LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2008 >> GS 350 RWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Seat >> Climate Control Seat System >> On-Vehicle Inspection

On-Vehicle Inspection

  1. CHECK FRONT SEATBACK CLIMATE CONTROL BLOWER LH 
    1. Turn the engine switch on (IG).
    2. Set the seat heater switch blower side volume to level 3 (maximum).
    3. Check that the fan motor turns smoothly.
  2. CHECK FRONT SEAT CUSHION CLIMATE CONTROL BLOWER LH 
    1. Turn the engine switch on (IG).
    2. Set the seat heater switch blower side volume to level 3 (maximum).
    3. Check that the fan motor turns smoothly.
  3. CHECK FRONT SEATBACK CLIMATE CONTROL BLOWER RH 
    1. Turn the engine switch on (IG).
    2. Set the seat heater switch blower side volume to level 3 (maximum).
    3. Check that the fan motor turns smoothly.
  4. CHECK FRONT SEAT CUSHION CLIMATE CONTROL BLOWER RH 
    1. Turn the engine switch on (IG).
    2. Set the seat heater switch blower side volume to level 3 (maximum).
    3. Check that the fan motor turns smoothly.
  5. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (A/C ECU) 
    Fig 1: Identifying Air Conditioning Amplifier Connector Terminals
    G05300492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K52 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      RESISTANCE AND VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (K52-20) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B (K52-1) - GND (K52-20) L - W-B Battery Always 10 to 14 V
      IG+ (K52-21) - GND (K52-20) W - Body ground IG power supply Engine switch off Below 1 V
      IG+ (K52-21) - GND (K52-20) W - Body ground 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.

    3. Reconnect the K52 ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      LOUT (K51-16) - GND (K52-20) SB - W-B Driver 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  1waveform 1)
      ROUT (K51-8) - GND (K52-20) O - W-B Front passenger side climate control seat blower operation signal Engine switch on (IG), front RH side side seat heater switch blower side ON (blower volume 3) Pulse generation (see  1waveform 1)

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

      1. Waveform 1
        WAVEFORM REFERENCE

        Item Content
        Terminal LOUT (K51-16) or ROUT (K51-8) - GND (K52 - 20)
        Tool Setting 2 V / DIV., 500 μsec. / DIV.
        Condition Engine switch on (IG)
        Fig 2: Identifying Waveform 1
        G05300493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals