Last Modified: 4-30-2014 6.6 G Doc ID: RM0000018PR001X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: AIR CONDITIONING: REAR COOLING UNIT: INSPECTION; 2006 MY LX470 [05/2005 -        ]

INSPECTION

1. INSPECT BLOWER MOTOR

(a) Connect the battery positive (+) lead to terminal 1 and battery negative (-) lead to terminal 2, and then check that the motor rotates smoothly.

If the motor rotates smoothly, check the wire harness. Otherwise, replace the blower motor.

2. INSPECT THERMISTOR

(a) Place the thermistor in cold water.

(b) Measure resistance of the thermistor as the water temperature increases.

(c) Compare the readings with the chart.

If the values meet the specifications, check the wire harness. Otherwise, replace the thermistor.

3. INSPECT EXPANSION VALVE

(a) Check the air passage through the valve, with and without the battery positive voltage applied, between terminals as shown in the chart.

OK:

Condition

Air Passage

Apply B+ between terminals

Free passage

Not apply B+ between terminals

No passage

If the operation is as specified, check the wire harness.

Otherwise, replace the magnetic valve with the expansion valve.