors. PCM controls each injector by grounding control circuit via an internal switch called a driver. The driver supplies ground for component being controlled and is equipped with a fault line which is monitored by the PCM. If PCM detects that injector control circuit voltage is other than what is expected, PCM will set. Conditions for setting DTC:
- Engine speed greater than 400 RPM.
- System voltage is greater than 6 volts, but less than 18 volts.
- PCM detects wrong voltage potential on any injector driver circuit for 5 seconds.
NO RELATED
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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.