SEAT HEATER SYSTEM, Diagnostic DTC:B14C3

DTC Code DTC Name
B14C3 Rear Left Seat Heat Sensor Circuit

DESCRIPTION

Output to the rear 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
B14C3 Rear Left Seat Heat Sensor Circuit Seat heater temperature sensor malfunction

  • Air conditioning amplifier assembly

  • Separate type rear seat cushion cover LH*1

  • Bench type rear seat cushion cover*2

  • Harness or connector

WIRING DIAGRAM

Figure 1. w/ Rear Power Seat:

B004S7BE15
*a Separate Type Rear Seat Cushion Cover LH
*b Air Conditioning Amplifier Assembly

Figure 2. w/o Rear Power Seat:

B004S7BE16
*a Bench Type Rear Seat Cushion Cover
*b Air Conditioning Amplifier Assembly

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 B14C3 is not output.
      Result
      Result Proceed to
      OK A
      NG (w/ Rear Power Seat) B
      NG (w/o Rear Power Seat) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    INSPECT BENCH TYPE REAR SEAT CUSHION COVER Click here

    B

  3. INSPECT SEPARATE TYPE REAR SEAT CUSHION COVER LH


    1. Remove the separate type rear seat cushion cover LH.

      Click here

    2. Inspect the separate type rear seat cushion cover LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEPARATE TYPE REAR SEAT CUSHION COVER LH Click here

    OK

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


    1. Disconnect the G63 air conditioning amplifier assembly connector.

    2. Disconnect the T9 separate type rear seat cushion cover LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-19 (TFAL) - T9-3 Always Below 1 Ω
      G63-19 (TFAL) or T9-3 - Other terminals and body ground Always 10 kΩ or higher
      G63-9 (SG-6) - T9-4 Always Below 1 Ω
      G63-9 (SG-6) or T9-4 - Other terminals and 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 BENCH TYPE REAR SEAT CUSHION COVER


    1. Remove the bench type rear seat cushion cover.

      Click here

    2. Inspect the bench type rear seat cushion cover.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BENCH TYPE REAR SEAT CUSHION COVER Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BENCH TYPE REAR SEAT CUSHION COVER)


    1. Disconnect the G63 air conditioning amplifier assembly connector.

    2. Disconnect the R62 bench type rear seat cushion cover connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G63-19 (TFAL) - R62-9 Always Below 1 Ω
      G63-19 (TFAL) or R62-9 - Other terminals and body ground Always 10 kΩ or higher
      G63-9 (SG-6) - R62-3 Always Below 1 Ω
      G63-9 (SG-6) or R62-3 - Other terminals and 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