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Home >> Toyota >> 2004 >> Matrix Base, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (SFI) - Diagnostics (1ZZ-FE) >> DTC P0110: Intake Air Temperature Circuit, DTC P0112: Intake Air Temperature Circuit Low Input, DTC P0113: Intake Air Temperature Circuit High Input >> Inspection Procedure
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Inspection Procedure

NOTE:
  • If different DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may be open.
  • Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.
  1. READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(INTAKE AIR TEMPERATURE) 
    1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
    3. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / INTAKE AIR" and read its value displayed on the hand-held tester or the OBD II scan tool.

      Temperature: Same value as the actual intake air temperature. 

      Result: 

      DESCRIPTION

      Temperature Displayed Proceed to
      -40°C (-40°F) A
      140°C (284°F) or more B
      OK (Same as air temperature near to the intake) C
      NOTE:
      • If there is an open circuit, the hand-held tester or the OBD II scan tool indicates -40°C (-40°F).
      • If there is a short circuit, the hand-held tester or the OBD II scan tool indicates 140°C (284°F) or more.
    1. B: Go to step   4 
    2. C: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS  ) 
    3. A: Go to next step. 
  2. READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(CHECK FOR OPEN IN WIRE HARNESS) 
    1. Disconnect the M1 mass air flow sensor connector.
    2. Connect terminals THA and E2 of the mass air flow sensor wire harness side connector.
    3. Turn the ignition switch ON.
    4. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / INTAKE AIR" and read its value displayed on the hand-held tester or the OBD II scan tool.

      Temperature value: 140°C (284°F) or more 

    5. Reconnect the mass air flow sensor connector.
      Fig 1: Connecting Terminals THA & E2 Or Mass Air Flow Sensor Wire Harness Side Connector
      G02914491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Identifying M1 Mass Air Flow Sensor Connector Terminals
      G02914492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: CONFIRM GOOD CONNECTION AT SENSOR. IF OK, REPLACE MASS AIR FLOW SENSOR 
    2. NG: Go to next step. 
  3. READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(CHECK FOR OPEN IN ECM) 
    1. Disconnect the M1 mass air flow sensor connector.
    2. Connect the terminals THA and E2 of the E3 ECM connector.
      NOTE:

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

    3. Turn the ignition switch ON.
    4. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / INTAKE AIR" and read its value displayed on the hand-held tester or the OBD II scan tool.

      Temperature value: 140°C (284°F) or more 

      Fig 3: Connecting Terminals THA & E2 Of E3 ECM Connector
      G02914493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Reconnect the mass air flow sensor connector.
      Fig 4: Identifying E3 ECM Connector Terminals
      G02914494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. NG: CONFIRM GOOD CONNECTION AT ECM. IF OK, REPLACE ECM (See  REPLACEMENT  ) 
  4. READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(CHECK FOR SHORT IN WIRE HARNESS) 
    1. Disconnect the M1 mass air flow sensor connector.
    2. Turn the ignition switch ON.
    3. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / INTAKE AIR" and read its value displayed on the hand-held tester or the OBD II scan tool.

      Temperature value: -40°C (-40°F) 

    4. Reconnect the mass air flow sensor connector.
      Fig 5: Disconnecting M1 Mass Air Flow Sensor Connector Terminals
      G02914495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE MASS AIR FLOW SENSOR 
    2. NG: Go to next step. 
  5. READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL(CHECK FOR SHORT IN ECM) 
    1. Disconnect the E3 ECM connector.
    2. Turn the ignition switch ON.
    3. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / INTAKE AIR" and read its value displayed on the hand-held tester or the OBD II scan tool.

      Temperature value: -40°C (-40°F) 

    4. Reconnect the ECM connector.
      Fig 6: Identifying E3 ECM Connector Terminals
      G02914496Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 7: Identifying E3 ECM Connector Terminals
      G02914497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. NG: REPLACE ECM (See  REPLACEMENT  ) 
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