LS 460 AWD V8-4.6L (1UR-FSE) (2009)
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Radiator Cooling Fan Control Module: Testing and Inspection
1UR-FSE COOLING: COOLING FAN ECU: ON-VEHICLE INSPECTION
ON-VEHICLE INSPECTION
1. CHECK COOLING FAN ECU
(a) Remove the front controller cover.
(b) Using 2 screwdrivers, detach the 2 claws and disconnect the front controller.
HINT: Tape the screwdriver tips before use.
(c) Check the resistance of the wire harness between the front controller B14-22 (FAN1) and cooling fan ECU A9-2 (SI).
Standard resistance:
If the result is not as specified, repair or replace the wire harness or connector.
(d) Check the output signal from the front controller.
HINT: Be sure to perform the inspection when the engine coolant temperature is less than 92°C (198°F).
(1) Set the oscilloscope probe to the terminal B14-22 (FAN1) of the front controller.
