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CLIMATE CONTROL SEAT SYSTEM Climate Control Seat System does not Operate

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DTC Code DTC Name
  Climate Control Seat System does not Operate
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DESCRIPTION

The A/C amplifier assembly receives seat heater switch position signals when the engine switch is on (IG), and then transmits airflow amount signals to each seat climate blower.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    SYSTEM CHECK


    1. Check the climate control seat operation.

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

  2. Click here

    SYSTEM CHECK


    1. Check the climate control operation again.

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

  3. Click here

    CHECK HARNESS AND CONNECTOR


    1. A019M1EE18

      Disconnect the a16 connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      a16-2 (IG) - a16-1 (GND)

      Engine switch on (IG)

      Blower switch ON (Vol: 1 to 3)

      		 6.7 to 9.3 V
      Table 1. Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Back Climate Control Blower LH)

  4. Click here

    CHECK HARNESS AND CONNECTOR


    1. A019LNBE01

      Disconnect the a15 connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      a16-2 (IG) - a15-2 (CTB) Always Below 1 Ω
      a16-2 (IG) - Body ground Always 10 kΩ or higher
      a16-1 (GND) - Body ground Always Below 1 Ω
      Table 2. Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly LH)
      *2

      Front view of wire harness connector

      (to Seat Back Climate Control Blower LH)

  5. Click here

    CHECK HARNESS AND CONNECTOR


    1. A019JOBE09

      Disconnect the a15 connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage and Resistance
      Tester Connection Condition Specified Condition
      a15-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      a15-4 (GND) - Body ground Always Below 1 Ω
      Table 3. Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly LH)

  6. Click here

    CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. A019NB6E01

      Reconnect the a15 connector.

    2. Check the input signal waveform.


      1. Connect the oscilloscope to terminal 3 and body ground with the seat cushion climate control blower assembly LH connector still connected.

      2. Check the signal waveform according to the condition(s) in the table below.

        Terminal No. a15-3 (SIGN) - Body ground
        Tool Setting 2 V/DIV., 500 μsec./DIV.
        Vehicle Condition Engine switch on (IG), seat hater switch ON
        Table 4. Text in Illustration
        *1

        Component with harness connected

        (Seat Cushion Climate Control Blower Assembly LH)

  7. Click here

    CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A019JVWE01

        Disconnect the a15 and F51 connectors.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        a15-3 (SIGN) - F51-9 (SVDB) Always Below 1 Ω
        a15-3 (SIGN) - Body ground Always 10 kΩ or higher
        Table 5. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Cushion Climate Control Blower Assembly LH)
        *2

        Front view of wire harness connector

        (to A/C amplifier Assembly)

    2. for RHD


      1. A019JVWE04

        Disconnect the a15 and F51 connectors.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        a15-3 (SIGN) - F51-10 (SVPB) Always Below 1 Ω
        a15-3 (SIGN) - Body ground Always 10 kΩ or higher
        Table 6. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Cushion Climate Control Blower Assembly LH)
        *2

        Front view of wire harness connector

        (to A/C amplifier Assembly)

  8. Click here

    INSPECT SEAT HEATER SWITCH


    1. A019P9GE18

      Remove the seat heater switch (Click here).

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F34-8 (SVS5) - F34-10 (SVSG) Always 1.54 to 2.86 kΩ
      F34-7 (BLLH) - F34-10 (SVSG) Blower switch OFF 1.54 to 2.86 kΩ
      F34-7 (BLLH) - F34-10 (SVSG) Blower switch ON (Vol: 3) Below 1 to 100 Ω
      Table 7. Text in Illustration
      *1

      Component without harness connected

      (Seat Heater Switch)

  9. Click here

    CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A019NENE09

        Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        F34-7 (BLLH) - F51-15 (SVDS) Always Below 1 Ω
        F34-8 (SVS5) - F51-8 (S5-2) Always Below 1 Ω
        F34-10 (SVSG) - F51-6 (SG-5) Always Below 1 Ω
        F34-7 (BLLH) - Body ground Always 10 kΩ or higher
        F34-8 (SVS5) - Body ground Always 10 kΩ or higher
        F34-10 (SVSG) - Body ground Always 10 kΩ or higher
        Table 8. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Heater Switch)
        *2

        Front view of wire harness connector

        (to A/C Amplifier Assembly)

    2. for RHD


      1. A019NENE04

        Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        F34-7 (BLLH) - F51-16 (SVPS) Always Below 1 Ω
        F34-8 (SVS5) - F51-8 (S5-2) Always Below 1 Ω
        F34-10 (SVSG) - F51-6 (SG-5) Always Below 1 Ω
        F34-7 (BLLH) - Body ground Always 10 kΩ or higher
        F34-8 (SVS5) - Body ground Always 10 kΩ or higher
        F34-10 (SVSG) - Body ground Always 10 kΩ or higher
        Table 9. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Heater Switch)
        *2

        Front view of wire harness connector

        (to A/C Amplifier Assembly)

  10. Click here

    SYSTEM CHECK


    1. Check the climate control operation again.

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

  11. Click here

    CHECK HARNESS AND CONNECTOR


    1. Disconnect the Z20 connector.

    2. A019M1EE14

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Z20-2 (IG) - Z20-1 (GND)

      Engine switch on (IG)

      Blower switch ON (Vol: 1 to 3)

      		 6.7 to 9.3 V
      Table 10. Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Back Climate Control Blower RH)

  12. Click here

    CHECK HARNESS AND CONNECTOR


    1. A019LNBE02

      Disconnect the Z19 connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Z20-2 (IG) - Z19-2 (CTB) Always Below 1 Ω
      Z20-2 (IG) - Body ground Always 10 kΩ or higher
      Z20-1 (GND) - Body ground Always Below 1 Ω
      Table 11. Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly RH)
      *2

      Front view of wire harness connector

      (to Seat Back Climate Control Blower RH)

  13. Click here

    CHECK HARNESS AND CONNECTOR


    1. A019JOBE05

      Disconnect the Z19 connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage and Resistance
      Tester Connection Condition Specified Condition
      Z19-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Z19-4 (GND) - Body ground Always Below 1 Ω
      Table 12. Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly RH)

  14. Click here

    CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. A019NB6E05

      Reconnect the Z19 connector.

    2. Check the input signal waveform.


      1. Connect the oscilloscope to terminal 3 and body ground with the climate control blower assembly RH connector still connected.

      2. Check the signal waveform according to the condition(s) in the table below.

        Terminal No. Z19-3 (SIGN) - Body ground
        Tool Setting 2 V/DIV., 500 μsec./DIV.
        Vehicle Condition Engine switch on (IG), seat heater switch ON
        Table 13. Text in Illustration
        *1

        Component with harness connected

        (Seat Cushion Climate Control Blower Assembly RH)

  15. Click here

    CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A019JVWE05

        Disconnect the Z19 and F51 connectors.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        Z19-3 (SIGN) - F51-10 (SVPB) Always Below 1 Ω
        Z19-3 (SIGN) - Body ground Always 10 kΩ or higher
        Table 14. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Cushion Climate Control Blower Assembly RH)
        *2

        Front view or wire harness connector

        (to A/C Amplifier Assembly)

    2. for RHD


      1. A019JVWE06

        Disconnect the Z19 and F51 connectors.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        Z19-3 (SIGN) - F51-9 (SVDB) Always Below 1 Ω
        Z19-3 (SIGN) - Body ground Always 10 kΩ or higher
        Table 15. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Cushion Climate Control Blower Assembly RH)
        *2

        Front view or wire harness connector

        (to A/C Amplifier Assembly)

  16. Click here

    INSPECT SEAT HEATER SWITCH


    1. A019P9GE20

      Remove the seat heater switch (Click here).

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F34-8 (SVS5) - F34-10 (SVSG) Always 1.54 to 2.86 kΩ
      F34-9 (BLRH) - F34-10 (SVSG) Blower switch OFF 1.54 to 2.86 kΩ
      F34-9 (BLRH) - F34-10 (SVSG) Blower switch ON (Vol: 3) Below 1 to 100 Ω
      Table 16. Text in Illustration
      *1

      Component without harness connected

      (Seat Heater Switch)

  17. Click here

    CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A019NENE05

        Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        F34-9 (BLRH) - F51-16 (SVPS) Always Below 1 Ω
        F34-8 (SVS5) - F51-8 (S5-2) Always Below 1 Ω
        F34-10 (SVSG) - F51-6 (SG-5) Always Below 1 Ω
        F34-12 (E) - Body ground Always Below 1 Ω
        F34-9 (BLRH) - Body ground Always 10 kΩ or higher
        F34-8 (SVS5) - Body ground Always 10 kΩ or higher
        F34-10 (SVSG) - Body ground Always 10 kΩ or higher
        Table 17. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Heater Switch)
        *2

        Front view of wire harness connector

        (to A/C Amplifier Assembly)

    2. for RHD


      1. A019NENE06

        Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        F34-9 (BLRH) - F51-15 (SVDS) Always Below 1 Ω
        F34-8 (SVS5) - F51-8 (S5-2) Always Below 1 Ω
        F34-10 (SVSG) - F51-6 (SG-5) Always Below 1 Ω
        F34-12 (E) - Body ground Always Below 1 Ω
        F34-9 (BLRH) - Body ground Always 10 kΩ or higher
        F34-8 (SVS5) - Body ground Always 10 kΩ or higher
        F34-10 (SVSG) - Body ground Always 10 kΩ or higher
        Table 18. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Heater Switch)
        *2

        Front view of wire harness connector

        (to A/C Amplifier Assembly)

  18. Click here

    INSPECT SEAT HEATER SWITCH


    1. A019P9GE19

      Remove the seat heater switch (Click here).

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F34-8 (SVS5) - F34-10 (SVSG) Always 1.54 to 2.86 kΩ
      F34-7 (BLLH) - F34-10 (SVSG) Blower switch OFF 1.54 to 2.86 kΩ
      F34-7 (BLLH) - F34-10 (SVSG) Blower switch ON (Vol: 3) Below 1 to 100 Ω
      F34-9 (BLRH) - F34-10 (SVSG) Blower switch OFF 1.54 to 2.86 kΩ
      F34-9 (BLRH) - F34-10 (SVSG) Blower switch ON (Vol: 3) Below 1 to 100 Ω
      Table 19. Text in Illustration
      *1

      Component without harness connected

      (Seat Heater Switch)

  19. Click here

    CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A019NENE07

        Disconnect the F51 connector.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        F34-7 (BLLH) - F51-15 (SVDS) Always Below 1 Ω
        F34-8 (SVS5) - F51-8 (S5-2) Always Below 1 Ω
        F34-9 (BLRH) - F51-16 (SVPS) Always Below 1 Ω
        F34-10 (SVSG) - F51-6 (SG-5) Always Below 1 Ω
        F34-7 (BLLH) - Body ground Always 10 kΩ or higher
        F34-8 (SVS5) - Body ground Always 10 kΩ or higher
        F34-9 (BLRH) - Body ground Always 10 kΩ or higher
        F34-10 (SVSG) - Body ground Always 10 kΩ or higher
        Table 20. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Heater Switch)
        *2

        Front view of wire harness connector

        (to A/C Amplifier Assembly)

    2. for RHD


      1. A019NENE08

        Disconnect the F51 connector.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        F34-7 (BLLH) - F51-16 (SVPS) Always Below 1 Ω
        F34-8 (SVS5) - F51-8 (S5-2) Always Below 1 Ω
        F34-9 (BLRH) - F51-15 (SVDS) Always Below 1 Ω
        F34-10 (SVSG) - F51-6 (SG-5) Always Below 1 Ω
        F34-7 (BLLH) - Body ground Always 10 kΩ or higher
        F34-8 (SVS5) - Body ground Always 10 kΩ or higher
        F34-9 (BLRH) - Body ground Always 10 kΩ or higher
        F34-10 (SVSG) - Body ground Always 10 kΩ or higher
        Table 21. Text in Illustration
        *1

        Front view of wire harness connector

        (to Seat Heater Switch)
        *2

        Front view of wire harness connector

        (to A/C Amplifier Assembly)

  20. Click here

    REPLACE SEAT BACK CLIMATE CONTROL BLOWER LHClick here

  21. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  22. Click here

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LHClick here

  23. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  24. Click here

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LHClick here

  25. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  26. Click here

    REPLACE SEAT HEATER SWITCHClick here

  27. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  28. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

  29. Click here

    REPLACE SEAT BACK CLIMATE CONTROL BLOWER RHClick here

  30. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  31. Click here

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RHClick here

  32. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  33. Click here

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RHClick here

  34. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  35. Click here

    REPLACE SEAT HEATER SWITCHClick here

  36. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  37. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

  38. Click here

    REPLACE SEAT HEATER SWITCHClick here

  39. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  40. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here