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СИСТЕМА ECD, Diagnostic DTC:P0095/23, P0097/23, P0098/23

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DTC Code DTC Name
P0095/23 Intake Air Temperature Sensor 2 Circuit
P0097/23 Intake Air Temperature Sensor 2 Circuit Low
P0098/23 Intake Air Temperature Sensor 2 Circuit High
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DESCRIPTION

The diesel turbo Intake Air Temperature (IAT) sensor is built into the charge air cooler and senses the IAT. A built-in thermistor of the sensor changes the resistance value according to the intake air temperature. The lower the IAT is the greater the thermistor resistance value becomes, and the higher the temperature is the lower the resistance value becomes (see Fig. 1).

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

DTC No. DTC Detection Condition Trouble Area
P0095/23

Open or short in diesel turbo IAT sensor circuit for 0.5 seconds

(1 trip detection logic)

  • Open or short in diesel turbo IAT sensor circuit

  • Diesel turbo IAT sensor

  • ECM
P0097/23

Short in diesel turbo IAT sensor circuit for 0.5 seconds

(sensor resistance value less than 25 Ω [sensor output voltage less than 0.05 V])

(1 trip detection logic)

  • Open or short in IAT sensor circuit

  • Diesel turbo IAT sensor

  • ECM
P0098/23

Open in diesel turbo IAT sensor circuit for 0.5 seconds

(sensor resistance value more than 156 kΩ [sensor output voltage more than 4.9 V])

(1 trip detection logic)

  • Open or short in IAT sensor circuit

  • Diesel turbo IAT sensor

  • ECM
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

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

Tip:

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

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

Note:

Before starting the diagnostic procedures, check if the intelligent tester Data List's "Intake Air Temp (Turbo)" is displayed. Enter the following the menus: Powertrain / Engine / Data List.

Result
Tester Displayed Proceed to
"Intake Air Temp (Turbo)" is displayed "When using intelligent tester" diagnostic procedures
"Intake Air Temp (Turbo)" is not displayed "When not using intelligent tester" diagnostic procedures
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When using intelligent tester:

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the intelligent tester ON.

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

    4. Read the value.

      OK
      Same value as the actual intake air temperature.
      Result
      Temperature Displayed Proceed to
      -40°C (-40°F) A
      140°C (284°F) or more B
      OK (same as air temperature near to intake manifold) C
      Tip:

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

      • If there is a short circuit, the intelligent tester indicates 140°C (284°F) or more.


  2. Click here

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


    1. A01BFH0E01

      Disconnect the D49 diesel turbo IAT sensor connector.

    2. Connect terminals 1 and 2 of the diesel turbo IAT sensor wire harness side connector.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch ON and turn the intelligent tester ON.

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

    6. Read the values.

      Standard
      140°C (284°F) or more.

    • NG :Click here
    • OK :CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE DIESEL TURBO INTAKE AIR TEMPERATURE SENSORClick here
  3. Click here

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


    1. A01BD7WE01

      Disconnect the D49 diesel turbo IAT sensor connector.

    2. Connect terminals THIA and E2 of the D1 ECM connector.

      Tip:

      Before checking, perform a visual and contact pressure check on the ECM connector.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch ON and turn the intelligent tester ON.

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

    6. Read the values.

      Standard
      140°C (284°F) or more.

    • NG :CONFIRM GOOD CONNECTION AT ECM. IF OK, REPLACE ECMClick here
    • OK :REPAIR OR REPLACE HARNESS AND CONNECTORClick here
  4. Click here

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


    1. A01BCZFE05

      Disconnect the D49 diesel turbo IAT sensor connector.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch ON and turn the intelligent tester ON.

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

    5. Read the values.

      Standard
      -40°C (-40°F) or more.

  5. Click here

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


    1. A01BHIKE01

      Disconnect the D49 diesel turbo IAT sensor connector.

    2. Disconnect the D1 ECM connector.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch ON and turn the intelligent tester ON.

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

    6. Read the values.

      Standard
      -40°C (-40°F) or more.

    • NG :REPLACE ECMClick here
    • OK :CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE DIESEL TURBO INTAKE AIR TEMPERATURE SENSORClick here
  6. Click here

    REPLACE ECM

  7. Click here

    ПРОВЕРЬТЕ, НЕТ ЛИ ЭПИЗОДИЧЕСКИХ НЕИСПРАВНОСТЕЙ

  8. Click here

    CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR

  9. Click here

    REPAIR OR REPLACE HARNESS AND CONNECTOR

  10. Click here

    CONFIRM GOOD CONNECTION AT ECM. IF OK, REPLACE ECM

  11. Click here

    REPLACE DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR

Click here

When not using intelligent tester:

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PROCEDURE


  1. Click here

    CHECK ECM TERMINAL VOLTAGE (THIA - E2 TERMINALS)


    1. A01BDTYE38

      Turn the ignition switch ON.

    2. Measure the voltage of the ECM connector.

      Standard voltage
      Tester Connection Condition Specified Condition
      D1-20 (THIA) - D1-28 (E2) 20°C (68°F) 0.5 to 3.4 V

    • NG :Click here
    • OK :ПРОВЕРЬТЕ, НЕТ ЛИ ЭПИЗОДИЧЕСКИХ НЕИСПРАВНОСТЕЙClick here
  2. Click here

    INSPECT DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR


    1. A01BDFIE02

      Remove the diesel turbo IAT sensor.

    2. Measure the resistance of the sensor.

      Standard resistance
      Connection Specified Condition
      20°C (68°F) 2.16 to 2.17 kΩ
      Note:

      If checking the IAT sensor in the water, keep the terminals dry. After the checking, wipe the sensor dry.


  3. Click here

    CHECK HARNESS AND CONNECTOR (ECM - DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR)


    1. A01BAJTE03

      Disconnect the D49 diesel turbo IAT sensor connector.

    2. Disconnect the D1 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      D1-20 (THIA) - D49-2 Below 1 Ω
      D1-28 (E2) - D49-1 Below 1 Ω
      D1-20 (THIA) or D49-2 - Body ground 10 kΩ or higher
      D1-28 (E2) or D49-1 - Body ground 10 kΩ or higher

  4. Click here

    REPLACE ECM

  5. Click here

    ПРОВЕРЬТЕ, НЕТ ЛИ ЭПИЗОДИЧЕСКИХ НЕИСПРАВНОСТЕЙ

  6. Click here

    REPLACE DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR

  7. Click here

    REPAIR OR REPLACE HARNESS AND CONNECTOR