Blower Power Transistor Test

NOTE: Before testing the power transistor, check for climate control DTCs.

2. Blower Power Transistor - Test
1.
Disconnect the blower power transistor connector.
2.
Measure the resistance between terminals No. 2 and No. 4 of the blower power transistor. It should be about 1.5 k?.
If the resistance is within the specifications, go to step 3.
If the resistance is not within the specifications, replace the blower power transistor.
NOTE: Also check the blower motor. Blower power transistor failure can be caused by a defective blower motor.
3.
Reconnect the blower power transistor connector.
4.
Disconnect the following connectors.
Climate control unit connector A (32P)
Climate control unit connector B (24P)
5.
Connect climate control unit connector A (32P) terminal No. 32 and climate control unit connector B (24P) terminal No. 11 with a jumper wire.
6.
Turn the vehicle to the ON mode.
7.
Check that the blower motor runs.
If the blower motor does not run, replace the blower power transistor.
NOTE: A faulty blower motor can cause the blower power transistor to fail. Before replacing the blower power transistor, check the blower motor for binding, and replace the blower motor if necessary.
If the blower motor runs, the blower power transistor is OK.

3. All Removed Parts - Install
1.
Install the parts in the reverse order of removal.