CLIMATE CONTROL SEAT SYSTEM, Diagnostic DTC:B14F1

DTC Code DTC Name
B14F1 Seatback Peltier Temperature Sensor Malfunction

DESCRIPTION

Outputs to the seat climate control controller or rear seatback climate controller blower stop if one of the following occurs: 1) the seat climate control controller temperature sensor or rear seatback climate control blower temperature sensor is open or shorted; or 2) either temperature sensor is damaged and its output value does not change.

DTC Code DTC Detection Condition Trouble Area
B14F1 Seatback Peltier Temperature Sensor Malfunction

  • Seat climate control controller

  • Rear seatback climate control blower

  • Seat climate control ECU

  • Harness or connector

WIRING DIAGRAM

A01GKXZE23
A01GKXZE28

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

    READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR) Click here

    C

    READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR) Click here

    D

    READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR) Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR)


    1. Check the Data List for proper functioning of the temperature sensor Click here.

      Front Left Seat A/C
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seatback Temp Seat back temperature sensor signal / MIN: 0°C (32°F), MAX: 85°C (185°F) Within range from 0 to 85°C (32 to 185°F) -
      OK
      The display is as specified in the normal condition.

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

  3. INSPECT SEAT CLIMATE CONTROL CONTROLLER LH

    A01GIAUE13

    1. Disconnect the e51 climate control controller connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      3 (TB5) - 4 (TBS) Outside air temperature 10 to 30°C (50 to 86°F) 1.85 to 0.8 kΩ

    NG

    REPLACE SEAT CLIMATE CONTROL CONTROLLER LH Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER LH AND BODY GROUND)

    A01GNDUE21

    1. Disconnect the e34 ECU connector.

    2. Disconnect the e51 climate control controller connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      e34-20 (TB5) - e51-3 (TB5) Always Below 1 Ω
      e34-17 (TBS) - e51-4 (TBS) Always Below 1 Ω
      e34-20 (TB5) - Body ground Always 10 kΩ or higher
      e34-17 (TBS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

  5. READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR)


    1. Check the Data List for proper functioning of the temperature sensor Click here.

      Front Right Seat A/C
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seatback Temp Seat back temperature sensor signal / MIN: 0°C (32°F), MAX: 85°C (185°F) Within range from 0 to 85°C (32 to 185°F) -
      OK
      The display is as specified in the normal condition.

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    NG

  6. INSPECT SEAT CLIMATE CONTROL CONTROLLER RH

    A01GIAUE14

    1. Disconnect the e21 climate control controller connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      3 (TB5) - 4 (TBS) Outside air temperature 10 to 30°C (50 to 86°F) 1.85 to 0.8 kΩ

    NG

    REPLACE SEAT CLIMATE CONTROL CONTROLLER RH Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE CONTROL CONTROLLER RH AND BODY GROUND)

    A01GNDUE22

    1. Disconnect the e4 ECU connector.

    2. Disconnect the e21 climate control controller connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      e4-20 (TB5) - e21-3 (TB5) Always Below 1 Ω
      e4-17 (TBS) - e21 (TBS) Always Below 1 Ω
      e4-20 (TB5) - Body ground Always 10 kΩ or higher
      e4-17 (TBS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SEAT CLIMATE CONTROL ECU Click here

  8. READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR)


    1. Check the Data List for proper functioning of the temperature sensor Click here.

      Rear Left Seat A/C
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seatback Temp Seatback temperature sensor signal / MIN: 0°C (32°F), MAX: 85°C (185°F) Within range from 0 to 85°C (32 to 185°F) -
      OK
      The display is as specified in the normal condition.
      Result
      Result Proceed to
      NG A
      OK (w/o Ottoman) B
      OK (w/ Ottoman) C

    B

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    C

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    A

  9. INSPECT REAR SEATBACK CLIMATE CONTROL BLOWER LH

    A01GIAUE15

    1. Disconnect the f32 climate control blower connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      3 (TB5) - 4 (TBS) Outside air temperature 10 to 30°C (50 to 86°F) 1.85 to 0.8 kΩ
      Result
      Result Proceed to
      OK A
      NG (w/o Ottoman) B
      NG (w/ Ottoman) C

    B

    REPLACE REAR SEATBACK CLIMATE CONTROL BLOWER LH Click here

    C

    REPLACE REAR SEATBACK CLIMATE CONTROL BLOWER LH Click here

    A

  10. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - REAR SEATBACK CLIMATE CONTROL BLOWER LH AND BODY GROUND)

    A01GNDUE23

    1. Disconnect the f28 ECU connector.

    2. Disconnect the f32 climate control blower connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f28-20 (TB5) - f32-3 (TB5) Always Below 1 Ω
      f28-17 (TBS) - f32-4 (TBS) Always Below 1 Ω
      f28-20 (TB5) - Body ground Always 10 kΩ or higher
      f28-17 (TBS) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/o Ottoman) A
      OK (w/ Ottoman) B
      NG C

    B

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE SEAT CLIMATE CONTROL ECU Click here

  11. READ VALUE USING INTELLIGENT TESTER (SEATBACK TEMPERATURE SENSOR)


    1. Check the Data List for proper functioning of the temperature sensor Click here.

      Rear Right Seat A/C
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seatback Temp Seatback temperature sensor signal / MIN: 0°C (32°F), MAX: 85°C (185°F) Within range from 0 to 85°C (32 to 185°F) -
      OK
      The display is as specified in the normal condition.
      Result
      Result Proceed to
      NG A
      OK (w/o Ottoman) B
      OK (w/ Ottoman) C

    B

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    C

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    A

  12. INSPECT REAR SEATBACK CLIMATE CONTROL BLOWER RH

    A01GIAUE16

    1. Disconnect the f12 climate control blower connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      3 (TB5) - 4 (TBS) Outside air temperature 10 to 30°C (50 to 86°F) 1.85 to 0.8 kΩ
      Result
      Result Proceed to
      OK A
      NG (w/o Ottoman) B
      NG (w/ Ottoman) C

    B

    REPLACE REAR SEATBACK CLIMATE CONTROL BLOWER RH Click here

    C

    REPLACE REAR SEATBACK CLIMATE CONTROL BLOWER RH Click here

    A

  13. CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - REAR SEATBACK CLIMATE CONTROL BLOWER RH AND BODY GROUND)

    A01GNDUE24

    1. Disconnect the f8 ECU connector.

    2. Disconnect the f12 climate control blower connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f8-20 (TB5) - f12-3 (TB5) Always Below 1 Ω
      f8-17 (TBS) - f12-4 (TBS) Always Below 1 Ω
      f8-20 (TB5) - Body ground Always 10 kΩ or higher
      f8-17 (TBS) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/o Ottoman) A
      OK (w/ Ottoman) B
      NG C

    B

    REPLACE SEAT CLIMATE CONTROL ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE SEAT CLIMATE CONTROL ECU Click here