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 [PCM (VIN L (WITHOUT CYLINDER DEACTIVATION))] .)
Verify that DTC P0480:00 is not shown and the cooling fan operates during the KOER self test.
- If the DTC P0480:00 is displayed, perform the DTC inspection. (See DTC P0480:00 [PCM (VIN L (WITHOUT CYLINDER DEACTIVATION))] .)
- 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 [VIN L (WITHOUT CYLINDER DEACTIVATION)] .)