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

DESCRIPTION

When the seat climate switch is operated, the seat climate control ECU receives the signal and operates the air seat.

WIRING DIAGRAM

A000X64E16
A000X64E17

PROCEDURE


  1. CONFIRM PROBLEM SYMPTOMS

    Result
    Result Proceed to
    Air conditioner and heater do not operate A
    Heater is normal and air conditioner does not operate B
    Air conditioner is normal and heater does not operate C

    B

    CHECK SEAT CLIMATE CONTROL ECU Click here

    C

    CHECK SEAT CLIMATE CONTROL ECU Click here

    A

  2. CHECK SEAT CLIMATE CONTROL ECU


    1. Remove the seat climate control ECU with its connectors still connected.

    2. A000XRKE02

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      e34-18 (VSL) - Body ground

      Climate Control Switch

      COLD HI to HOT HI

      		 Below 1 to 5 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e4-18 (VSR) - Body ground

      Climate Control Switch

      COLD HI to HOT HI

      		 Below 1 to 5 V

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

  3. INSPECT CLIMATE CONTROL SWITCH

    A000U5IE08

    1. Disconnect the L167 switch connector.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      5 (V5L) - 4 (VSL)

      Climate Control Switch

      HOT HI to COLD HI

      		 Below 1 Ω to 5 kΩ
      for RHD
      Tester Connection Switch Condition Specified Condition
      13 (V5R) - 12 (VSR)

      Climate Control Switch

      HOT HI to COLD HI

      		 Below 1 Ω to 5 kΩ

    NG

    REPLACE CLIMATE CONTROL SWITCH Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - CLIMATE CONTROL SWITCH)

    A000UQ1E02

    1. for LHD:


      1. Disconnect the e34 ECU connector.

      2. Disconnect the L167 switch connector.

    2. for RHD:


      1. Disconnect the e4 ECU connector.

      2. Disconnect the L167 switch connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e34-18 (VSL) - L167-4 (VSL) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      e4-18 (VSR) - L167-12 (VSR) Always Below 1 Ω

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK SEAT CLIMATE CONTROL ECU


    1. Remove the seat climate control ECU with its connectors still connected.

    2. A000TWKE02

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      e34-18 (VSL) - Body ground

      Climate Control Switch

      COLD HI to HOT HI

      		 Below 1 to 5 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e4-18 (VSR) - Body ground

      Climate Control Switch

      COLD HI to HOT HI

      		 Below 1 to 5 V

    NG

    INSPECT CLIMATE CONTROL SWITCH Click here

    OK

  6. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (COOL AIR)


    1. for LHD:

      Select the Active Test, use the intelligent tester to generate a control command, and then check the climate control seat function Click here.

      Front Left Seat A/C
      Tester Display Test Part Control Range
      Cool air Cool air operation OFF / ON

    2. for RHD:

      Select the Active Test, use the intelligent tester to generate a control command, and then check the climate control seat function Click here.

      Front Right Seat A/C
      Tester Display Test Part Control Range
      Cool air Cool air operation OFF / ON
      OK
      Cool air operates normally

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (AIRFLOW) Click here

  7. INSPECT CLIMATE CONTROL SWITCH


    1. A000U5IE09

      Disconnect the L167 switch connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      5 (V5L) - 4 (VSL)

      Climate Control Switch

      HOT HI to COLD HI

      		 Below 1 Ω to 5 kΩ
      5 (V5L) - 3 (VGL) Always 5 kΩ
      for RHD
      Tester Connection Condition Specified Condition
      13 (V5R) - 11 (VGR)

      Climate Control Switch

      HOT HI to COLD HI

      		 Below 1 Ω to 5 kΩ
      13 (V5R) - 12 (VSR) Always 5 kΩ

    NG

    REPLACE CLIMATE CONTROL SWITCH Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - CLIMATE CONTROL SWITCH)

    A000W7AE02

    1. for LHD:


      1. Disconnect the e34 ECU connector.

      2. Disconnect the L167 switch connector.

    2. for RHD:


      1. Disconnect the e4 ECU connector.

      2. Disconnect the L167 switch connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e34-15 (VGL) - L167-3 (VGL) Always Below 1 Ω
      e34-14 (V5L) - e34-18 (VSL) Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e4-15 (VGR) - L167-11 (VGR) Always Below 1 Ω
      e4-14 (V5R) - e4-18 (VSR) Always 10 kΩ or higher

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (AIRFLOW)


    1. for LHD:

      Select the Active Test, use the intelligent tester to generate a control command, and then check the blower motor function Click here.

      Front Left Seat A/C
      Tester Display Test Part Control Range
      Airflow Airflow operation OFF / Low / High

    2. for RHD:

      Select the Active Test, use the intelligent tester to generate a control command, and then check the blower motor function Click here.

      Front Right Seat A/C
      Tester Display Test Part Control Range
      Airflow Airflow operation OFF / Low / High
      OK
      Blower motor operates normally

    NG

    CHECK SEAT CLIMATE CONTROL ECU Click here

    OK

  10. CHECK SEAT CLIMATE CONTROL CONTROLLER (for SEAT CUSHION)


    1. Replace the seat climate control controller (for Seat Cushion) Click here.

    2. Check the climate control seat function is normal.

      OK
      Climate control seat function is normal

    OK

    END (SEAT CLIMATE CONTROL CONTROLLER [for SEAT CUSHION] WAS DEFECTIVE)

    NG

    CHECK SEAT CLIMATE CONTROL CONTROLLER (for SEATBACK) Click here

  11. CHECK SEAT CLIMATE CONTROL ECU


    1. A000V1BE01

      for LHD:


      1. Disconnect the e32 blower connector.

    2. for RHD:


      1. Disconnect the e1 blower connector.

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      e32-2 (BFC+) - e32-4 (BFC-) Power switch off → on (IG) Below 1 V → 11 to 14 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e1-2 (BFC+) - e1-4 (BFC-) Power switch off → on (IG) Below 1 V → 11 to 14 V

    OK

    REPLACE SEAT CLIMATE CONTROL BLOWER Click here

    NG

    CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL BLOWER) Click here

  12. CHECK SEAT CLIMATE CONTROL CONTROLLER (for SEATBACK)


    1. Replace the seat climate control controller (for Seatback) Click here.

    2. Check the climate control seat function is normal.

      OK
      Climate control seat function is normal

    OK

    END (SEAT CLIMATE CONTROL CONTROLLER [for SEATBACK] WAS DEFECTIVE)

    NG

    CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER) Click here

  13. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL BLOWER)


    1. for LHD:

      A00100AE01

      1. Disconnect the e34 ECU connector.

      2. Disconnect the e32 blower connector.

    2. for RHD:


      1. Disconnect the e4 ECU connector.

      2. Disconnect the e1 blower connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e34-4 (BFC+) - e32-2 (BFC+) Always Below 1 Ω
      e34-6 (BFC-) - e32-4 (BFC-) Always Below 1 Ω
      e34-5 (BCS) - e32-3 (BCS) Always Below 1 Ω
      e34-4 (BFC+) - Body ground Always 10 kΩ or higher
      e34-6 (BFC-) - Body ground Always 10 kΩ or higher
      e34-5 (BCS) - Body ground Always 10 kΩ or higher
      e34-4 (BFC+) - e34-6 (BFC-) Always 10 kΩ or higher
      e34-5 (BCS) - e34-4 (BFC+) Always 10 kΩ or higher
      e34-5 (BCS) - e34-6 (BFC-) Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e4-4 (BFC+) - e1-2 (BFC+) Always Below 1 Ω
      e4-6 (BFC-) - e1-4 (BFC-) Always Below 1 Ω
      e4-5 (BCS) - e1-3 (BCS) Always Below 1 Ω
      e4-4 (BFC+) - Body ground Always 10 kΩ or higher
      e4-6 (BFC-) - Body ground Always 10 kΩ or higher
      e4-5 (BCS) - Body ground Always 10 kΩ or higher
      e4-4 (BFC+) - e4-6 (BFC-) Always 10 kΩ or higher
      e4-5 (BCS) - e4-4 (BFC+) Always 10 kΩ or higher
      e4-5 (BCS) - e4-6 (BFC-) Always 10 kΩ or higher

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER)


    1. for LHD:

      A000THZE01

      1. Disconnect the e34 ECU connector.

      2. Disconnect the e33 and e51 controller connectors.

    2. for RHD:


      1. Disconnect the e4 ECU connector.

      2. Disconnect the e2 and e21 controller connectors.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e34-8 (TDC+) - e33-1 (TDC+) Always Below 1 Ω
      e34-7 (TDC-) - e51-2 (TDB-) Always Below 1 Ω
      e33-2 (TDC-) - e51-1 (TDB+) Always Below 1 Ω
      e34-8 (TDC+) - Body ground Always 10 kΩ or higher
      e34-7 (TDC-) - Body ground Always 10 kΩ or higher
      e33-2 (TDC-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e4-8 (TDC+) - e2-1 (TDC+) Always Below 1 Ω
      e4-7 (TDC-) - e21-2 (TDB-) Always Below 1 Ω
      e2-2 (TDC-) - e21-1 (TDB+) Always Below 1 Ω
      e4-8 (TDC+) - Body ground Always 10 kΩ or higher
      e4-7 (TDC-) - Body ground Always 10 kΩ or higher
      e2-2 (TDC-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. CHECK SEAT CLIMATE CONTROL ECU


    1. Remove the seat climate control ECU with its connectors still connected.

    2. A000YNHE02

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      e34-18 (VSL) - Body ground

      Climate Control Switch

      COLD HI to HOT HI

      		 Below 1 to 5 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e4-18 (VSR) - Body ground

      Climate Control Switch

      COLD HI to HOT HI

      		 Below 1 to 5 V

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

  16. INSPECT CLIMATE CONTROL SWITCH

    A000U5IE10

    1. Disconnect the L167 switch connector.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      5 (V5L) - 4 (VSL)

      Climate Control Switch

      HOT HI to COLD HI

      		 Below 1 Ω to 5 kΩ
      for RHD
      Tester Connection

      Climate Control Switch

      Switch Condition

      		 Specified Condition
      13 (V5R) - 12 (VSR) HOT HI to COLD HI Below 1 Ω to 5 kΩ

    NG

    REPLACE CLIMATE CONTROL SWITCH Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - CLIMATE CONTROL SWITCH)

    A000YAYE02

    1. for LHD:


      1. Disconnect the e34 ECU connector.

      2. Disconnect the L167 switch connector.

    2. for RHD:


      1. Disconnect the e4 ECU connector.

      2. Disconnect the L167 switch connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e34-14 (V5L) - L167-5 (V5L) Always Below 1 Ω
      e34-18 (VSL) - L167-4 (VSL) Always Below 1 Ω
      e34-15 (VGL) - L167-3 (VGL) Always Below 1 Ω
      e34-14 (V5L) - Body ground Always 10 kΩ or higher
      e34-18 (VSL) - Body ground Always 10 kΩ or higher
      e34-15 (VGL) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e4-14 (V5R) - L167-13 (V5R) Always Below 1 Ω
      e4-18 (VSR) - L167-12 (VSR) Always Below 1 Ω
      e4-15 (VGR) - L167-11 (VGR) Always Below 1 Ω
      e4-14 (V5R) - Body ground Always 10 kΩ or higher
      e4-18 (VSR) - Body ground Always 10 kΩ or higher
      e4-15 (VGR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. INSPECT FRONT SEAT CUSHION COVER


    1. Remove the front seat cushion cover Click here.

    2. Inspect the front seat cushion cover Click here.


    NG

    REPLACE FRONT SEAT CUSHION COVER Click here

    OK

  19. INSPECT FRONT SEATBACK COVER


    1. Remove the front seatback cover Click here.

    2. Inspect the front seatback cover Click here.


    NG

    REPLACE FRONT SEATBACK COVER Click here

    OK

  20. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - FRONT SEAT CUSHION COVER)

    A000Y11E02

    1. for LHD:


      1. Disconnect the e116 ECU connector.

      2. Disconnect the e115 cushion cover connector.

    2. for RHD:


      1. Disconnect the e105 ECU connector.

      2. Disconnect the e107 cushion cover connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e116-1 (AMP) - e115-4 (SWL) Always Below 1 Ω
      e116-1 (AMP) - Body ground Always 10 kΩ or higher
      e115-3 (E) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e105-1 (AMP) - e107-4 (SWR) Always Below 1 Ω
      e105-1 (AMP) - Body ground Always 10 kΩ or higher
      e107-3 (E) - Body ground Always 10 kΩ or higher

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR