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Home >> Lexus >> 2000 >> LX 470 V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Heating and Air Conditioning >> Power Transistor HVAC >> Testing and Inspection >> Power Transistor (For Rear Cooler)
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Power Transistor (For Rear Cooler)

1. REMOVE REAR DOOR SCUFF PLATE RH
2. REMOVE REAR FLOOR MAT SUPPORT PLATE
3. REMOVE QUARTER TRIM PANEL RH




4. REMOVE POWER TRANSISTOR
a. Disconnect the connector.
b. Remove the 2 screws and power transistor.




5. INSPECT POWER TRANSISTOR OPERATION
a. Connect the positive (+) lead to terminal 1 through a 12 V - 3.4 W test bulb and negative (-) lead to terminal 2.
b. Check the test bulb lights up when another positive (+) lead is connected to terminal 4 through a 12 V - 3.4 W test bulb.
If operation is not as specified, replace the power transistor.




6. INSPECT POWER TRANSISTOR RESISTANCE
Measure resistance between terminals 3 and 4.

Standard resistance: 2.0 - 2.4 k Ohms

If resistance is not as specified, replace the power transistor.

7. INSTALL POWER TRANSISTOR
a. Install the power transistor with 2 screws.
b. Connect the connector.
8. INSTALL QUARTER TRIM PANEL RH
9. INSTALL REAR FLOOR MAT SUPPORT PLATE
10. INSTALL REAR DOOR SCUFF PLATE RH
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