Dtc B1413/13 Evaporator 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 INTELLIGENT TESTER (NO. 1 COOLER THERMISTOR)

INSPECT NO. 1 COOLER THERMISTOR

DTC B1413/13 Evaporator Temperature Sensor Circuit


DESCRIPTION

The No. 1 cooler thermistor is installed on the evaporator in the air conditioner unit to detect the cooled air temperature that has passed through the evaporator and control the air conditioning. It sends appropriate signals to the air conditioning amplifier assembly. The resistance of the No. 1 cooler thermistor changes in accordance with the cooled air temperature that has passed through the evaporator. 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 No. 1 cooler thermistor and reads voltage changes as the resistance of the No. 1 cooler thermistor changes. This sensor is used for frost prevention.

DTC Code
DTC Detection Condition
Trouble Area
B1413/13
An open or short in the No. 1 cooler thermistor circuit.
  1. No. 1 cooler thermistor
  2. Air conditioning harness assembly (No. 1 cooler thermistor)
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1413/13 Evaporator Temperature Sensor Circuit


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1413/13 Evaporator Temperature Sensor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (NO. 1 COOLER THERMISTOR)

  1. Use the Data List to check if the No. 1 cooler thermistor is functioning properly.

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Evaporator Fin Thermistor
    		No. 1 cooler thermistor /
    Min.: -29.7°C (-21.46°F)
    Max.: 59.55°C (139.19°F)
    		Actual evaporator temperature displayed
    		Open in the circuit: -29.7°C (-21.46°F).
    Short in the circuit: 59.55°C (139.19°F).
    OK:
    The display is as specified in the normal condition.


NG
Go to step 2
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

2.INSPECT NO. 1 COOLER THERMISTOR
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1413/13 Evaporator Temperature Sensor Circuit

  1. Remove the No. 1 cooler thermistor.

    1. for LHD (Click here)
    2. for RHD (Click here)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 (+) - 2 (-)
    		-10°C (14°F)
    		7.30 to 9.10 kΩ
    -5°C (23°F)
    		5.65 to 6.95 kΩ
    0°C (32°F)
    		4.40 to 5.35 kΩ
    5°C (41°F)
    		3.40 to 4.15 kΩ
    10°C (50°F)
    		2.70 to 3.25 kΩ
    15°C (59°F)
    		2.14 to 2.58 kΩ
    20°C (68°F)
    		1.71 to 2.05 kΩ
    25°C (77°F)
    		1.38 to 1.64 kΩ
    30°C (86°F)
    		1.11 to 1.32 kΩ
    NOTICE:
    1. Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.
    2. When measuring, the sensor temperature must be the same as the ambient temperature.
    HINT:
    As the temperature increases, the resistance decreases (see the graph).
    Result
    Result
    		Proceed to
    OK (for LHD)
    		A
    OK (for RHD)
    		B
    NG (for LHD)
    		C
    NG (for RHD)
    		D


B
REPLACE AIR CONDITIONING HARNESS ASSEMBLY (Click here)

C
REPLACE NO. 1 COOLER THERMISTOR (Click here)

D
REPLACE NO. 1 COOLER THERMISTOR (Click here)
A

REPLACE AIR CONDITIONING HARNESS ASSEMBLY (Click here)