Intake Air Temperature Sensor: Inspection: Procedure

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

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 

   Courtesy 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

   Courtesy 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

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

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

   Refer to REMOVAL 

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 

   Courtesy 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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Resistance (Kilohms)
   *b	IAT (°C (°F))