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Home >> Toyota >> 2014 >> Prius Four >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 53 (Engine Control System (Diagnostic Code (P0010 - P0300)) - PRIUS (Plug-In)) >> SFI System >> DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input [10/2013 - ] >> Procedure
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DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input [10/2013 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING TECHSTREAM (INTAKE AIR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Intake Air.
    5. Read the value displayed on the Techstream.

      OK

      Same as actual intake air temperature.

      RESULT

      Result Proceed to
      -40°C (-40°F) A
      Higher than 128°C (262°F) B
      Same as actual intake air temperature C

      HINT: 

      • If there is an open circuit, the Techstream indicates -40°C (-40°F).
      • If there is a short circuit, the Techstream indicates higher than 128°C (262°F).

    B → See step   4 

    C → See step   6 

    A: Go to next step 

  2. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) 
    1. Disconnect the mass air flow meter sub-assembly connector.
      GTY342281Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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 Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Turn the Techstream on.
    6. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Intake Air.
    7. Read the value displayed on the Techstream.

      Standard value

      Higher than 128°C (262°F)

      HINT: 

      Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly. Refer to INITIALIZATION [10/2013 - ] .

    NG → See step   3 

    OK → See step   7 

  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) - D28-116 (THA) Always Below 1 Ω
      D5-2 (E2) - D28-93 (ETHA) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   8 

  4. READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) 
    1. Disconnect the mass air flow meter sub-assembly connector.
      GTY316078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Mass Air Flow Meter Sub-assembly
      *2 ECM
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Intake Air.
    6. Read the value displayed on the Techstream.

      Standard value

      -40°C (-40°F)

      HINT: 

      Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly. Refer to INITIALIZATION [10/2013 - ] .

    NG → See step   5 

    OK → See step   9 

  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 D28-116 (THA) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   10 

  6. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [10/2013 - ] 
  7. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to  REMOVAL [10/2013 - ] 
  8. REPLACE ECM. Refer to  REMOVAL [10/2013 - ] 
  9. REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to  REMOVAL [10/2013 - ] 
  10. REPLACE ECM. Refer to  REMOVAL [10/2013 - ] 
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