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Inspection [08/2018 - ]: Procedure

  1. INSPECT INTAKE AIR TEMPERATURE SENSOR 
    1. IAT Sensor No. 1 Resistance inspection (5 pin Type)

      HINT: 

      Because the IAT sensor No. 1 is integrated in the MAF sensor, replacing the IAT sensor No. 1 includes replacement of the MAF sensor/IAT sensor No. 1.

      1. Disconnect the negative battery cable.

        Refer to REMOVAL [07/2015 - ]

      2. Disconnect the MAF sensor/IAT sensor No. 1 connector.
      3. Measure the resistance between MAF sensor/IAT sensor No. 1 terminals 1 and 2.

        If not as specified, replace the MAF sensor/IAT sensor No. 1.

        Refer to REMOVAL [07/2015 - ] 

        GTY484954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        SPECIFICATION (REFERENCE)

        IAT (°C (°F)) Resistance (Kilohms)
        -20 (-4) 13.7 to 16.6
        20 (68) 2.49 to 2.79
        60 (140) 0.622 to 0.703
        GTY485324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Resistance (Kilohms)
        *b IAT (°C (°F))
        *c 13.7 to 16.6
        *d 2.49 to 2.79
        *e 0.622 to 0.703
    2. IAT Sensor No. 1 Function inspection (3 pin Type)

      HINT: 

      Because the IAT sensor No. 1 is integrated in the MAF sensor, replacing the IAT sensor No. 1 includes replacement of the MAF sensor/IAT sensor No. 1.

      1. Connect the Techstream to the DLC-2.
      2. Switch the ignition ON (engine off).
      3. Display the PID IAT.

        Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

        Refer to INSPECTION [08/2018 - ] 

      4. Compare the voltage and temperature indications for the PID IAT with the standard in the table indicated below.

        If they do not match the standard, replace the MAF sensor /IAT sensor No. 1.

        Refer to REMOVAL [07/2015 - ] 

        STANDARD

        IAT
        V °C (°F)
        Approx. 2.70 20 (68)
        Approx. 1.80 40 (104)
        Approx. 1.20 60 (140)
    3. IAT Sensor No. 2 Resistance inspection

      HINT: 

      Because the IAT sensor No. 2 is integrated in the MAP sensor, replacing the IAT sensor No. 2 includes replacement of the MAP sensor/IAT sensor No. 2.

      1. Disconnect the negative battery cable.

        Refer to REMOVAL [07/2015 - ]

      2. Remove the MAP sensor/IAT sensor No. 2.

        Refer to REMOVAL [07/2015 - ] 

      3. Measure the resistance between MAP sensor/IAT sensor No. 2 terminals 1 and 2.

        If not as specified, replace the MAP sensor/IAT sensor No. 2.

        Refer to REMOVAL [07/2015 - ] 

        GTY484951Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        IAT (°C (°F)) Resistance (Kilohms)
        0 (32) Approx. 5.9
        20 (68) Approx. 2.5
        80 (176) Approx. 0.323
        130 (266) Approx. 0.0893
        GTY493501Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Resistance (Kilohms)
        *b IAT (°C (°F))
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