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Power Transistor Test

  1. Remove the passenger's dashboard undercover (see GLOVE BOX DAMPER REPLACEMENT ).
  2. Disconnect the 5P connector from the power transistor.
  3. Measure the resistance between terminals No. 1 and No. 4 of the power transistor. It should be about 1.5 kΩ.
    • If the resistance is within the specifications, go to step 4.
    • 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.
    Fig 1: Measuring Resistance Between Terminals No. 1 And No. 4 Of Power Transistor
    G08071079Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Reconnect the 5P connector to the power transistor.
  5. Disconnect climate control unit connector A (32P).
  6. Connect climate control unit connector A (32P) terminals No. 15 and No. 28 with a jumper wire.
    Fig 2: Connecting Climate Control Unit Connector A (32P) Terminals No. 15 And No. 28 With Jumper Wire
    G08071080Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, 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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