Dtc B1417/17 Rear 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. 2 COOLER THERMISTOR)

INSPECT NO. 2 COOLER THERMISTOR

CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER)

CHECK NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (OPERATION)

CHECK FOR DTC

DTC B1417/17 Rear Evaporator Temperature Sensor Circuit


DESCRIPTION

The No. 2 cooler thermistor is installed on the evaporator in the rear air conditioning 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. 2 cooler thermistor changes in accordance with the cooled air temperature that has passed through the rear 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. 2 cooler thermistor and reads voltage changes as the resistance of the No. 2 cooler thermistor changes. This sensor is used for frost prevention.

DTC Code
DTC Detection Condition
Trouble Area
B1417/17
An open or short in the No. 2 cooler thermistor circuit.
  1. Harness or connector between No. 2 air conditioning harness assembly and air conditioning amplifier assembly
  2. No. 2 air conditioning harness assembly (No. 2 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 B1417/17 Rear Evaporator Temperature Sensor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (NO. 2 COOLER THERMISTOR)

  1. Use the Data List to check if the No. 2 cooler thermistor is functioning properly.

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Ambient Temp Sens (Rear)
    		No. 2 cooler thermistor /
    Min.: -29.7°C (-21.46°F)
    Max.: 59.55°C (139.19°F)
    		Actual rear 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. 2 COOLER THERMISTOR
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1417/17 Rear Evaporator Temperature Sensor Circuit

  1. Remove the No. 2 air conditioning harness assembly (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    7 (-) - 8 (+)
    		-10°C (14°F)
    		7.40 to 9.20 kΩ
    -5°C (23°F)
    		5.65 to 7.00 kΩ
    0°C (32°F)
    		4.35 to 5.40 kΩ
    5°C (41°F)
    		3.40 to 4.20 kΩ
    10°C (50°F)
    		2.68 to 3.30 kΩ
    15°C (59°F)
    		2.10 to 2.60 kΩ
    20°C (68°F)
    		1.66 to 2.10 kΩ
    25°C (77°F)
    		1.32 to 1.66 kΩ
    30°C (86°F)
    		1.05 to 1.35 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).


NG
REPLACE NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING HARNESS - AIR CONDITIONING AMPLIFIER)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1417/17 Rear Evaporator Temperature Sensor Circuit

  1. Disconnect the K19 No. 2 air conditioning harness connector.

  1. Disconnect the E35 amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K19-8 (+) - E35-17 (TEC)
    		Always
    		Below 1 Ω
    K19-7 (-) - E35-1 (SG)
    		Always
    		Below 1 Ω
    E35-17 (TEC) - Body ground
    		Always
    		10 kΩ or higher
    E35-1 (SG) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (OPERATION)

  1. Replace the No. 2 air conditioning harness assembly with a normal one and check that the condition returns to normal (Click here).


NEXT


5.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B1417 is not output.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

REPLACE NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (Click here)