CLIMATE CONTROL SEAT SYSTEM > ON-VEHICLE INSPECTION

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1. CHECK FRONT SEATBACK CLIMATE CONTROL BLOWER LH

  1. Turn the engine switch on (IG).

  1. Set the seat heater switch blower side volume to level 3 (maximum).

  1. Check that the fan motor turns smoothly.



2. CHECK FRONT SEAT CUSHION CLIMATE CONTROL BLOWER LH

  1. Turn the engine switch on (IG).

  1. Set the seat heater switch blower side volume to level 3 (maximum).

  1. Check that the fan motor turns smoothly.



3. CHECK FRONT SEATBACK CLIMATE CONTROL BLOWER RH

  1. Turn the engine switch on (IG).

  1. Set the seat heater switch blower side volume to level 3 (maximum).

  1. Check that the fan motor turns smoothly.



4. CHECK FRONT SEAT CUSHION CLIMATE CONTROL BLOWER RH

  1. Turn the engine switch on (IG).

  1. Set the seat heater switch blower side volume to level 3 (maximum).

  1. Check that the fan motor turns smoothly.



5. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY



E106729E02

  1. Disconnect the L52 ECU connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND (L52-20) - Body ground
    		W-B Body ground
    		Ground
    		Always
    		Below 1 Ω

    If the result is not as specified, there may be a malfunction on the wire harness side.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    B (L52-1) - GND (L52-20)
    		L - W-B
    		Battery
    		Always
    		10 to 14 V
    IG (L52-21) - GND (L52-20)
    		W - W-B
    		IG power supply
    		Engine switch off
    		Below 1 V
    IG (L52-21) - GND (L52-20)
    		W - W-B
    		IG power supply
    		Engine switch on (IG)
    		10 to 14 V

    If the result is not as specified, there may be a malfunction on the wire harness side.

  1. Reconnect the L52 ECU connector.



  1. Measure the voltage of the connector.

    Standard voltage:

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    LOUT (L51-16) - GND (L52-20)
    		SB - W-B
    		Front LH side climate control seat blower operation signal
    		Engine switch on (IG), front LH side seat heater switch blower side ON (blower volume 3)
    		Pulse generation (see waveform 1)
    ROUT (L51-8) - GND (L52-20)
    		O - W-B
    		Front RH side climate control seat blower operation signal
    		Engine switch on (IG), front RH side seat heater switch blower side ON (blower volume 3)
    		Pulse generation (see waveform 1)

    If the result is not as specified, the ECU may have a malfunction.



      E103399

    1. Waveform 1
      Item
      		Content
      Symbols (Terminal No.)
      		LOUT (L51-16) or ROUT (L51-8) - GND (LS2-20)
      Tool Setting
      		2 V / DIV., 500 μsec. / DIV.
      Condition
      		Engine switch on (IG)