ECD SYSTEM, Diagnostic DTC:P0095, P0097, P0098

DTC Code DTC Name
P0095 Intake Air Temperature Sensor 2 Circuit
P0097 Intake Air Temperature Sensor 2 Circuit Low
P0098 Intake Air Temperature Sensor 2 Circuit High

DESCRIPTION

The intake air temperature sensor (after turbocharged), mounted on the intake manifold, senses the turbocharged air temperature. A thermistor built into the sensor changes the resistance value according to the intake air temperature. The lower the intake air temperature is the greater the thermistor resistance value becomes, and the higher the intake air temperature is the lower the thermistor resistance value becomes (see Fig. 1).

The intake air temperature sensor is connected to the ECM. The 5 V power source voltage in the ECM is applied to the intake air temperature sensor from terminal THIA via resistor R. The resistor R and intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes in accordance with changes in the intake air temperature, the voltage at terminal THIA also changes. Based on this signal, the ECM increases the fuel injection volume to improve driveability during cold engine operation.

A01CIO4E01
P0095
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second Open or short in intake air temperature sensor (after turbocharged) circuit for 0.5 seconds (1 trip detection logic).

  • Open or short in intake air temperature sensor (after turbocharged) circuit

  • Intake air temperature sensor (after turbocharged)

  • ECM
P0097
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second Short in intake air temperature sensor (after turbocharged) circuit for 0.5 seconds (1 trip detection logic).

  • Open or short in intake air temperature sensor (after turbocharged) circuit

  • Intake air temperature sensor (after turbocharged)

  • ECM
P0098
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second Open in intake air temperature sensor (after turbocharged) circuit for 0.5 seconds (1 trip detection logic).

  • Open or short in intake air temperature sensor (after turbocharged) circuit

  • Intake air temperature sensor (after turbocharged)

  • ECM

Tech Tips

When any of these DTCs are set, check the intake air temperature by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / Intake Air Temp (Turbo).

Temperature Displayed Malfunction
-40°C (-40°F) Open circuit
190°C (374°F) or more Short circuit

WIRING DIAGRAM

A01CHPVE01

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips


  • If DTCs that are related to different systems are output simultaneously while terminal E2 is used as a ground terminal, terminal E2 may have an open circuit.

  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

PROCEDURE


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


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air Temp (Turbo).

    6. Read the value.

      Standard
      Same value as the actual inlet air temperature.
      Result
      Temperature Display Proceed to
      -40°C (-40°F) A
      190°C (374°F) or more B
      OK (same as air temperature near intake manifold) C

      Tech Tips


      • If there is an open circuit, the intelligent tester indicates -40°C (-40°F).

      • If there is a short circuit, the intelligent tester indicates 190°C (374°F) or more.


    B

    READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS) Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

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


    1. A01CIJ3E03
      Text in Illustration
      *1 Intake Air Temperature Sensor
      *2 ECM
      *a

      Front view of wire harness connector

      (to Intake Air Temperature Sensor)

      Disconnect the intake air temperature sensor connector.

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

    3. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    4. Connect the intelligent tester to the DLC3.

    5. Turn the ignition switch to ON.

    6. Turn the tester on.

    7. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air Temp (Turbo).

    8. Read the value.

      Standard
      190°C (374°F) or more

    9. Reconnect the intake air temperature sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (INTAKE AIR TEMPERATURE SENSOR - ECM) Click here

    OK

    REPLACE INTAKE AIR TEMPERATURE SENSOR Click here

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


    1. Disconnect the ECM connector.

    2. Disconnect the intake air temperature sensor connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      E35-8 (THIA) - I22-2 Always Below 1 Ω
      E36-14 (E2) - I22-1 Always Below 1 Ω

    4. Reconnect the intake air temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INTAKE AIR TEMPERATURE SENSOR - ECM)

    OK

    REPLACE ECM Click here

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


    1. A01CGN4E28
      Text in Illustration
      *1 Intake Air Temperature Sensor
      *2 ECM

      Disconnect the intake air temperature sensor connector.

    2. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air Temp (Turbo).

    7. Read the value.

      Standard
      -40°C (-40°F)

    8. Reconnect the intake air temperature sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (INTAKE AIR TEMPERATURE SENSOR - ECM) Click here

    OK

    REPLACE INTAKE AIR TEMPERATURE SENSOR Click here

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


    1. Disconnect the ECM connector.

    2. Disconnect the intake air temperature sensor connector.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E35-8 (THIA) or I22-2 - Body ground Always 10 kΩ or higher
      E36-14 (E2) or I22-1 - Body ground Always 10 kΩ or higher

    4. Reconnect the intake air temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INTAKE AIR TEMPERATURE SENSOR - ECM)

    OK

    REPLACE ECM Click here