FixVault
Home › Lexus › 2004 › LS 430 › Repair and Diagnosis › Body & Frame › Seats › Climate Control Seat System - Diagnosis › Climate Control System Does Not Operate On Rear Side › Inspection

Climate Control System Does Not Operate On Rear Side: Inspection

  1. Driver's side: 

    INSPECT TRACTION CONTROL SWITCH (CLIMATE CONTROL SWITCH FRONT) 

    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 1: Terminals Resistance Reference Chart
      G01443752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the dial is being turned, the resistance changes gradually. If the result is not as specified, replace the seat heater switch.

    2. Check that the seat heater switch indicator illuminates.

      OK: Go to next step. 

      Fig 2: Measurement Condition Chart
      G01443753Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Inspecting Traction Control Switch (Climate Control Switch Front) (Driver Side)
      G01443754Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the switch or bulb.

  2. Passenger's side: 

    INSPECT TRACTION CONTROL SWITCH (CLIMATE CONTROL SWITCH FRONT) 

    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 4: Terminals Resistance Reference Chart
      G01443755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the dial is being turned, the resistance changes gradually. If the result is not as specified, replace the seat heater switch.

    2. Check that the seat heater switch indicator illuminates.

      OK: Go to next step. 

      Fig 5: Measurement Condition Chart
      G01443756Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 6: Inspecting Traction Control Switch (Climate Control Switch Front)
      G01443757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the switch or bulb.

  3. INSPECT SEAT CLIMATE CONTROLLER LH (FRONT SEAT CUSHION) 
    1. Measure the resistance between the terminals.

      Standard: 

      Fig 7: Terminals Resistance Reference Chart
      G01443758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

      Standard: 

      Fig 8: Thermistor Terminals Resistance Reference Chart
      G01443759Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 9: Inspecting Seat Climate Controller LH (Front Seat Cushion)
      G01443760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  4. INSPECT SEAT CLIMATE CONTROLLER RH (FRONT SEAT CUSHION) 
    1. Measure the resistance between the terminals.

      Standard: 

      Fig 10: Terminals Resistance Reference Chart
      G01443761Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

      Standard: 

      Fig 11: Thermistor Terminals Resistance Reference Chart
      G01443762Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 12: Inspecting Seat Climate Controller RH (Front Seat Cushion)
      G01443763Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  5. INSPECT SEAT CLIMATE CONTROLLER LH (FRONT SEATBACK) 
    1. Measure the resistance between the terminals.

      Standard: 

      Fig 13: Terminals Resistance Reference Chart
      G01443764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 14: Inspecting Seat Climate Controller LH (Front Seatback)
      G01443765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

      Standard: 

      Fig 15: Thermistor Terminals Resistance Reference Chart
      G01443766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  6. INSPECT SEAT CLIMATE CONTROLLER RH (FRONT SEATBACK) 
    1. Measure the resistance between the terminals.

      Standard: 

      Fig 16: Terminals Resistance Reference Chart
      G01443767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

      Standard: 

      Fig 17: Thermistor Terminals Resistance Reference Chart
      G01443768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 18: Inspecting Seat Climate Controller RH (Front Seatback)
      G01443769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  7. INSPECT CLIMATE CONTROL SEAT SWITCH LH (REAR) 
    1. Measure the resistance between the terminals when to switch is operated.

      Standard: 

      Fig 19: Terminals Resistance Reference Chart
      G01443770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the dial is being turned, the resistance changes gradually. If the result is not as specified, replace the seat heater switch.

    2. Check that the seat heater switch indicator illuminates.

      OK: Go to next step. 

      Fig 20: Measurement Condition Chart
      G01443771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 21: Inspecting Climate Control Seat Switch LH (Rear)
      G01443772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the switch or bulb.

  8. INSPECT CLIMATE CONTROL SEAT SWITCH RH (REAR) 
    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 22: Terminals Resistance Reference Chart
      G01443773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the dial is being turned, the resistance changes gradually. If the result is not as specified, replace the seat heater switch.

    2. Check that the seat heater switch indicator illuminates.

      OK: Go to next step. 

      Fig 23: Measurement Condition Chart
      G01443774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 24: Inspecting Climate Control Seat Switch RH (Rear)
      G01443775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the switch or bulb.

  9. INSPECT SEAT CLIMATE CONTROL BLOWER LH (REAR SEAT CUSHION) 
    1. Connect the battery's positive (+) lead to terminals 3 (BCS) and 4 (BFC-), and the negative (-) lead to terminal 2 (BFC+). Check that the blower fan motor operates smoothly.

    If the result is not as specified, replace the blower fan motor.

    Fig 25: Inspecting Seat Climate Control Blower LH (Rear Seat Cushion)
    G01443776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. INSPECT SEAT CLIMATE CONTROL BLOWER RH (REAR SEAT CUSHION) 
    1. Connect the battery's positive (+) lead to terminals 3 (BCS) and 4 (BFC-), and the negative (-) lead to terminal 4 (BFC-). Check that the blower fan motor operates smoothly.

    If the result is not as specified, replace the blower fan motor.

    Fig 26: Inspecting Seat Climate Control Blower RH (Rear Seat Cushion)
    G01443777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. INSPECT SEAT CLIMATE CONTROLLER LH (REAR SEAT CUSHION) 
    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 27: Terminals Resistance Reference Chart
      G01443778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

      Standard: 

      Fig 28: Thermistor Terminals Resistance Reference Chart
      G01443779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 29: Inspecting Seat Climate Controller LH (Rear Seat Cushion)
      G01443780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  12. INSPECT SEAT CLIMATE CONTROLLER RH (REAR SEAT CUSHION) 
    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 30: Terminals Resistance Reference Chart
      G01443781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals

      Standard: 

      Fig 31: Thermistor Terminals Resistance Reference Chart
      G01443782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 32: Inspecting Seat Climate Controller RH (Rear Seat Cushion)
      G01443783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  13. INSPECT SEAT CLIMATE CONTROL BLOWER LH (REAR SEATBACK) 
    1. Connect the battery's positive (+) lead to terminals 3 (BBS) and 4 (BFB-), and the negative (-) lead to terminal 2 (BFB+). Check that the blower fan motor operator smoothly.

    If the result is not as specified, replace the blower fan motor.

    Fig 33: Inspecting Seat Climate Control Blower LH (Rear Seatback)
    G01443784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. INSPECT SEAT CLIMATE CONTROL BLOWER RH (REAR SEATBACK) 
    1. Connect the battery's positive (+) lead to terminals 3 (BBS) and 4 (BFB-), and the negative (-) lead to terminal 2 (BFB+). Check that the blower fan motor operates smoothly.

    If the result is not as specified, replace the blower fan motor.

    Fig 34: Inspecting Seat Climate Control Blower RH (Rear Seatback)
    G01443785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. INSPECT SEAT CLIMATE CONTROLLER LH (REAR SEATBACK) 
    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 35: Terminals Resistance Reference Chart
      G01443786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 36: Inspecting Seat Climate Controller LH (Rear Seatback)
      G01443787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals

      Standard: 

      Fig 37: Thermistor Terminals Resistance Reference Chart
      G01443788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  16. INSPECT SEAT CLIMATE CONTROLLER RH (REAR SEATBACK) 
    1. Measure the resistance between the terminals when the switch is operated.

      Standard: 

      Fig 38: Terminals Resistance Reference Chart
      G01443789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the controller.

    2. Measure the thermistor resistance between the terminals.

      Standard: 

      Fig 39: Thermistor Terminals Resistance Reference Chart
      G01443790Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 40: Inspecting Seat Climate Controller RH (Rear Seatback)
      G01443791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the temperature increases, the resistance decreases. If the result is not as specified, replace the controller.

  17. INSPECT REAR SEAT CUSHION HEATER ASSY LH 
    1. Measure the resistance between the terminals of the rear wing outer heater LH.

      Standard: 

      Fig 41: Terminals Resistance Reference Chart
      G01443792Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 42: Inspecting Rear Seat Cushion Heater Assy LH
      G01443793Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear wing outer heater assy LH.

    2. Measure the resistance between the terminals of the rear wing inner heater LH.

      Standard: 

      Fig 43: Terminals Resistance Reference Chart
      G01443794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 44: Inspecting Rear Seat Cushion Heater Assy LH
      G01443795Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear wing inner heater assy LH.

    3. Measure the resistance between the terminals of the rear cushion heater LH.

      Standard: 

      Fig 45: Terminals Resistance Reference Chart
      G01443796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 46: Inspecting Rear Cushion Heater LH
      G01443797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear cushion heater assy LH.

  18. INSPECT REAR SEATBACK HEATER ASSY LH 
    1. Measure the resistance between the terminals of the rear seatback heater LH.

      Standard: 

      Fig 47: Terminals Resistance Reference Chart
      G01443798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 48: Inspecting Rear Seatback Heater Assy LH
      G01443799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear seatback heater assy LH.

  19. INSPECT REAR SEAT CUSHION HEATER ASSY RH 
    1. Measure the resistance between the terminals of the rear wing outer heater RH.

      Standard: 

      Fig 49: Terminals Resistance Reference Chart
      G01443800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 50: Inspecting Rear Seat Cushion Heater Assy RH (Outer)
      G01443801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear wing outer heater assy RH.

    2. Measure the resistance between the terminals of the rear wing inner heater RH.

      Standard: 

      Fig 51: Terminals Resistance Reference Chart
      G01443802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 52: Inspecting Rear Seat Cushion Heater Assy RH (Inner)
      G01443803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear wing inner heater assy RH.

    3. Check the resistance between the terminals of the rear cushion heater RH.

      Standard: 

      Fig 53: Terminals Resistance Reference Chart
      G01443804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 54: Inspecting Rear Cushion Heater RH
      G01443805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear cushion heater assy RH.

  20. INSPECT REAR SEATBACK HEATER ASSY RH 
    1. Measure the resistance between the terminals of the rear seatback heater RH.

      Standard: 

      Fig 55: Terminals Resistance Reference Chart
      G01443806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 56: Inspecting Rear Seatback Heater Assy RH
      G01443807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the rear seatback heater assy RH.

About FixVault