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Home >> Toyota >> 2015 >> Avalon XLE >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Climate Control Seat - Diagnostics & Symptom Tests - (Except Hybrid) >> Climate Control Seat System >> Symptom Tests >> Climate Control Seat System does not Operate [10/2014 - ] >> Procedure

Climate Control Seat System does not Operate [10/2014 - ]: Procedure

  1. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control seat operation (Refer to ON-VEHICLE INSPECTION [10/2014 - ] ).

      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  11

    Result: 

    C 

    See step  20

    Result: 

    A 

    See step  2

  2. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control seat operation again (Refer to ON-VEHICLE INSPECTION [10/2014 - ] ).

      Result

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

    Result: 

    B 

    REPLACE SEAT CLIMATE CONTROL BLOWER LH 

    (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] )

    Result: 

    C 

    See step  6

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL BLOWER LH - SEATBACK CLIMATE CONTROL BLOWER LH) 
    1. Disconnect the S16 seatback climate control blower LH connector.
    2. Disconnect the S11 seat climate control blower LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S16-1 - S11-6 Always Below 1 Ω
      S16-1 - Body ground Always 10 kΩ or higher
      S16-2 - S11-5 Always Below 1 Ω
      S16-2 - Body ground Always 10 kΩ or higher
      S16-3 - S11-1 Always Below 1 Ω
      S16-3 - 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. Replace the seatback climate control blower LH (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] ).

    Result: 

    NEXT 

    See step  5

  5. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control seat operation (Refer to ON-VEHICLE INSPECTION [10/2014 - ] ).

      OK

      The climate control seat operates normally.

    Result: 

    OK 

    END (SEATBACK CLIMATE CONTROL BLOWER LH WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE SEAT CLIMATE CONTROL BLOWER LH 

    (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] )

  6. CHECK HARNESS AND CONNECTOR (BATTERY - SEAT CLIMATE CONTROL BLOWER LH - BODY GROUND) 
    1. Disconnect the S11 seat climate control blower LH connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      S11-2 - Body ground Always 11 to 14 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      S11-3 - 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 CLIMATE CONTROL BLOWER LH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the D63 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
      S11-4 - D63-11 (SVDB) Always Below 1 Ω
      S11-4 - 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 D63 air conditioning amplifier assembly connector.
    2. Reconnect the S11 seat climate control blower LH connector.
      GTY555243Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the input signal waveform.
      1. Connect an oscilloscope to terminal 5 and body ground with the seat climate control blower LH connector still connected.
      2. Check the signal waveform according to the condition(s) in the table below.
        Terminal No. S11-4 - Body ground
        Tool Setting 2 V/DIV., 500 μsec./DIV.
        Vehicle Condition Engine switch on (IG), refreshing seat switch (for LH) on
        (blower position)
        TEXT IN ILLUSTRATION

        *a Component with harness connected
        (Seat Climate Control Blower LH)

        OK

        Waveform is similar to that shown in the illustration.

    Result: 

    OK 

    REPLACE SEAT CLIMATE CONTROL BLOWER LH 

    (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] )

    Result: 

    NG 

    See step  9

  9. INSPECT REFRESHING SEAT SWITCH 
    1. Remove the refreshing seat switch (Refer to REMOVAL [10/2014 - ] ).
      GTY609426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 6 Refreshing seat switch (for LH) on (Vol: max)
      (blower position)      		 80 to 120 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Refreshing Seat Switch)

    Result: 

    NG 

    REPLACE REFRESHING SEAT SWITCH 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (REFRESHING SEAT SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the D63 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
      D39-3 (RVL) - D63-18 (SVDS) Always Below 1 Ω
      D39-3 (RVL) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  11. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control seat operation again (Refer to ON-VEHICLE INSPECTION [10/2014 - ] ).

      Result

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

    Result: 

    B 

    REPLACE SEAT CLIMATE CONTROL BLOWER RH 

    (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] )

    Result: 

    C 

    See step  15

    Result: 

    A 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL BLOWER RH - SEATBACK CLIMATE CONTROL BLOWER RH) 
    1. Disconnect the R17 seatback climate control blower RH connector.
    2. Disconnect the R13 seat climate control blower RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R17-1 - R13-6 Always Below 1 Ω
      R17-1 - Body ground Always 10 kΩ or higher
      R17-2 - R13-5 Always Below 1 Ω
      R17-2 - Body ground Always 10 kΩ or higher
      R17-3 - R13-1 Always Below 1 Ω
      R17-3 - 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. Replace the seatback climate control blower RH (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] ).

    Result: 

    NEXT 

    See step  14

  14. CHECK CLIMATE CONTROL SEAT OPERATION 
    1. Check the climate control operation again (Refer to ON-VEHICLE INSPECTION [10/2014 - ] ).

      OK

      The climate control seat operates normally.

    Result: 

    OK 

    END (SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE SEAT CLIMATE CONTROL BLOWER RH 

    (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] )

  15. CHECK HARNESS AND CONNECTOR (BATTERY - SEAT CLIMATE CONTROL BLOWER RH - BODY GROUND) 
    1. Disconnect the R13 seat climate control blower RH connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      R13-2 - Body ground Always 11 to 14 V

      Standard Resistance

      Tester Connection Condition Specified Condition
      R13-3 - 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 CLIMATE CONTROL BLOWER RH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the D63 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
      R13-4 - D63-10 (SVPB) Always Below 1 Ω
      R13-4 - 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 D63 air conditioning amplifier assembly connector.
    2. Reconnect the R13 seat climate control blower RH connector.
      GTY561381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the input signal waveform.
      1. Connect an oscilloscope to terminal 5 and body ground with the seat climate control blower RH connector still connected.
      2. Check the signal waveform according to the condition(s) in the table below.
        Terminal No. R13-4 - Body ground
        Tool Setting 2 V/DIV., 500 μsec./DIV.
        Vehicle Condition Engine switch on (IG), refreshing seat switch (for RH) on
        (blower position)
        TEXT IN ILLUSTRATION

        *a Component with harness connected
        (Seat Climate Control Blower RH)

        OK

        Waveform is similar to that shown in the illustration.

    Result: 

    OK 

    REPLACE SEAT CLIMATE CONTROL BLOWER RH 

    (Refer to DISASSEMBLY [10/2014 - 06/2017] or DISASSEMBLY [06/2017 - ] )

    Result: 

    NG 

    See step  18

  18. INSPECT REFRESHING SEAT SWITCH 
    1. Remove the refreshing seat switch (Refer to REMOVAL [10/2014 - ] ).
      GTY609426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 - 6 Refreshing seat switch (for RH) on (Vol: max)
      (blower position)      		 80 to 120 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Refreshing Seat Switch)

    Result: 

    NG 

    REPLACE REFRESHING SEAT SWITCH 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    OK 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (REFRESHING SEAT SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the D63 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
      D39-1 (RVR) - D63-19 (SVPS) Always Below 1 Ω
      D39-1 (RVR) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  20. INSPECT REFRESHING SEAT SWITCH 
    1. Remove the refreshing seat switch (Refer to REMOVAL [10/2014 - ] ).
      GTY609426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 - 6 Always 4 to 6 kΩ
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Refreshing Seat Switch)

    Result: 

    NG 

    REPLACE REFRESHING SEAT SWITCH 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    OK 

    See step  21

  21. CHECK HARNESS AND CONNECTOR (BATTERY - REFRESHING SEAT SWITCH) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      D39-2 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  22

  22. CHECK HARNESS AND CONNECTOR (REFRESHING SEAT SWITCH - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the D39 refreshing seat switch connector.
    2. Disconnect the D63 air conditioning amplifier assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D39-6 (SW+) - D63-9 (S5-2) Always Below 1 Ω
      D39-6 (SW+) - Body ground Always 10 kΩ or higher
      D39-4 (SW-) - D63-7 (SG-5) Always Below 1 Ω
      D39-4 (SW-) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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