Dtc B1411/11 Room Temperature Sensor Circuit

Vehicle Interior. Corolla. Zre142 Aze141
Heating Air Conditioning. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

INSPECT ROOM TEMPERATURE SENSOR

CHECK HARNESS AND CONNECTOR (ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER)

DTC B1411/11 Room Temperature Sensor Circuit


DESCRIPTION

This sensor detects the cabin temperature that is used as the basis for temperature control and sends a signal to the A/C amplifier.

DTC No.
DTC Detection Condition
Trouble Area
B1411/11
Open or short in room temperature sensor circuit
  1. Room temperature sensor
  2. Harness or connector between room temperature sensor and A/C amplifier
  3. A/C amplifier

WIRING DIAGRAM


Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Air Conditioner / Data List.

  1. Check the value(s) by referring to the table below.

    Air Conditioner
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Room Temperature Sensor
    (Room Temp)
    		Room temperature sensor / Min.: -6.5°C (20.3°F), Max.: 57.25°C (135.05°F)
    		Actual cabin temperature displayed
    		-
    OK:
    The display is as specified in the "Normal Condition" column.

    Result:

    Result
    		Proceed to
    NG
    		A
    OK (When troubleshooting according to Problem Symptoms Table)
    		B
    OK (When troubleshooting according to DTC)
    		C


B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (COROLLA_ZRE142 RM000001M2W05OX.html)

C
REPLACE AIR CONDITIONING AMPLIFIER (COROLLA_ZRE142 RM000002XMC01VX.html)
A


2.INSPECT ROOM TEMPERATURE SENSOR

  1. Remove the room temperature sensor.



    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1411/11 Room Temperature Sensor Circuit

  1. Disconnect the connector from the room temperature sensor.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E25-1 - E25-2
    		10°C (50°F)
    		3.00 to 3.73 kΩ
    E25-1 - E25-2
    		15°C (59°F)
    		2.45 to 2.88 kΩ
    E25-1 - E25-2
    		20°C (68°F)
    		1.95 to 2.30 kΩ
    E25-1 - E25-2
    		25°C (77°F)
    		1.60 to 1.80 kΩ
    E25-1 - E25-2
    		30°C (86°F)
    		1.28 to 1.47 kΩ
    E25-1 - E25-2
    		35°C (95°F)
    		1.00 to 1.22 kΩ
    E25-1 - E25-2
    		40°C (104°F)
    		0.80 to 1.00 kΩ
    E25-1 - E25-2
    		45°C (113°F)
    		0.65 to 0.85 kΩ
    E25-1 - E25-2
    		50°C (122°F)
    		0.50 to 0.70 kΩ
    E25-1 - E25-2
    		55°C (131°F)
    		0.44 to 0.60 kΩ
    E25-1 - E25-2
    		60°C (140°F)
    		0.36 to 0.50 kΩ
    NOTICE:
    1. Hold the sensor only by its connector. Touching the sensor may change the resistance value.
    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).
    Text in Illustration
    *a
    		Component without harness connected
    (Room Temperature Sensor)
    *b
    		Sensing Portion
    *c
    		Resistance (kΩ)
    *d
    		Allowable Range
    *e
    		Temperature (°C (°F))


NG
REPLACE ROOM TEMPERATURE SENSOR (COROLLA_ZRE142 RM000002XMT01HX.html)
OK


3.CHECK HARNESS AND CONNECTOR (ROOM TEMPERATURE SENSOR - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the connector from the A/C amplifier.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E30-29 (TR) - E25-1
    		Always
    		Below 1 Ω
    E30-34 (SG-1) - E25-2
    		Always
    		Below 1 Ω
    E30-29 (TR) - Body ground
    		Always
    		10 kΩ or higher
    E30-34 (SG-1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER (COROLLA_ZRE142 RM000002XMC01VX.html)