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Home >> Acura >> 2009 >> TL Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System >> Climate Control >> Power Transistor Test
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Power Transistor Test

  1. Remove the passenger's dashboard undercover (see PASSENGER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION )
  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 1 And 4 Of Power Transistor
    G05988687Courtesy 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 15 And 28 With Jumper Wire
    G05988688Courtesy 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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