SEAT HEATER SYSTEM, Diagnostic DTC:B14C2

DTC Code DTC Name
B14C2 Rear Right Seat Heat Sensor Circuit

DESCRIPTION

Output to the seat heater assembly (rear seat cushion heater RH) temperature sensor stops 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
B14C2 Seat heater temperature sensor malfunction

  • Air conditioning amplifier assembly

  • Seat heater assembly (rear seat cushion heater RH)

  • Seat heater control sub-assembly RH

  • Harness or connector

WIRING DIAGRAM

B00186JE40
*a SHR
*b Seat Heater Assembly (Rear Seat Cushion Heater RH)
*c Seat Heater Control Sub-assembly RH
*d Air Conditioning Amplifier Assembly

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B14C2 is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. READ VALUE USING GTS (RR SEAT HEATER TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.

    5. Read the Data List according to the display on the GTS.

      Air Conditioner
      Tester Display Measurement Item/Display Range Normal Condition Diagnostic Note
      RR Seat Heater Temperature Rear seat RH side seat heater temperature -29.7°C to 59.55°C Within range from 32 to 43°C (89 to 109°F) Rear seat heater is on

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

  4. INSPECT SEAT HEATER ASSEMBLY [REAR SEAT CUSHION HEATER RH]


    1. Remove the seat heater assembly (rear seat cushion heater RH) Click here.

    2. Inspect the seat heater assembly (rear seat cushion heater RH) Click here.


    NG

    REPLACE SEAT HEATER ASSEMBLY (REAR SEAT CUSHION HEATER RH) Click here

    OK

  5. INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY RH


    1. B0019KJE01
      Text in Illustration
      *a

      Seat Heater Control Sub-assembly RH

      (to Air Conditioning Amplifier Assembly)
      *b

      Seat Heater Control Sub-assembly RH

      (to Seat Heater Assembly [Rear Seat Cushion Heater RH])

      Remove the seat heater control sub-assembly RH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      d1-5 (THR) - SHR-2 (TH1) Always Below 1 Ω
      d1-2 (PR) - SHR-3 (TH2) Always Below 1 Ω
      d1-5 (THR) or SHR-2 (TH1) - Body ground Always 10 kΩ or higher
      d1-2 (PR) or SHR-3 (TH2) - Body ground Always 10 kΩ or higher

    NG

    REPLACE SEAT HEATER CONTROL SUB-ASSEMBLY RH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - SEAT HEATER CONTROL SUB-ASSEMBLY RH)


    1. Disconnect the E35 air conditioning amplifier assembly connector.

    2. Disconnect the d1 seat heater control sub-assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E35-27 (TFAR) - d1-5 (THR) Always Below 1 Ω
      E35-35 (SG) - d1-2 (PR) Always Below 1 Ω
      E35-27 (TFAR) or d1-5 (THR) - Body ground Always 10 kΩ or higher
      E35-35 (SG) or d1-2 (PR) - Body ground Always 10 kΩ or higher

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR