Component Inspection

1. Specification:
   TEMPERATURE RESISTANCE REFERENCE CHART
   
   

   Temperature °C (°F)	-40	-30	-20	0	20	80	100	110	120
   Resistance (kΩ)	45.3	25.6	15.1	5.8	2.5	0.33	0.19	0.16	0.13
   Voltage (V)	4.48	4.34	4.12	3.46	2.57	0.64	0.39	0.34	0.27

   (Pull up resistance is Approx. 2.2 kΩ and above specification's error range is 2~3%.)

   Fig 1: Measuring Resistance Between Terminals 1 And 2 Of IAT Sensor Connector B-29

   

YES

1. IAT sensor is OK.
2. Possibility of defective ECM. Temporarily test with a new ECM and check for proper operation. If problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

NO

1. Test with a new IAT sensor and check for proper operation. If problem is corrected, replace it. And go to "VERIFICATION OF VEHICLE REPAIR " procedure.