Component Inspection

1. Ignition "OFF"
2. Disconnect IATS connector.
3. Measure resistance between terminal 5 and 3 of IAT connector (Component side).

   Specification: (error range is 2~3%.)

   TERMINALS RESISTANCE CHART
   
   

   Temperature (°C/°F)	0 (32°F)	20 (68°F)	40 (104°F)	80 (176°F)
   Resistance (Ω)	5.3 -6.7	2.3-3.0	1.0-1.5	0.3-0.42

   Fig 1: Measuring Resistance Between Terminal 5 And 3 Of IAT Connector

   Courtesy of HYUNDAI MOTOR CO.
4. Is the measured resistance within specifications?

   YES:  

   • Go to step  2 "Check PCM" as below.

   NO:  

   • Substitute with a known - good IATS and check for proper operation.

If the problem is corrected, replace IATS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

1. Ignition "OFF"
2. Connect Scan Tool and Ignition "ON" & Engine "OFF"
3. Select simulation function on scan tool.
4. Simulate voltage at terminal 5 of IAT sensor signal connector.
   Fig 2: Scan Tool Display - SIMULATION FUNCTION

   Courtesy of HYUNDAI MOTOR CO.
5. Does the signal value of IAT sensor changes according to simulation voltage?

   YES:  

   • Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO:  

   • Substitute with a known - good PCM and check for proper operation.

If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.