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 GTS (AMBIENT TEMP SENS [REAR])

INSPECT NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (EVAPORATOR TEMPERATURE SENSOR)

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

CHECK NO. 2 AIR CONDITIONING HARNESS ASSEMBLY

DTC B1417/17 Rear Evaporator Temperature Sensor Circuit


DESCRIPTION

The No. 2 cooler thermistor (room temperature sensor) 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 (room temperature sensor) 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 (room temperature sensor) and reads voltage changes as the resistance of the No. 2 cooler thermistor (room temperature sensor) 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 (room temperature sensor) circuit.
  1. Harness or connector
  2. No. 2 air conditioning harness assembly (No. 2 cooler thermistor [room temperature sensor])
  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 GTS (AMBIENT TEMP SENS [REAR])

  1. Use the Data List to check if the No. 2 cooler thermistor (room temperature sensor) is functioning properly (Click here).

    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
    		No. 2 air conditioning harness assembly (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 AMPLIFIER ASSEMBLY (Click here)

2.INSPECT NO. 2 AIR CONDITIONING HARNESS ASSEMBLY (EVAPORATOR TEMPERATURE SENSOR)

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

  1. Inspect the No. 2 air conditioning harness assembly (evaporator temperature sensor) (Click here).



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


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

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

  1. Disconnect the E35 air conditioning amplifier assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K19-8 (+) - E35-11 (TEC)
    		Always
    		Below 1 Ω
    K19-7 (-) - E35-33 (SG)
    		Always
    		Below 1 Ω
    K19-7 (-) - K19-8 (+)
    		Always
    		10 kΩ or higher
    K19-8 (+) or E35-11 (TEC)- Body ground
    		Always
    		10 kΩ or higher
    K19-7 (-) or E35-33 (SG) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK NO. 2 AIR CONDITIONING HARNESS ASSEMBLY

  1. Replace the No. 2 air conditioning harness assembly with a new or known good one (Click here).

  1. When troubleshooting according to the DTC:

    1. Clear the DTCs (Click here).

    2. Check for DTCs (Click here).

      OK:
      DC B1417/17 is not output.

  1. When troubleshooting according to Problem Symptoms Table:

    1. Check the air conditioning control system operates normally.

      OK:
      Air conditioning control system operation returns to normal.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

END (NO. 2 AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE)