DTC    24    Air Temperature Circuit Malfunction

для подготовки Нажмите здесь


DESCRIPTION

The intake air temperature sensor senses the intake air temperature. A thermistor built into this sensor changes its resistance according to the intake air temperature as shown in the illustration. The resistance value of the intake air temperature sensor is one of the factors used to determine the fuel injection volume.
A009675E07

DTC No.
DTC Detection Condition
Trouble Area
24
Open or short in the intake air temperature sensor circuit for 0.5 sec. or more.
  1. Open or short in intake air temperature sensor circuit
  2. Intake air temperature sensor
  3. ECM

WIRING DIAGRAM


A009C02E01


INSPECTION PROCEDURE

УКАЗАНИЕ:
  1. If DTCs related to different systems that have terminal E2 as the ground terminal are stored simultaneously, there may be an open circuit between terminal E2 and body ground.
  2. Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.


When using intelligent tester:

1.READ VALUE USING INTELLIGENT TESTER (INTAKE AIR TEMPERATURE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
    Result 
    Result
    		Proceed to
    -40°C (-40°F)
    		A
    140°C (284°F) or higher
    		B
    Value is same as actual engine coolant temperature
    		C

    УКАЗАНИЕ:
    When DTC 24 is stored, the type of malfunction can be determined based on the intake air temperature (see below).
    Temperature Displayed
    		Malfunction
    -40°C (-40°F)
    		Open circuit
    140°C (284°F) or higher
    		Short circuit



B
Перейдите к шагу 4

C
CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)
A


2.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)


    A0099BIE07

  1. Disconnect the intake air temperature sensor connector.

  1. Connect terminals 1 and 2 of the intake air temperature sensor harness side connector.

  1. Turn the ignition switch to ON.

  1. Read the temperature value on the intelligent tester.

    OK:
    140°C (284°F) or higher

    Text in Illustration 
    *1
    		Intake Air Temperature Sensor
    *2
    		ECM
    *a
    		Front view of wire harness connector
    (to Intake Air Temperature Sensor)

  1. Reconnect the intake air temperature sensor connector.



NG
Перейдите к шагу 3
OK

REPLACE INTAKE AIR TEMPERATURE SENSOR (Нажмите здесь)  

3.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN ECM)


    A009APXE17

  1. Connect terminals THA and E2 of the ECM connector.

  1. Turn the ignition switch to ON.

  1. Read the temperature value on the intelligent tester.

    OK:
    140°C (284°F) or higher

    Text in Illustration 
    *1
    		Intake Air Temperature Sensor
    *2
    		ECM
    *a
    		Component with harness connected
    (ECM)



NG
REPLACE ECM (Нажмите здесь)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR 

4.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)


    A00992KE25

  1. Disconnect the intake air temperature sensor connector.

  1. Turn the ignition switch to ON.

  1. Read the temperature value on the intelligent tester.

    OK:
    -40°C (-40°F)

    Text in Illustration 
    *1
    		Intake Air Temperature Sensor
    *2
    		ECM

  1. Reconnect the intake air temperature sensor connector.



NG
Перейдите к шагу 5
OK

REPLACE INTAKE AIR TEMPERATURE SENSOR (Нажмите здесь)  

5.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN ECM)


    A0096JUE14

  1. Disconnect the ECM connector.

  1. Turn the ignition switch to ON.

  1. Read the temperature value on the intelligent tester.

    OK:
    -40°C (-40°F)

    Text in Illustration 
    *1
    		Intake Air Temperature Sensor
    *2
    		ECM
    *a
    		Rear view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.



NG
REPLACE ECM (Нажмите здесь)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR 


When not using intelligent tester:

1.CHECK ECM


    A009AF3E91

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    C102-3 (THA) - C102-9 (E2)
    		20°C (68°F)
    		0.2 to 3.8 V
    C102-3 (THA) - C102-9 (E2)
    		80°C (176°F)
    		0.1 to 1.5 V

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)



NG
Перейдите к шагу 2
OK

CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)  

2.INSPECT INTAKE AIR TEMPERATURE SENSOR

  1. Inspect the intake air temperature sensor (See page Нажмите здесь).



NG
REPLACE INTAKE AIR TEMPERATURE SENSOR (Нажмите здесь)
OK


3.CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR TEMPERATURE SENSOR)

  1. Disconnect the intake air temperature sensor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C104-2 - C102-3 (THA)
    		Always
    		Below 1 Ω
    C104 - C102-9 (E2)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C104-2 or C102-3 (THA) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the intake air temperature sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Нажмите здесь)