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Climate Control Seat System Does Not Operate [02/2014 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control seat operation.

      Refer to ON-VEHICLE INSPECTION [02/2014 - ] 

      Result Proceed to
      Climate control seat does not operate (front LH seat) A
      Climate control seat does not operate (front RH seat) B
      Both climate control seats do not operate C

    Result: 

    B 

    See step  11

    Result: 

    C 

    See step  20

    Result: 

    A 

    See step  2

  2. CHECK CLIMATE CONTROL SEAT OPERATION (FRONT LH SEAT) 
    1. Check the climate control seat operation again.

      Refer to ON-VEHICLE INSPECTION [02/2014 - ] 

      Result Proceed to
      Only seatback climate control blower LH does not operate A
      Only seat cushion climate control blower assembly LH does not operate B
      Both climate control blowers do not operate C

    Result: 

    B 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH. 

    Refer to  DISASSEMBLY [02/2014 - 11/2016] 

    Refer to  DISASSEMBLY [11/2016 - ] 

    Result: 

    C 

    See step  6

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - SEATBACK CLIMATE CONTROL BLOWER LH) 
    1. Disconnect the m1 seatback climate control blower LH connector.
    2. Disconnect the e10 seat cushion climate control blower assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      m1-1 (IGB) - e10-3 (IGB) Always Below 1 Ω
      m1-1 (IGB) or e10-3 (IGB) - Body ground Always 10 kΩ or higher
      m1-2 (VS) - e10-4 (VS) Always Below 1 Ω
      m1-2 (VS) or e10-4 (VS) - Body ground Always 10 kΩ or higher
      m1-3 (GND) - e10-2 (GND2) Always Below 1 Ω
      m1-3 (GND) or e10-2 (GND2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. REPLACE SEATBACK CLIMATE CONTROL BLOWER LH 
    1. Temporarily replace the seatback climate control blower LH with a new or known good one.

      Refer to DISASSEMBLY [02/2014 - 11/2016]

      Refer to DISASSEMBLY [11/2016 - ]

    Result: 

    NEXT 

    See step  5

  5. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control seat operation.

      Refer to ON-VEHICLE INSPECTION [02/2014 - ] 

      OK

      The climate control seat operates normally.

    Result: 

    OK 

    END (SEATBACK CLIMATE CONTROL BLOWER LH WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH. 

    Refer to  DISASSEMBLY [02/2014 - 11/2016] 

    Refer to  DISASSEMBLY [11/2016 - ] 

  6. CHECK HARNESS AND CONNECTOR (IGNITION POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - BODY GROUND) 
    1. Disconnect the e10 seat cushion climate control blower assembly LH connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      e10-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      e10-6 (GND) - Body ground Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the F81 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      e10-5 (SI) - F81-10 (SVDB) Always Below 1 Ω
      e10-5 (SI) or F81-10 (SVDB) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    1. Reconnect the F81 air conditioning amplifier assembly connector.
    2. Reconnect the e10 seat cushion climate control blower assembly LH connector.
      GTY428824Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Air Conditioning Amplifier Assembly)
    3. Check the input signal waveform.
      1. Connect an oscilloscope to terminal F81-10 (SVDB) and body ground with the air conditioning amplifier assembly connector still connected.
      2. Check the signal waveform according to the condition(s) in the table below.
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F81-10 (SVDB) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition
        • Power switch on (IG)
        • Seat heater switch (LH side) on

          (blower position)

        OK

        Waveform is similar to that shown in the illustration.

    Result: 

    OK 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH. 

    Refer to  DISASSEMBLY [02/2014 - 11/2016] 

    Refer to  DISASSEMBLY [11/2016 - ] 

    Result: 

    NG 

    See step  9

  9. INSPECT SEAT HEATER SWITCH 
    1. Remove the seat heater switch.

      Refer to REMOVAL [02/2014 - ]

    2. Inspect the seat heater switch.

      Refer to INSPECTION [02/2014 - ]

    Result: 

    NG 

    REPLACE SEAT HEATER SWITCH. 

    Refer to  REMOVAL [02/2014 - ] 

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (SEAT HEATER SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the F81 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q4-7 (BLLH) - F81-18 (SVDS) Always Below 1 Ω
      Q4-7 (BLLH) or F81-18 (SVDS) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. 

    Refer to  REMOVAL [02/2014 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. CHECK CLIMATE CONTROL SEAT OPERATION (FRONT RH SEAT) 
    1. Check the climate control seat operation again.

      Refer to ON-VEHICLE INSPECTION [02/2014 - ] 

      Result Proceed to
      Only seatback climate control blower RH does not operate A
      Only seat cushion climate control blower assembly RH does not operate B
      Both climate control blowers do not operate C

    Result: 

    B 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH. 

    Refer to  DISASSEMBLY [02/2014 - 11/2016] 

    Refer to  DISASSEMBLY [11/2016 - ] 

    Result: 

    C 

    See step  15

    Result: 

    A 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - SEATBACK CLIMATE CONTROL BLOWER RH) 
    1. Disconnect the k1 seatback climate control blower RH connector.
    2. Disconnect the d10 seat cushion climate control blower assembly RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      k1-1 (IGB) - d10-3 (IGB) Always Below 1 Ω
      k1-1 (IGB) or d10-3 (IGB) - Body ground Always 10 kΩ or higher
      k1-2 (VS) - d10-4 (VS) Always Below 1 Ω
      k1-2 (VS) or d10-4 (VS) - Body ground Always 10 kΩ or higher
      k1-3 (GND) - d10-2 (GND2) Always Below 1 Ω
      k1-3 (GND) or d10-2 (GND2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. REPLACE SEATBACK CLIMATE CONTROL BLOWER RH 
    1. Temporarily replace the seatback climate control blower RH with a new or known good one.

      Refer to DISASSEMBLY [02/2014 - 11/2016]

      Refer to DISASSEMBLY [11/2016 - ]

    Result: 

    NEXT 

    See step  14

  14. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control operation again.

      Refer to ON-VEHICLE INSPECTION [02/2014 - ] 

      OK

      The climate control seat operates normally.

    Result: 

    OK 

    END (SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH. 

    Refer to  DISASSEMBLY [02/2014 - 11/2016] 

    Refer to  DISASSEMBLY [11/2016 - ] 

  15. CHECK HARNESS AND CONNECTOR (IGNITION POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - BODY GROUND) 
    1. Disconnect the d10 seat cushion climate control blower assembly RH connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      d10-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      d10-6 (GND) - Body ground Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the F81 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      d10-5 (SI) - F81-11 (SVPB) Always Below 1 Ω
      d10-5 (SI) or F81-11 (SVPB) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    1. Reconnect the F81 air conditioning amplifier assembly connector.
    2. Reconnect the d10 seat cushion climate control blower assembly RH connector.
      GTY428825Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Air Conditioning Amplifier Assembly)
    3. Check the input signal waveform.
      1. Connect an oscilloscope to terminal F81-11 (SVPB) and body ground with the air conditioning amplifier assembly connector still connected.
      2. Check the signal waveform according to the condition(s) in the table below.
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F81-11 (SVPB) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition
        • Power switch on (IG)
        • Seat heater switch (RH side) on

          (blower position)

        OK

        Waveform is similar to that shown in the illustration.

    Result: 

    OK 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH. 

    Refer to  DISASSEMBLY [02/2014 - 11/2016] 

    Refer to  DISASSEMBLY [11/2016 - ] 

    Result: 

    NG 

    See step  18

  18. INSPECT SEAT HEATER SWITCH 
    1. Remove the seat heater switch.

      Refer to REMOVAL [02/2014 - ]

    2. Inspect the seat heater switch.

      Refer to INSPECTION [02/2014 - ]

    Result: 

    NG 

    REPLACE SEAT HEATER SWITCH. 

    Refer to  REMOVAL [02/2014 - ] 

    Result: 

    OK 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (SEAT HEATER SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the F81 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q4-9 (BLRH) - F81-19 (SVPS) Always Below 1 Ω
      Q4-9 (BLRH) or F81-19 (SVPS) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. 

    Refer to  REMOVAL [02/2014 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  20. INSPECT SEAT HEATER SWITCH 
    1. Remove the seat heater switch.

      Refer to REMOVAL [02/2014 - ]

    2. Inspect the seat heater switch.

      Refer to INSPECTION [02/2014 - ]

    Result: 

    NG 

    REPLACE SEAT HEATER SWITCH. 

    Refer to  REMOVAL [02/2014 - ] 

    Result: 

    OK 

    See step  21

  21. CHECK HARNESS AND CONNECTOR (SEAT HEATER SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the F81 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q4-8 (SVS5) - F81-9 (S5-2) Always Below 1 Ω
      Q4-8 (SVS5) or F81-9 (S5-2) - Body ground Always 10 kΩ or higher
      Q4-10 (SVSG) - F81-23 (SG-6) Always Below 1 Ω
      Q4-10 (SVSG) or F81-23 (SG-6) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. 

    Refer to  REMOVAL [02/2014 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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