CLIMATE CONTROL SEAT SYSTEM Climate Control System does not Operate on Driver Side

DESCRIPTION

The air conditioning amplifier assembly receives refreshing seat switch position signals when the power switch is on (IG), and then transmits airflow amount signals to each seat climate blower.

WIRING DIAGRAM

B000OUSE07

CAUTION / NOTICE / HINT

Note


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

  • The climate control seat system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the climate control seat system after confirming that the communication system is functioning properly.

    Click here

  • If the auxiliary battery voltage is low, the seat climate control seat system may not operate. When "High Power Consumption Partial Limit On AC/Heater Operation" is displayed on the multi-information display in the combination meter assembly, inspect the auxiliary battery, referring to On-vehicle Inspection for the charging system.

    Click here

Tech Tips

If the auxiliary battery voltage is low, the climate control seat system may not operate. When "High Power Consumption Partial Limit On AC/Heater Operation" is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

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PROCEDURE


  1. CHECK CLIMATE CONTROL SEAT OPERATION (DRIVER SEAT)


    1. Check the climate control seat operation again.

      Click here

      Result
      Result Proceed to
      Only seatback climate control blower (driver seat) does not operate A
      Only seat cushion climate control blower assembly (driver seat) does not operate B
      Both climate control blowers (driver seat) do not operate C

    B

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT) Click here

    C

    CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SAET) - BATTERY AND BODY GROUND) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT) - SEATBACK CLIMATE CONTROL BLOWER (DRIVER SEAT))


    1. for LHD:


      1. Disconnect the w6 seat cushion climate control blower assembly LH connector.

      2. Disconnect the y1 seatback 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
        w6-5 (CTB) - y1-1 (IG) Always Below 1 Ω
        w6-5 (CTB) or y1-1 (IG) - Other terminals and body ground Always 10 kΩ or higher
        w6-6 (BBS) - y1-3 (BFB+) Always Below 1 Ω
        w6-6 (BBS) or y1-3 (BFB+) - Other terminals and body ground Always 10 kΩ or higher
        w6-4 (BFB) - y1-4 (GND) Always Below 1 Ω
        w6-4 (BFB) or y1-4 (GND) - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the v6 seat cushion climate control blower assembly RH connector.

      2. Disconnect the x1 seatback 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
        v6-5 (CTB) - x1-1 (IG) Always Below 1 Ω
        v6-5 (CTB) or x1-1 (IG) - Other terminals and body ground Always 10 kΩ or higher
        v6-6 (BBS) - x1-3 (BFB+) Always Below 1 Ω
        v6-6 (BBS) or x1-3 (BFB+) - Other terminals and body ground Always 10 kΩ or higher
        v6-4 (BFB) - x1-4 (GND) Always Below 1 Ω
        v6-4 (BFB) or x1-4 (GND) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE SEATBACK CLIMATE CONTROL BLOWER (DRIVER SEAT)


    1. Temporarily replace the seatback climate control blower (driver seat) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. 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 (DRIVER SEAT) WAS DEFECTIVE)

    NG

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT) Click here

  5. CHECK HARNESS AND CONNECTOR (SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SAET) - BATTERY AND BODY GROUND)


    1. B000QH7C16
      *a

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly LH)

      for LHD:


      1. Disconnect the seat cushion climate control blower assembly LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        w6-8 (GND) - Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        w6-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
        Power switch off Below 1 V
    2. B000QH7C17
      *a

      Front view of wire harness connector

      (to Seat Cushion Climate Control Blower Assembly RH)

      for RHD:


      1. Disconnect the seat cushion climate control blower assembly RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        v6-8 (GND) - Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        v6-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
        Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT))


    1. for LHD:


      1. Disconnect the P58 air conditioning amplifier assembly connector.

      2. Disconnect the w6 seat cushion climate control blower assembly LH

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        P58-24 (LOUT) - w6-7 (SIGN) Always Below 1 Ω
        P58-24 (LOUT) or w6-7 (SIGN) - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the P58 air conditioning amplifier assembly connector.

      2. Disconnect the v6 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
        P58-23 (ROUT) - v6-7 (SIGN) Always Below 1 Ω
        P58-23 (ROUT) or v6-7 (SIGN) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


    1. Check for pulses according to the value(s) in the table below.


      1. B000OKPC04
        *a

        Component with harness connected

        (Air Conditioning Amplifier Assembly)

        for LHD:

        Measurement Condition
        Item Content
        Tester Connection P58-24 (LOUT) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Power switch on (IG)

        • Ventilation volume switch LH on
      2. B000OKPC03
        *a

        Component with harness connected

        (Air Conditioning Amplifier Assembly)

        for RHD:

        Measurement Condition
        Item Content
        Tester Connection P58-23 (ROUT) - Body ground
        Tool Setting 1 V/DIV., 1 ms/DIV.
        Vehicle Condition

        • Power switch on (IG)

        • Ventilation volume switch RH on
      OK
      Waveform is similar to that shown in the illustration.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY (DRIVER SEAT) Click here

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here