CLIMATE CONTROL SEAT SYSTEM Climate Control Seat System does not Operate

DESCRIPTION

The air conditioning 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.

WIRING DIAGRAM

A0027UJE02
A002BRJE12

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK CLIMATE CONTROL SEAT OPERATION


    1. Check the climate control seat operation.

      Click here

      Result
      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

    B

    CHECK CLIMATE CONTROL SEAT OPERATION (FRONT RH SEAT) Click here

    C

    INSPECT SEAT HEATER SWITCH Click here

    A

  2. CHECK CLIMATE CONTROL SEAT OPERATION (FRONT LH SEAT)


    1. Check the climate control seat operation again.

      Click here

      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

    B

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Click here

    C

    CHECK HARNESS AND CONNECTOR (IGNITION POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH - BODY GROUND) Click here

    A

  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
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE SEATBACK CLIMATE CONTROL BLOWER LH


    1. Temporarily replace the seatback climate control blower LH with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK CLIMATE CONTROL SEAT OPERATION


    1. Check the climate control seat operation.

      Click here

      OK
      The climate control seat operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (SEATBACK CLIMATE CONTROL BLOWER LH WAS DEFECTIVE)

    NG

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Click here

  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 Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      e10-6 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  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
      for LHD
      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
      for RHD
      Tester Connection Condition Specified Condition
      e10-5 (SI) - F81-11 (SVPB) Always Below 1 Ω
      e10-5 (SI) or F81-11 (SVPB) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Reconnect the F81 air conditioning amplifier assembly connector.

    2. A002B06C07
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Air Conditioning Amplifier Assembly)

      Reconnect the e10 seat cushion climate control blower assembly LH connector.

    3. Check the input signal waveform.


      1. Connect an oscilloscope to terminal F81-10 (SVDB)*1 or F81-11 (SVPB)*2 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*1

        • F81-11 (SVPB) - Body ground*2
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Engine switch on (IG)

        • Seat heater switch (LH side) on

          (blower position)

        • *1: for LHD

        • *2: for RHD

        OK
        Waveform is similar to that shown in the illustration.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Click here

    NG

  9. INSPECT SEAT HEATER SWITCH


    1. Remove the seat heater switch.

      Click here

    2. Inspect the seat heater switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEAT HEATER SWITCH Click here

    OK

  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
      for LHD
      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
      for RHD
      Tester Connection Condition Specified Condition
      Q4-7 (BLLH) - F81-19 (SVPS) Always Below 1 Ω
      Q4-7 (BLLH) or F81-19 (SVPS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. CHECK CLIMATE CONTROL SEAT OPERATION (FRONT RH SEAT)


    1. Check the climate control seat operation again.

      Click here

      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

    B

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Click here

    C

    CHECK HARNESS AND CONNECTOR (IGNITION POWER SUPPLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH - BODY GROUND) Click here

    A

  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
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. REPLACE SEATBACK CLIMATE CONTROL BLOWER RH


    1. Temporarily replace the seatback climate control blower RH with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  14. CHECK CLIMATE CONTROL SEAT OPERATION


    1. Check the climate control operation again.

      Click here

      OK
      The climate control seat operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE)

    NG

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Click here

  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 Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      d10-6 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  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
      for LHD
      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
      for RHD
      Tester Connection Condition Specified Condition
      d10-5 (SI) - F81-10 (SVDB) Always Below 1 Ω
      d10-5 (SI) or F81-10 (SVDB) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Reconnect the F81 air conditioning amplifier assembly connector.

    2. A002B06C08
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Air Conditioning Amplifier Assembly)

      Reconnect the d10 seat cushion climate control blower assembly RH connector.

    3. Check the input signal waveform.


      1. Connect an oscilloscope to terminal F81-11 (SVPB)*1 or F81-10 (SVDB)*2 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*1

        • F81-10 (SVDB) - Body ground*2
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Engine switch on (IG)

        • Seat heater switch (RH side) on

          (blower position)

        • *1: for LHD

        • *2: for RHD

        OK
        Waveform is similar to that shown in the illustration.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Click here

    NG

  18. INSPECT SEAT HEATER SWITCH


    1. Remove the seat heater switch.

      Click here

    2. Inspect the seat heater switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEAT HEATER SWITCH Click here

    OK

  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
      for LHD
      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
      for RHD
      Tester Connection Condition Specified Condition
      Q4-9 (BLRH) - F81-18 (SVDS) Always Below 1 Ω
      Q4-9 (BLRH) or F81-18 (SVDS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  20. INSPECT SEAT HEATER SWITCH


    1. Remove the seat heater switch.

      Click here

    2. Inspect the seat heater switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEAT HEATER SWITCH Click here

    OK

  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
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR