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Home >> Lexus >> 2008 >> IS 350 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> Actuator Check

Actuator Check

  1. ACTUATOR CHECK 
    1. Start the engine and warm it up.
    2. Perform the indicator check (See CHECK MODE PROCEDURE  ).
    3. Push the "R/F" switch to perform the actuator check.

      HINT:

      Be sure to perform the actuator check after starting the engine.

      Fig 1: Identifying Control Panel (R/F (Recirculation/Fresh)" Switch)
      G05831376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. As the actuator check is repeated from steps 1 to 10 at 1 second intervals, check the temperature and air flow visually and by hand.

      HINT:

      • The display blinks at 1 second intervals in the step operation.
      • As an example, the illustration shows that display code 21 is output.
      • Push the "OFF" switch to finish panel diagnosis.
      • Push the "AUTO" switch to enter the sensor check mode.
        Fig 2: Pushing "AUTO" Switch
        G05831378Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      DISPLAY CODE DESCRIPTION

      Step No. Display Code Conditions
      Blower Level Air Mix Damper Airflow Vent Air Inlet Damper Cool Air Bypass Damper Compressor
      1 0 0 0% open FACE FRESH -14% OFF
      2 1 1 0% open FACE FRESH -14% OFF
      3 2 17 0% open FACE RECIRCULATION / FRESH -14% ON
      4 3 17 0% open FACE RECIRCULATION 113.50% ON
      5 4 17 50% open B/L RECIRCULATION 113.50% ON
      6 5 17 50% open B/L RECIRCULATION 113.50% ON
      7 6 17 50% open FOOT FRESH 113.50% ON
      8 7 17 100% open FOOT-0 FRESH 113.50% ON
      g 8 17 100% open F/D FRESH 113.50% ON
      10 9 31 100% open DEF FRESH 113.50% ON
    5. If the steps are difficult to read because they change automatically, push the "UPDr" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "UPDr" switch is pushed.

      HINT:

      • Push the "OFF" switch to finish panel diagnosis.
      • Push the "R/F" switch to enter the sensor check mode.
        Fig 3: Identifying Control Panel ("UPDR" Switch)
        G05831377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002