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.
Component Function Check
- CHECK COOLING FAN LOW SPEED FUNCTION
With CONSULT-III
- Turn ignition switch ON.
- Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-III and touch "LOW" on the CONSULT-III screen.
- Check that cooling fans operates at low speed.
Without CONSULT-III
- Start engine and let it idle.
- Turn air conditioner switch and blower fan switch ON.
- Check that cooling fan operates at low speed.
Is the inspection result normal?
YES: GO TO 2.
NO: Check cooling fan low speed control circuit. Refer to "PROCEDURE A " in "DIAGNOSIS PROCEDURE ".
- CHECK COOLING FAN HIGH SPEED FUNCTION
With CONSULT-III
- Touch "HI" on the CONSULT-III screen.
- Check that cooling fans operates at higher speed than low speed.
Without CONSULT-III
- Turn ignition switch OFF.
- Turn air conditioner switch and blower fan switch OFF.
- Disconnect engine coolant temperature sensor harness connector.
- Connect 150Ω resistor to engine coolant temperature sensor harness connector.
- Restart engine and check that cooling fan operates at higher speed than low speed.
Is the inspection result normal?
YES: INSPECTION END
NO: Check cooling fan high speed control circuit. Refer to "PROCEDURE B " in "DIAGNOSIS PROCEDURE ".
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.
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