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.
Idle Air Control Solenoid
Idle Air Control (IAC) solenoid is by-pass air type. Ensure ignition switch is off. Disconnect IAC solenoid harness connector. Measure resistance between IAC solenoid connector terminals. Solenoid has a diode and resistance will be infinite if voltmeter is hooked up wrong. Connect DVOM positive lead to IAC solenoid connector VPWR terminal (Red wire on B-series, White/Red wire on Tribute) and negative lead to IAC terminal (Light Blue wire). Resistance should be 6-13 ohms. If reading is not as specified, replace IAC solenoid. If resistance is 6-13 ohms, IAC solenoid is okay. See appropriate SELF-DIAGNOSTICS article for additional testing and specifications.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.