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Climate Control Seat System does not Operate [09/2015 - ]: Procedure

  1. CHECK DTC OUTPUT 
    1. Clear DTCs.

      Refer to DTC CHECK / CLEAR [09/2015 - ]

      Body Electrical > Air Conditioner > Clear DTCs 

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [09/2015 - ]

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      DTC B14B5 is not output A
      DTC B14B5 output B

    Result: 

    B 

    GO TO SEAT HEATER SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2015 - 12/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2017 - ] 

    Result: 

    A 

    See step  2

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      Result

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

    Result: 

    B 

    See step  12

    Result: 

    C 

    See step  21

    Result: 

    A 

    See step  3

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      Result

      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 [09/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - ] 

    Result: 

    C 

    See step  7

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - SEATBACK CLIMATE CONTROL BLOWER LH) 
    1. Disconnect the e1 seatback climate control blower LH connector.
    2. Disconnect the c10 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
      e1-1 (VDD2) - c10-5 (VDD2) Always Below 1 Ω
      e1-1 (VDD2) or c10-5 (VDD2) - Body ground Always 10 kΩ or higher
      e1-3 (SC2) - c10-6 (SC2) Always Below 1 Ω
      e1-3 (SC2) or c10-6 (SC2) - Body ground Always 10 kΩ or higher
      e1-4 (GND2) - c10-4 (GND2) Always Below 1 Ω
      e1-4 (GND2) or c10-4 (GND2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. 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 [09/2015 - 12/2017] , or refer to DISASSEMBLY [12/2017 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      OK

      The climate control seat operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (SEATBACK CLIMATE CONTROL BLOWER LH WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH. Refer to  DISASSEMBLY [09/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - ] 

  7. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - BODY GROUND) 
    1. Disconnect the c10 seat cushion climate control blower assembly LH connector.
      GTY652295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Seat Cushion Climate Control Blower Assembly LH)
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      c10-1 (VDD1) - Body ground Engine switch on (IG) 11 to 14 V
      c10-1 (VDD1) - Body ground Engine switch off Below 1 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      c10-8 (GND1) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the J43 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
      c10-7 (SC1) - J43-24 (LOUT) Always Below 1 Ω
      c10-7 (SC1) or J43-24 (LOUT) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    1. Reconnect the J43 air conditioning amplifier assembly connector.
    2. Reconnect the c10 seat cushion climate control blower assembly LH connector.
      Fig 1: Air Conditioning Amplifier Assembly Terminals With Waveform
      GTY626390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Replacement Components with harness connected
      (Air Conditioning Amplifier Assembly)
    3. Check the input signal waveform.
      MEASUREMENT CONDITION

      Item Content
      Tester Connection J43-24 (LOUT) - Body ground
      Tool Setting 1 V/DIV., 1 ms/DIV.
      Vehicle Condition
      • Engine switch on (IG)
      • Refreshing seat switch (for front LH side) on

        (blower position)

      OK

      Waveform is similar to that shown in the illustration.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH. Refer to  DISASSEMBLY [09/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - ] 

    Result: 

    NG 

    See step  10

  10. REPLACE REFRESHING SEAT SWITCH (FOR FRONT SIDE) 
    1. Temporarily replace the refreshing seat switch (for front side) with a new or known good one.

      Refer to REMOVAL [09/2015 - 08/2019] , or refer to REMOVAL [08/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  11

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      OK

      The climate control seat operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (REFRESHING SEAT SWITCH (FOR FRONT SIDE) WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      Result

      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 [09/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - ] 

    Result: 

    C 

    See step  16

    Result: 

    A 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - SEATBACK CLIMATE CONTROL BLOWER RH) 
    1. Disconnect the d1 seatback climate control blower RH connector.
    2. Disconnect the b7 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
      b7-5 (VDD2) - d1-1 (VDD2) Always Below 1 Ω
      b7-5 (VDD2) or d1-1 (VDD2) - Body ground Always 10 kΩ or higher
      b7-6 (SC2) - d1-3 (SC2) Always Below 1 Ω
      b7-6 (SC2) or d1-3 (SC2) - Body ground Always 10 kΩ or higher
      d1-4 (GND2) - b7-4 (GND2) Always Below 1 Ω
      d1-4 (GND2) or b7-4 (GND2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. 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 [09/2015 - 12/2017] , or refer to DISASSEMBLY [12/2017 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  15

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      OK

      The climate control seat operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH. Refer to  DISASSEMBLY [09/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - ] 

  16. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - BODY GROUND) 
    1. Disconnect the b7 seat cushion climate control blower assembly RH connector.
      GTY681273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Seat Cushion Climate Control Blower Assembly LH)
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      b7-1 (VDD1) - Body ground Engine switch on (IG) 11 to 14 V
      b7-1 (VDD1) - Body ground Engine switch off Below 1 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      b7-8 (GND1) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the J43 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
      b7-7 (SC1) - J43-23 (ROUT) Always Below 1 Ω
      b7-7 (SC1) or J43-23 (ROUT) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  18

  18. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    1. Reconnect the J43 air conditioning amplifier assembly connector.
    2. Reconnect the b7 seat cushion climate control blower assembly RH connector.
      Fig 2: Air Conditioning Amplifier Assembly Terminals With Waveform
      GTY675554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Replacement Components with harness connected
      (Air Conditioning Amplifier Assembly)
    3. Check the input signal waveform.
      MEASUREMENT CONDITION

      Item Content
      Tester Connection J43-23 (ROUT) - Body ground
      Tool Setting 1 V/DIV., 1 ms/DIV.
      Vehicle Condition
      • Engine switch on (IG)
      • Refreshing seat switch (for front RH side) on

        (blower position)

      OK

      Waveform is similar to that shown in the illustration.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH. Refer to  DISASSEMBLY [09/2015 - 12/2017]  , or refer to  DISASSEMBLY [12/2017 - ] 

    Result: 

    NG 

    See step  19

  19. REPLACE REFRESHING SEAT SWITCH (FOR FRONT SIDE) 
    1. Temporarily replace the refreshing seat switch (for front side) with a new or known good one.

      Refer to REMOVAL [09/2015 - 08/2019] , or refer to REMOVAL [08/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  20

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      OK

      The climate control seat operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (REFRESHING SEAT SWITCH (FOR FRONT SIDE) WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

  21. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - REFRESHING SEAT SWITCH (FOR FRONT SIDE) - BODY GROUND) 
    1. Disconnect the J82 refreshing seat switch (for front side) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      J82-2 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      J82-2 (IG) - Body ground Engine switch off Below 1 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      J82-7 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  22

  22. REPLACE REFRESHING SEAT SWITCH (FOR FRONT SIDE) 
    1. Temporarily replace the refreshing seat switch (for front side) with a new or known good one.

      Refer to REMOVAL [09/2015 - 08/2019] , or refer to REMOVAL [08/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  23

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

      Refer to ON-VEHICLE INSPECTION [09/2015 - ] 

      OK

      The climate control seat operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (REFRESHING SEAT SWITCH (FOR FRONT SIDE) WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

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