CLIMATE CONTROL SEAT SYSTEM, Diagnostic DTC:B14F3

DTC Code DTC Name
B14F3 Overcurrent Detected in Cushion Peltier

DESCRIPTION

The seat climate control ECU stops output to the seat climate control controller if a short, etc. in the seat climate control controller, wire harness or ECU interior circuit causes overcurrent.

DTC Code DTC Detection Condition Trouble Area
B14F3 Overcurrent Detected in Cushion Peltier

  • Seat climate control ECU

  • Seat climate control controller

  • Rear seatback climate control blower

  • Harness or connector

WIRING DIAGRAM

A01H1RHE01
A01GXHRE05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is output (Front seat climate control ECU LH) A
      DTC is output (Front seat climate control ECU RH) B
      DTC is output (Rear seat climate control ECU LH) C
      DTC is output (Rear seat climate control ECU RH) D

    B

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

    C

    CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - JOINING CONNECTOR AND REAR SEATBACK CLIMATE CONTROL BLOWER LH) Click here

    D

    CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - JOINING CONNECTOR AND REAR SEATBACK CLIMATE CONTROL BLOWER RH) Click here

    A

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


    1. A01GYI6E01

      Disconnect the e34 ECU connector.

    2. Disconnect the e33 and e51 controller connectors.

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

      Standard resistance
      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
      e34-8 (TDC+) - e34-7 (TDC-) Always 10 kΩ or higher
      e33-1 (TDC+) - e33-2 (TDC-) Always 10 kΩ or higher
      e51-1 (TDB+) - e51-2 (TDB-) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK SEAT CLIMATE CONTROL CONTROLLER LH (for SEAT CUSHION)


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

    2. Check for DTC Click here.

      OK
      DTC is not output.

    NG

    CHECK SEAT CLIMATE CONTROL CONTROLLER LH (for SEATBACK) Click here

    OK

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

  4. CHECK SEAT CLIMATE CONTROL CONTROLLER LH (for SEATBACK)


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

    2. Check for DTC Click here.

      OK
      DTC is not output.

    NG

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    OK

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

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


    1. A01GYI6E02

      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
      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
      e4-8 (TDC+) - e4-7 (TDC-) Always 10 kΩ or higher
      e2-1 (TDC+) - e2-2 (TDC-) Always 10 kΩ or higher
      e21-1 (TDB+) - e21-2 (TDB-) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK SEAT CLIMATE CONTROL CONTROLLER RH (for SEAT CUSHION)


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

    2. Check for DTC Click here.

      OK
      DTC is not output.

    NG

    CHECK SEAT CLIMATE CONTROL CONTROLLER RH (for SEATBACK) Click here

    OK

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

  7. CHECK SEAT CLIMATE CONTROL CONTROLLER RH (for SEATBACK)


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

    2. Check for DTC Click here.

      OK
      DTC is not output.

    NG

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    OK

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

  8. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - JOINING CONNECTOR AND REAR SEATBACK CLIMATE CONTROL BLOWER LH)

    A01H0LWE05

    1. Disconnect the f28 ECU connector.

    2. Disconnect the fz2 joining connector.

    3. Disconnect the f32 blower connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f28-8 (TDC+) - fz2-1 Always Below 1 Ω
      f28-7 (TDC-) - f32-2 (TDB-) Always Below 1 Ω
      f32-1 (TDB+) - fz2-2 Always Below 1 Ω
      f28-8 (TDC+) - Body ground Always 10 kΩ or higher
      f28-7 (TDC-) - Body ground Always 10 kΩ or higher
      f32-1 (TDB+) - Body ground Always 10 kΩ or higher
      f28-8 (TDC+) - f28-7 (TDC-) Always 10 kΩ or higher
      f32-1 (TDB+) - f32-2 (TDB-) Always 10 kΩ or higher
      fz2-1 - fz2-2 Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (JOINING CONNECTOR - SEAT CLIMATE CONTROL CONTROLLER LH)

    A01H14PE19

    1. Disconnect the fz2 joining connector.

    2. Disconnect the z65 controller connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      fz2-1 - z65-1 (TDC-) Always Below 1 Ω
      fz2-2 - z65-2 (TDC+) Always Below 1 Ω
      fz2-1 - Body ground Always 10 kΩ or higher
      fz2-2 - Body ground Always 10 kΩ or higher
      z65-1 (TDC-) - z65-2 (TDC+) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK SEAT CLIMATE CONTROL CONTROLLER LH


    1. except Ottoman:

      Replace the seat climate control controller LH Click here.

    2. for Ottoman:

      Replace the seat climate control controller LH Click here.

    3. Check for DTC Click here.

      OK
      DTC is not output.

    NG

    CHECK REAR SEAT BACK CLIMATE CONTROL BLOWER LH Click here

    OK

    END ((SEAT CLIMATE CONTROL CONTROLLER LH WAS DEFECTIVE)

  11. CHECK REAR SEAT BACK CLIMATE CONTROL BLOWER LH


    1. except Ottoman:

      Replace the rear seatback climate control blower LH Click here.

    2. for Ottoman:

      Replace the rear seatback climate control blower LH Click here.

    3. Check for DTC Click here.

      OK
      DTC is not output.
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    C

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    A

    END (REAR SEATBACK CLIMATE CONTROL BLOWER LH WAS DEFECTIVE)

  12. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - JOINING CONNECTOR AND REAR SEATBACK CLIMATE CONTROL BLOWER RH)

    A01H0LWE06

    1. Disconnect the f8 ECU connector.

    2. Disconnect the fz1 joining connector.

    3. Disconnect the f12 blower connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f8-8 (TDC+) - fz1-1 Always Below 1 Ω
      f8-7 (TDC-) - f12-2 (TDB-) Always Below 1 Ω
      f12-1 (TDB+) - fz1-2 Always Below 1 Ω
      f8-8 (TDC+) - Body ground Always 10 kΩ or higher
      f8-7 (TDC-) - Body ground Always 10 kΩ or higher
      f12-1 (TDB+) - Body ground Always 10 kΩ or higher
      f8-8 (TDC+) - f8-7 (TDC-) Always 10 kΩ or higher
      f12-1 (TDB+) - f12-2 (TDB-) Always 10 kΩ or higher
      fz1-1 - fz1-2 Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (JOINING CONNECTOR - SEAT CLIMATE CONTROL CONTROLLER RH)

    A01H14PE20

    1. Disconnect the fz1 joining connector.

    2. Disconnect the z63 controller connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      fz1-1 - z63-1 (TDC-) Always Below 1 Ω
      fz1-2 - z63-2 (TDC+) Always Below 1 Ω
      fz1-1 - Body ground Always 10 kΩ or higher
      fz1-2 - Body ground Always 10 kΩ or higher
      z63-1 (TDC-) - z63-2 (TDC+) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK SEAT CLIMATE CONTROL CONTROLLER RH


    1. except Ottoman:

      Replace the seat climate control controller RH Click here.

    2. for Ottoman:

      Replace the seat climate control controller RH Click here.

    3. Check for DTC Click here.

      OK
      DTC is not output.

    NG

    CHECK REAR SEAT BACK CLIMATE CONTROL BLOWER RH Click here

    OK

    END (SEAT CLIMATE CONTROL CONTROLLER RH WAS DEFECTIVE)

  15. CHECK REAR SEAT BACK CLIMATE CONTROL BLOWER RH


    1. except Ottoman:

      Replace the rear seatback climate control blower RH Click here.

    2. for Ottoman:

      Replace the rear seatback climate control blower RH Click here.

    3. Check for DTC Click here.

      OK
      DTC is not output.
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    C

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    A

    END (REAR SEATBACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE)