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.
Fuel Injector Interface Module
The fuel injector interface module receives input from the powertrain control module (PCM). Based on the information received and programmed into its memory, the fuel injector interface module generates output signals to control the fuel injector solenoids. The fuel injector interface module contains a set of drivers for both the primary (forward) and secondary (rearward) fuel injectors. The fuel injector driver signals from the PCM are used to control both sets of output drivers in the fuel injector interface module. Based on the fuel selector switch input, the fuel injector interface module controls either the primary or both the primary and secondary fuel injectors.
Use the Manual With the Right Hardware
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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.