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 GTS (EVAPORATOR FIN THERMISTOR)

INSPECT NO. 1 COOLER THERMISTOR (EVAPORATOR TEMPERATURE SENSOR)

CHECK AIR CONDITIONING HARNESS ASSEMBLY

DTC B1413/13 Evaporator Temperature Sensor Circuit


DESCRIPTION

The No. 1 cooler thermistor (evaporator temperature sensor) 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 (evaporator temperature sensor) 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 (evaporator temperature sensor) and reads voltage changes as the resistance of the No. 1 cooler thermistor (evaporator temperature sensor) 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 (evaporator temperature sensor) circuit.
  1. No. 1 cooler thermistor (evaporator temperature sensor)
  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


INSPECTION PROCEDURE

1.READ VALUE USING GTS (EVAPORATOR FIN THERMISTOR)

  1. Use the Data List to check if the No. 1 cooler thermistor (evaporator temperature sensor) is functioning properly (Click here)

    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
    		No. 1 cooler thermistor (evaporator temperature sensor) system malfunction:
    1. Open in the circuit: -29.7°C (-21.46°F)
    2. Short in the circuit: 59.55°C (139.19°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 HARNESS ASSEMBLY (Click here)

2.INSPECT NO. 1 COOLER THERMISTOR (EVAPORATOR TEMPERATURE SENSOR)

  1. Remove the No. 1 cooler thermistor (evaporator temperature sensor).

    1. for LHD: Click here
    2. for RHD: Click here

  1. Inspect the No. 1 cooler thermistor (evaporator temperature sensor).

    1. for LHD: Click here
    2. for RHD: Click here
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE NO. 1 COOLER THERMISTOR (EVAPORATOR TEMPERATURE SENSOR) (Click here)

C
REPLACE NO. 1 COOLER THERMISTOR (EVAPORATOR TEMPERATURE SENSOR) (Click here)
A


3.CHECK AIR CONDITIONING HARNESS ASSEMBLY


    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 air conditioning harness assembly.

    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 - z71-5 (SG)
    		Always
    		Below 1 Ω
    2 - z71-6 (TE)
    		Always
    		Below 1 Ω
    1 - 2
    		Always
    		10 kΩ or higher
    1 or z71-5 (SG) - Body ground
    		Always
    		10 kΩ or higher
    2 or z71-6 (TE) - Body ground
    		Always
    		10 kΩ or higher
Text in Illustration
*a
Air Conditioning Harness Assembly
*b
to No. 1 Cooler Thermistor (Evaporator Temperature Sensor) Connector
*c
Front view of air conditioning harness assembly
(to No. 1 Cooler Thermistor [Evaporator Temperature Sensor])
*d
Front view of air conditioning harness assembly
(to Air Conditioning Amplifier Assembly)
Result
Result
Proceed to
OK
A
NG (for LHD)
B
NG (for RHD)
C


B
REPLACE AIR CONDITIONING HARNESS ASSEMBLY (Click here)

C
REPLACE AIR CONDITIONING HARNESS ASSEMBLY (Click here)
A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)