LS 460 V8-4.6L (1UR-FSE) (2007)
Radiator Cooling Fan Control Module: Testing and Inspection
COOLING FAN ECU
ON-VEHICLE INSPECTION
1. CHECK COOLING FAN ECU
(a)
Remove the front controller's 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 (S1).
Front View Of Wire Harness Connector
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.