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.

2016 Mazda 6 Grand TouringFACTORY OEM SERVICE PROCEDURE

Cooling Fan Control System Inspection

Connect the M-MDS to the DLC-2.
Start the engine and warm it up to normal operating temperature.
Perform the KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 2.5] .)
Verify that DTC P0480:00 or P0482:00 is not shown and the cooling fan operates during the KOER self test.
- If the DTC P0480:00 or P0482:00 is displayed, perform the DTC inspection. (See DTC P0480:00 [SKYACTIV-G 2.5] .) (See DTC P0482:00 [SKYACTIV-G 2.5] .)
- If the cooling fans do not operate, proceed to the following:
  - Inspect the following parts in the indicated order in accordance with fan operation conditions.
    - Open circuit between cooling fan relay and battery positive terminal
    - Open circuit between cooling fan relay and ground
    - Poor connection of the cooling fan relay
  - If there is no malfunction:
    - Replace the cooling fan component. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)

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.