Dtc B1411/11 Room Temperature Sensor Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (ROOM TEMPERATURE SENSOR)

INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

CHECK HARNESS AND CONNECTOR (COOLER THERMISTOR [ROOM TEMPERATURE SENSOR] - AIR CONDITIONING AMPLIFIER ASSEMBLY)

DTC B1411/11 Room Temperature Sensor Circuit


DESCRIPTION

The front room temperature sensor for the front seat is installed in the instrument panel to detect the room temperature and control the heater and air conditioner "auto" mode. The resistance of the room temperature sensor changes in accordance with the front room temperature. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.
The air conditioning amplifier assembly applies voltage (5 V) to the front room temperature sensor and reads voltage changes as the resistance of the front room temperature sensor changes. This sensor also sends the appropriate signals to the air conditioning amplifier assembly.

DTC Code
DTC Detection Condition
Trouble Area
B1411/11
An open or short in the front room temperature sensor circuit.
  1. Cooler thermistor (room temperature sensor)
  2. Harness or connector
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


w/ Rear Heater:

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit


w/o Rear Heater:

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING GTS (ROOM TEMPERATURE SENSOR)

  1. Use the Data List to check if the cooler thermistor (room temperature sensor) is functioning properly (Click here).

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Room Temperature Sensor
    		Cooler thermistor (room temperature sensor) / Min.: -6.5°C (20.3°F), Max.: 57.25°C (135.05°F)
    		Actual room temperature for front seat displayed
    		Cooler thermistor (room temperature sensor) system malfunction:
    1. pen in the circuit: -6.5°C (20.3°F)O
    2. Short in the circuit: 57.25°C (135.05°F)
    OK:
    The display is as specified in the normal condition.
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to the DTC)
    		A
    OK (When troubleshooting according to Problem Symptoms Table)
    		B
    NG
    		C


B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

C
Go to step 2
A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

2.INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)

  1. Remove the cooler thermistor (room temperature sensor) (Click here).

  1. Inspect the cooler thermistor (room temperature sensor) (Click here).



NG
REPLACE COOLER THERMISTOR (ROOM TEMPERATURE SENSOR) (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (COOLER THERMISTOR [ROOM TEMPERATURE SENSOR] - AIR CONDITIONING AMPLIFIER ASSEMBLY)

  1. w/ Rear Heater:

    1. Disconnect the E32 cooler thermistor (room temperature sensor) connector.

    2. Disconnect the E35 air conditioning amplifier assembly connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E32-1 - E35-16 (TR)
      		Always
      		Below 1 Ω
      E32-2 - E35-1 (SG-1)
      		Always
      		Below 1 Ω
      E32-1 - E32-2
      		Always
      		10 kΩ or higher
      E32-1 or E35-16 (TR) - Body ground
      		Always
      		10 kΩ or higher
      E32-2 or E35-1 (SG-1) - Body ground
      		Always
      		Below 1 Ω

  1. w/o Rear Heater:

    1. Disconnect the E32 cooler thermistor (room temperature sensor) connector.

    2. Disconnect the E165 air conditioning amplifier assembly connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E32-1 - E165-4 (TR)
      		Always
      		Below 1 Ω
      E32-2 - E165-8 (SG-1)
      		Always
      		Below 1 Ω
      E32-1 - E32-2
      		Always
      		10 kΩ or higher
      E32-1 or E165-4 (TR) - Body ground
      		Always
      		10 kΩ or higher
      E32-2 or E165-8 (SG-1) - Body ground
      		Always
      		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)