2006 Mazda 6 MazdaspeedFACTORY OEM SERVICE PROCEDURE

Cooling Fan Control System Inspection: Notes

  1. Connect the WDS or equivalent to the DLC-2.
  2. Start the engine and warm it up to normal operating temperature.
  3. Perform the KOER self-test.

    (See KOEO/KOER SELF TEST ).

  4. Verify that the DTC P0480 is not shown and the cooling fan operates during the KOER self-test.
    • If DTC P0480 is shown, perform the DTC troubleshooting procedure. (See DTC P0480 ).
    • If the cooling fans do not operate, proceed to the following:
    1. Verify the clicking sound of the cooling fan relay when the ignition switch is turned from the off to the ON position.
    2. If there is no the clicking sound, inspect the cooling fan relay for an open circuit between the ignition switch and the cooling fan relay.
      • If there is a clicking sound, go to the next step.
      • Inspect the following parts in the indicated order in accordance with fan operation conditions.
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.

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