СИСТЕМА SFI, Diagnostic DTC:P0112, P0113

DTC Code DTC Name
P0112 Intake Air Temperature Circuit Low Input
P0113 Intake Air Temperature Circuit High Input

DESCRIPTION

A004Y0VE01

DTC No. DTC Detection Condition Trouble Area
P0112

Short in intake air temperature sensor circuit for 0.5 seconds

(1 trip detection logic).


  • Short in intake air temperature sensor circuit

  • Intake air temperature sensor (built into mass air flow meter sub-assembly)

  • ECM

P0113

Open in intake air temperature sensor circuit for 0.5 seconds

(1 trip detection logic).


  • Open in intake air temperature sensor circuit

  • Intake air temperature sensor (built into mass air flow meter sub-assembly)

  • ECM

Tech Tips

When any of these DTCs are set, check the intake air temperature by entering the following menus: Powertrain / Engine and ECT / Data List / All Data / Intake Air.

Temperature Displayed Malfunction
-40°C (-40°F) Open circuit
140°C (284°F) Short circuit

MONITOR DESCRIPTION

The ECM monitors the sensor voltage and uses this value to calculate the intake air temperature. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the intake air temperature sensor circuit and stores a DTC.

Example:

If the sensor output voltage is higher than 4.91 V for 0.5 seconds or more, the ECM determines that there is an open in the intake air temperature sensor circuit, and stores DTC P0113. Conversely, if the output voltage is less than 0.18 V for 0.5 seconds or more, the ECM determines that there is a short in the sensor circuit, and stores DTC P0112.

MONITOR STRATEGY

Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the intelligent tester to the DLC3.

  2. Turn the power switch on (IG) and turn the tester on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for at least 30 seconds.

  5. Turn the power switch on (IG) and turn the tester on.

  6. Wait 0.5 seconds or more.

  7. Enter the following menus: Powertrain / Engine and ECT / DTC.

  8. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  10. Input the DTC: P0112 or P0113.

  11. Check the DTC judgment result.

    Tester Display Description
    NORMAL
    • DTC judgment completed

    • System normal

    ABNORMAL
    • DTC judgment completed

    • System abnormal

    INCOMPLETE
    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

A004VF7E08
*a Intake Air Temperature Sensor (Built into Mass Air Flow Meter Sub-assembly)

CAUTION / NOTICE / HINT

Tech Tips

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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (INTAKE AIR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Intake Air.

    5. Read the value displayed on the tester.

      OK
      Same as actual intake air temperature.
      Result
      Result Proceed to
      -40°C (-40°F) A
      140°C (284°F) B
      Same as actual intake air temperature C

      Tech Tips


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


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


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


    1. Disconnect the mass air flow meter sub-assembly connector.

      A004YOAE01
      Text in Illustration
      *1 Mass Air Flow Meter Sub-assembly *2 ECM
      *a

      Front view of wire harness connector

      (to Mass Air Flow Meter Sub-assembly)

      - -
    2. Connect terminals 1 (THA) and 2 (E2) of the mass air flow meter sub-assembly connector on the wire harness side.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the power switch on (IG).

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Intake Air.

    7. Read the value displayed on the tester.

      Standard Value
      140°C (284°F)

    OK
    NG
  3. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D5-1 (THA) - D27-116 (THA) Always Below 1 Ω
      D5-2 (E2) - D27-93 (ETHA) Always Below 1 Ω

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


    1. A004YC8E01
      Text in Illustration
      *1 Mass Air Flow Meter Sub-assembly
      *2 ECM

      Disconnect the mass air flow meter sub-assembly connector.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Intake Air.

    6. Read the value displayed on the tester.

      Standard Value
      -40°C (-40°F)

    OK
    NG
  5. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D5-1 (THA) or D27-116 (THA) - Body ground Always 10 kΩ or higher

    OK
    NG