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.
Cooling Fan Logic
PCM will energize cooling fan relay when an A/C request signal is received from A/C switch, or when coolant temperature is greater than 223°F (106°C). Fan will operate for 180 seconds after A/C request signal is canceled. PCM will de-energize cooling fan relay when vehicle speed is greater than 70 MPH for 180 seconds. Cooling fan relay is located in underhood junction block.
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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.