Cooling Fan Control System Inspection

Start the engine and warm it up to normal operating temperature.
Perform the KOER self test. (See KOEO/KOER SELF TEST .)
Verify that the DTC P0480:00 is not shown and the cooling fan operates during the KOER self test.
- If the DTC P0480:00 is shown, perform the DTC inspection. (See DTC P0480:00 .)
- 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 fan control module and battery positive terminal
    - Open circuit between fan control module and ground
    - Poor connection of the fan control module connector
  - If there is no malfunction:
    - Replace the cooling fan component. (See COOLING FAN COMPONENT REMOVAL/INSTALLATION .)