SEAT HEATER SYSTEM, Diagnostic DTC:B14C1

DTC Code DTC Name
B14C1 Front Left Seat Heat Sensor Circuit

DESCRIPTION

Output to the front seat cushion heater 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 No. Detection Item DTC Detection Condition Trouble Area
B14C1 Front Left Seat Heat Sensor Circuit Seat heater temperature sensor malfunction

  • Air conditioning amplifier assembly

  • Separate type front seat cushion cover (front left seat)*1

  • Front seat cushion pad with cover LH*2

  • Wire harness or connector

WIRING DIAGRAM

A00218SE04

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 B14C1 is not output.
      Result
      Result Proceed to
      OK A
      NG (for Standard Seat Type) B
      NG (for Sports Seat Type) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    INSPECT FRONT SEAT CUSHION PAD WITH COVER LH Click here

    B

  3. INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT LEFT SEAT)


    1. Remove the separate type front seat cushion cover (front left seat).

      Click here

    2. Inspect the separate type front seat cushion cover (front left seat).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT LEFT SEAT) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT LEFT SEAT))


    1. Disconnect the K11 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K11-19 (TSL) - b5-1 (THL) Always Below 1 Ω
      K11-19 (TSL) - Body ground Always 10 kΩ or higher
      b5-1 (THL) - Body ground Always 10 kΩ or higher
      K11-35 (SG-4) - b5-7 (PL) Always Below 1 Ω
      K11-35 (SG-4) - Body ground Always 10 kΩ or higher
      b5-7 (PL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. INSPECT FRONT SEAT CUSHION PAD WITH COVER LH


    1. Remove the front seat cushion pad with cover LH.

      Click here

    2. Inspect the front seat cushion pad with cover LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT CUSHION PAD WITH COVER LH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - FRONT SEAT CUSHION PAD WITH COVER LH)


    1. Disconnect the K11 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K11-19 (TSL) - b5-1 (THL) Always Below 1 Ω
      K11-19 (TSL) - Body ground Always 10 kΩ or higher
      b5-1 (THL) - Body ground Always 10 kΩ or higher
      K11-35 (SG-4) - b5-7 (PL) Always Below 1 Ω
      K11-35 (SG-4) - Body ground Always 10 kΩ or higher
      b5-7 (PL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR