Diesel Data: Automotive Repair
Home >> Lexus >> 2001 >> LS 430 V8-4.3L (3UZ-FE) >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Radiator Cooling Fan >> Radiator Cooling Fan Motor >> Testing and Inspection >> Component Tests and General Diagnostics

Component Tests and General Diagnostics

ON VEHICLE INSPECTION
1. INSPECT ELECTRIC COOLING FAN OPERATION
Inspect the fan operation.





Test conditions: If operation is not as specified, proceed next inspection.





2. INSPECT ELECTRIC COOLING FAN MOTOR OPERATION
a. Remove air inlet duct.
b. Disconnect the 2 connector.
c. Connect battery and ammeter.
d. Check that the fan rotates smoothly, and then check the reading on the ammeter.
Specified amount: 9.2 - 11.0 A at 20 °C (68°F)
If operation is not as specified, replace the fan motor.





3. INSPECT COOLING FAN COMPUTER WIRE HARNESS
a. Remove air inlet duct.
b. Disconnect the 2 connector.
c. Inspect the connector on wire harness side.
d. Measure voltage between terminals 1 and 3.
Voltage: 9 - 14 V
If operation is not as specified, check the fuse, relay and wire harness.
If operation is as specified, replace the cooling fan computer.

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