SEAT HEATER SYSTEM, Diagnostic DTC:B14C2

DTC Code DTC Name
B14C2 Rear Right Seat Heat Sensor Circuit

DESCRIPTION

Power supply to the temperature sensor built into the rear seat cushion heater stops if one of the following occurs: 1) an open or short occurs in the temperature sensor circuit; or 2) the temperature sensor is damaged and its output value does not change.

DTC No. Detection Item DTC Detection Condition Trouble Area
B14C2 Rear Right Seat Heat Sensor Circuit Seat heater temperature sensor malfunction

  • Air conditioning amplifier assembly

  • Rear seat cushion heater (separate type rear seat cushion cover (for RH side))

  • Seat heater control sub-assembly (for rear RH side)

  • Wire harness or connector

WIRING DIAGRAM

B007WTWE04
*a Air Conditioning Amplifier Assembly
*b Seat Heater Control Sub-assembly (for Rear RH Side)
*c Rear Seat Cushion Heater (Separate Type Rear Seat Cushion Cover (for RH Side))

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Air Conditioner > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes
      OK
      DTC B14C2 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. INSPECT REAR SEAT CUSHION HEATER (SEPARATE TYPE REAR SEAT CUSHION COVER (FOR RH SIDE))


    1. Remove the rear seat cushion heater (separate type rear seat cushion cover (for RH side)).

      Click here

    2. Inspect the rear seat cushion heater (separate type rear seat cushion cover (for RH side)).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT CUSHION HEATER (SEPARATE TYPE REAR SEAT CUSHION COVER (FOR RH SIDE)) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - REAR SEAT CUSHION HEATER (SEPARATE TYPE REAR SEAT CUSHION COVER (FOR RH SIDE)))


    1. Disconnect the J42 and J48 air conditioning amplifier assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J42-23 (TFAR) - x5-5 (THR) Always Below 1 Ω
      J42-23 (TFAR) or x5-5 (THR) - Body ground Always 10 kΩ or higher
      J48-21 (SG-8) - x5-2 (PR) Always Below 1 Ω
      J48-21 (SG-8) or x5-2 (PR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE SEAT HEATER CONTROL SUB-ASSEMBLY (FOR REAR RH SIDE)


    1. Temporarily replace the seat heater control sub-assembly (for rear RH side) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Air Conditioner > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes
      OK
      DTC B14C2 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (SEAT HEATER CONTROL SUB-ASSEMBLY (FOR REAR RH SIDE) WAS DEFECTIVE)

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here