Radiator Cooling Fan: Testing and Inspection

1UR-FSE COOLING: COOLING FAN SYSTEM: ON-VEHICLE INSPECTION

1. CHECK COOLING FAN SYSTEM

(a) Put the vehicle in the following conditions:

(1) The engine switch is off.

(2) The coolant temperature is less than 92°C (198°F).

(3) The battery voltage is between 11 and 14 V.

(4) The A/C switch is OFF.

(b) Connect the 400 A probe of an ammeter to terminals M+ and S+ of the cooling fan motors.

(c) Turn the engine switch on (IG) and wait for approximately 10 seconds. Check that the fan stops.

(d) Start the engine. Check that the fan stops with the engine idling.

HINT
* Make sure that the radiator coolant temperature is less than 92°C (198°F).
* Turn the A/C switch OFF.
(e) Check that the fan operates when the A/C switch is turned ON (MAX COOL and the magnetic clutch is operating).

Standard current:





HINT
The coolant temperature is less than 92°C (198°F).

(f) Check that the fan operates when the engine coolant temperature sensor connector is disconnected.

Standard current:





(g) After the engine is warmed up, check that the fan operates as shown in the illustration below.

HINT
* The coolant temperature at which the fan starts operating is approximately 94°C (201°F).
* This system can also be checked using the Techstream.
* Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.