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.
2012 Mazda 6 L4-2.5LFACTORY OEM SERVICE PROCEDURE
Radiator Cooling Fan Control Module: Testing and Inspection
FAN CONTROL MODULE INSPECTION [MZR 2.5]
1. Connect the M-MDS to the DLC-2.
2. Start and warm up the engine.
3. Monitor the engine coolant temperature with the M-MDS.
4. Measure the voltage at terminal A of the fan control module connector (2 terminals) as shown in the table.
- If not within the specification, inspect the input signals from the following parts.
- Engine Coolant Temperature (ECT) sensor
Fan control module [A/C OFF]
5. If all the above parts are normal, replace the fan control module.
Factory Service Tools
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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.