Dtc B14C1 Front Left Seat Heat Sensor Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Seat. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

READ VALUE USING GTS (FL SEAT HEATER TEMPERATURE)

INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY LH

INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - SEAT HEATER CONTROL SUB-ASSEMBLY LH)

DTC B14C1 Front Left Seat Heat Sensor Circuit


DESCRIPTION

Output to the front seat cushion heater assembly LH 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
B14C1
Seat heater temperature sensor malfunction
  1. Air conditioning amplifier assembly
  2. Front seat cushion heater assembly LH
  3. Seat heater control sub-assembly LH
  4. Wire harness or connector

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Seat.Front Power Seat Control System (W/ Seat Position Memory System). Dtc B14C1 Front Left Seat Heat Sensor Circuit


INSPECTION PROCEDURE

1.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (Click here).

    OK:
    DTC B14C1 is not output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (Click here)

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

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

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

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

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


NG
Go to step 4
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

4.INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY LH

  1. Remove the front seat cushion heater assembly LH (Click here).

  1. Inspect the front seat cushion heater assembly LH (Click here).



NG
REPLACE FRONT SEAT CUSHION HEATER ASSEMBLY LH (Click here)
OK


5.INSPECT SEAT HEATER CONTROL SUB-ASSEMBLY LH


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Seat.Front Power Seat Control System (W/ Seat Position Memory System). Dtc B14C1 Front Left Seat Heat Sensor Circuit

  1. Remove the seat heater control sub-assembly LH connector (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    c13-5 (THL) - SHL-2 (TH1)
    		Always
    		Below 1 Ω
    c13-2 (PL) - SHL-3 (TH2)
    		Always
    		Below 1 Ω
    c13-5 (THL) or SHL-2 (TH1) - Body ground
    		Always
    		10 kΩ or higher
    c13-2 (PL) or SHL-3 (TH2) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *a
    		Seat Heater Control Sub-assembly LH
    (to Air Conditioning Amplifier Assembly)
    *b
    		Seat Heater Control Sub-assembly LH
    (to Front Seat Cushion Heater Assembly LH)


NG
REPLACE SEAT HEATER CONTROL SUB-ASSEMBLY LH (Click here)
OK


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

  1. Disconnect the E35 air conditioning amplifier assembly connector.

  1. Disconnect the c13 seat heater control sub-assembly LH connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    c13-5 (THL) - E35-19 (TSL)
    		Always
    		Below 1 Ω
    c13-5 (THL) or E35-19 (TSL) - Body ground
    		Always
    		10 kΩ or higher
    c13-2 (PL) - E35-34 (SG-4)
    		Always
    		Below 1 Ω
    c13-2 (PL) or SHL-3 (TH2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)