CLIMATE CONTROL SEAT SYSTEM Climate Control Seat System does not Operate

DESCRIPTION

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

WIRING DIAGRAM

A01NJ8PE07

INSPECTION PROCEDURE

PROCEDURE


  1. 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

    B

    SYSTEM CHECK Click here

    C

    INSPECT SEAT HEATER SWITCH Click here

    A

  2. 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 blowers do not operate B

    B

    CHECK HARNESS AND CONNECTOR Click here

    A

  3. CHECK HARNESS AND CONNECTOR


    1. A01NKT9E18
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Back Climate Control Blower LH)

      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)

      Power switch on (IG)

      Blower switch ON (Vol: 1 to 3)

      		 6.7 to 9.3 V

    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

    REPLACE SEAT BACK CLIMATE CONTROL BLOWER LH Click here

  4. CHECK HARNESS AND CONNECTOR


    1. A01NJSNE01
      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)

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Click here

  5. CHECK HARNESS AND CONNECTOR


    1. A01NK7RE09
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly LH)

      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 Power switch on (IG) 11 to 14 V
      a15-4 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. A01NJEFE01
      Text in Illustration
      *1

      Component with harness connected

      (Seat Cushion Climate Control Blower Assembly LH)

      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 Power switch on (IG), seat hater switch ON

    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LH Click here

  7. CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A01NJ0OE01
        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)

        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

    2. for RHD


      1. A01NJ0OE04
        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)

        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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT SEAT HEATER SWITCH


    1. A01NLKDE18
      Text in Illustration
      *1

      Component without harness connected

      (Seat Heater Switch)

      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

    NG

    REPLACE SEAT HEATER SWITCH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A01NK7HE09
        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)

        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

    2. for RHD


      1. A01NK7HE04
        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)

        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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

  10. 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 blowerS do not operate B

    B

    CHECK HARNESS AND CONNECTOR Click here

    A

  11. CHECK HARNESS AND CONNECTOR


    1. Disconnect the Z20 connector.

    2. A01NKT9E14
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Back Climate Control Blower RH)

      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)

      Power switch on (IG)

      Blower switch ON (Vol: 1 to 3)

      		 6.7 to 9.3 V

    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

    REPLACE SEAT BACK CLIMATE CONTROL BLOWER RH Click here

  12. CHECK HARNESS AND CONNECTOR


    1. A01NJSNE02
      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)

      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Click here

  13. CHECK HARNESS AND CONNECTOR


    1. A01NK7RE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly RH)

      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 Power switch on (IG) 11 to 14 V
      Z19-4 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. A01NJEFE02
      Text in Illustration
      *1

      Component with harness connected

      (Seat Cushion Climate Control Blower Assembly RH)

      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 Power switch on (IG), seat heater switch ON

    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RH Click here

  15. CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A01NJ0OE05
        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)

        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

    2. for RHD


      1. A01NJ0OE06
        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)

        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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. INSPECT SEAT HEATER SWITCH


    1. A01NLKDE20
      Text in Illustration
      *1

      Component without harness connected

      (Seat Heater Switch)

      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

    NG

    REPLACE SEAT HEATER SWITCH Click here

    OK

  17. CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A01NK7HE05
        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)

        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

    2. for RHD


      1. A01NK7HE06
        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)

        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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

  18. INSPECT SEAT HEATER SWITCH


    1. A01NLKDE19
      Text in Illustration
      *1

      Component without harness connected

      (Seat Heater Switch)

      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

    NG

    REPLACE SEAT HEATER SWITCH Click here

    OK

  19. CHECK HARNESS AND CONNECTOR


    1. for LHD


      1. A01NK7HE07
        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)

        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

    2. for RHD


      1. A01NK7HE08
        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)

        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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here