Radiator Cooling Fan Control Module: Testing and Inspection

2GR-FE COOLING: COOLING FAN ECU: ON-VEHICLE INSPECTION

1. INSPECT COOLING FAN ECU

(a) Put the vehicle in the following conditions:

(1) Turn the engine switch off.

(2) The coolant temperature is less than 95°C (203°F).

(3) The battery voltage is between 9 and 14 V.

(4) The A/C switch is off.

(b) Clamp the 400 A probe of an ammeter over the M+ wire of each cooling fan motor.

(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 is stopped with the engine idling.

HINT
* Make sure that the radiator engine coolant temperature is less than 95°C (203°F).
* Make sure that the A/C switch is 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 95°C (203°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.





HINT
* The coolant temperature at which the fan starts operating is approximately 97°C (207°F).
* This system can also be checked using the Techstream.
* Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.