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

  • Front seat cushion heater assembly LH*1

  • Front seat cushion pad with cover LH*2

  • Harness or connector

WIRING DIAGRAM

B004CI2E03
*a Front Seat Cushion Heater Assembly LH
*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 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 FRONT SEAT CUSHION HEATER ASSEMBLY LH


    1. Remove the front seat cushion heater assembly LH.

      Click here

    2. Inspect the front seat cushion heater assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT CUSHION HEATER ASSEMBLY LH Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - FRONT SEAT CUSHION HEATER ASSEMBLY LH)


    1. Disconnect the P56 and P57 air conditioning amplifier assembly connectors.

    2. Disconnect the w5 front seat cushion heater assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P56-17 (TSL) - w5-4 Always Below 1 Ω
      P56-17 (TSL) or w5-4 - Other terminals and body ground Always 10 kΩ or higher
      P57-8 (SG-5) - w5-5 Always Below 1 Ω
      P57-8 (SG-5) or w5-5 - 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 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 P56 and P57 air conditioning amplifier assembly connectors.

    2. Disconnect the w5 front seat cushion pad with cover LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P56-17 (TSL) - w5-4 Always Below 1 Ω
      P56-17 (TSL) or w5-4 - Other terminals and body ground Always 10 kΩ or higher
      P57-8 (SG-5) - w5-5 Always Below 1 Ω
      P57-8 (SG-5) or w5-5 - 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