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Home >> Toyota >> 2007 >> Sequoia 2WD V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Heating and Air Conditioning >> Power Transistor HVAC >> Testing and Inspection
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Power Transistor HVAC: Testing and Inspection

INSPECTION

1. INSPECT POWER TRANSISTOR




a. Connect the positive (+) lead to terminal 1 through a 12 V -3.4 W test bulb and the negative (-) lead to terminal 4.
b. Check the test bulb lights up when another positive (+) lead is connected to terminal 2 through a 12 V - 3.4 W test bulb.

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




c. Measure the resistance between terminals 3 and 4.

Standard resistance: 2.0 to 2.4 kohms

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