SEAT HEATER SYSTEM, Diagnostic DTC:B14F2

DTC Code DTC Name
B14F2 Seat Heater Temperature Sensor Malfunction

DESCRIPTION

Outputs to the rear cushion cover's temperature sensor stop if one of the following occurs: 1) the temperature sensor is open or shorted; or 2) the temperature sensor is damaged and its output value does not change.

DTC Code DTC Detection Condition Trouble Area
B14F2 Seat heater temperature sensor malfunction

  • Rear seat cushion cover

  • Rear seatback cover LH, RH

  • Seat climate control ECU LH, RH

  • Harness or connector

WIRING DIAGRAM

A000V6KE07
for LH Side
*a HS
*b Rear Seat Cushion Cover
*c Seat Climate Control ECU LH
*d Rear Seatback Cover LH
A000V6KE08
for RH Side
*a HS
*b Rear Seat Cushion Cover
*c Seat Climate Control ECU RH
*d Rear Seatback Cover RH

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is output (Rear seat climate control ECU LH) A
      DTC is output (Rear seat climate control ECU RH) B
      DTC is not output C

    B

    READ VALUE USING INTELLIGENT TESTER (SEAT HEATER TEMPERATURE SENSOR) Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (SEAT HEATER TEMPERATURE SENSOR)


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

      Rear Left Seat A/C
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seat Heat Temp Seat heater 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 LH Click here

    NG

  3. INSPECT REAR SEAT CUSHION COVER LH


    1. Remove the rear seat cushion cover LH Click here.

    2. Inspect the rear seat cushion cover LH Click here.


    NG

    REPLACE REAR SEAT CUSHION COVER LH Click here

    OK

  4. INSPECT REAR SEATBACK COVER LH


    1. Remove the rear seatback cover LH Click here.

    2. Inspect the rear seatback cover LH Click here.


    NG

    REPLACE REAR SEATBACK COVER LH Click here

    OK

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

    A00100WE02
    *1 Front view of wire harness connector: (to Seat Climate Control ECU LH)
    *2 HS
    *3 Front view of wire harness connector: (to Rear Seatback Cover LH)

    1. Disconnect the f48 ECU connector.

    2. Disconnect the f49 seatback cover connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f48-6 (H5) - f49-2 (THL) Always Below 1 Ω
      f48-7 (HS) - f49-3 (PL) Always Below 1 Ω
      f48-6 (H5) - Body ground Always 10 kΩ or higher
      f48-7 (HS) - Body ground Always 10 kΩ or higher

    OK

    REPLACE SEAT CLIMATE CONTROL ECU LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. READ VALUE USING INTELLIGENT TESTER (SEAT HEATER TEMPERATURE SENSOR)


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

      Rear Right Seat A/C
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Seat Heat Temp Seat heater 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 RH Click here

    NG

  7. INSPECT REAR SEAT CUSHION COVER RH


    1. Remove the rear seat cushion cover RH Click here.

    2. Inspect the rear seat cushion cover RH Click here.


    NG

    REPLACE REAR SEAT CUSHION COVER RH Click here

    OK

  8. INSPECT REAR SEATBACK COVER RH


    1. Remove the rear seatback cover RH Click here.

    2. Inspect the rear seatback cover RH Click here.


    NG

    REPLACE REAR SEATBACK COVER RH Click here

    OK

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

    A000Z7JE02
    *1 Front view of wire harness connector: (to Seat Climate Control ECU RH)
    *2 HS
    *3 Front view of wire harness connector: (to Rear Seatback Cover RH)

    1. Disconnect the f47 ECU connector.

    2. Disconnect the f46 seatback cover connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f47-6 (H5) - f46-2 (THR) Always Below 1 Ω
      f47-7 (HS) - f46-3 (PR) Always Below 1 Ω
      f47-6 (H5) - Body ground Always 10 kΩ or higher
      f47-7 (HS) - Body ground Always 10 kΩ or higher

    OK

    REPLACE SEAT CLIMATE CONTROL ECU RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR