On-Vehicle Inspection

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT CONDENSER FAN OPERATION
Inspect the fan operation, as shown in the chart below.

Test conditions:

Engine coolant temperature "Below 82 °C (180 °F)"

Fig 1: Condenser Fan Operation Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If operation is not as specified, proceed next inspection.
INSPECT CONDENSER FAN MOTOR OPERATION
1. Remove air inlet duct.
2. Disconnect the 2 connector.
3. Connect battery and ammeter.
4. Check that the fan rotates smoothly, and then check the reading on the ammeter.
Fig 2: Inspecting Condenser Fan Motor Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Specified Amount: 9.2-11.0 A at 20 °C (68°F)

If operation is not as specified, replace the fan motor.
INSPECT COOLING FAN COMPUTER WIRE HARNESS
1. Remove air inlet duct.
2. Disconnect the 2 connector.
3. Inspect the connector on wire harness side.
4. 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.