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Home >> Acura >> 2007 >> TL V6-3.5L >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Component Tests and General Diagnostics >> Power Transistor Test
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Power Transistor Test

Power Transistor Test

1. Disconnect the 4P connector from the power transistor.




2. Measure the resistance between the No. 1 and No. 2 terminals of the power transistor. It should be about 1.5 kohms.
- If the resistance is within the specifications, go to step 3.
- If the resistance is not within the specifications, replace the power transistor.

NOTE: Also check the blower motor. Power transistor failure can be caused by a defective blower motor.




3. Carefully release the lock tab on the No. 4 terminal (BLU/YEL) (A) in the 4P connector, then remove the terminal and insulate it from body ground.
4. Reconnect the 4P connector to the power transistor.
5. Make sure the BLU/YEL wire is completely isolated, then supply 12 volts to the No. 4 cavity with a jumper wire.
6. Turn the ignition switch ON (II), and check that the blower motor runs.
- If the blower motor does not run, replace the power transistor.

NOTE: A faulty blower motor can cause the power transistor to fail. If the power transistor is replaced, also check the blower motor for binding, and replace it if necessary.

- If the blower motor runs, the power transistor is OK.
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