Component Inspection

Check resistance of IATS

IG "OFF" and disconnect IATS connector.

Measure resistance between terminal 4 and 5 of IATS connector. (Component Side)

RESISTANCE SPECIFICATION

Temp. (°C/°F)	Resistance (kΩ)	Temp. (°C/°F)	Resistance (kΩ)
-40(-40)	95.95 ~ 105.78	20(68)	3.42 ~ 3.61
-20(-4)	27.4 ~ 29.77	40(104)	1.43-1.5
0(32)	9.08 ~ 9.72	60(140)	0.66 ~ 0.69
10(50)	5.49 ~ 5.83	80(176)	0.33 ~ 0.34

Fig 1: Measuring Resistance Between Terminal 4 And 5 Of IATS Connector

Courtesy of HYUNDAI MOTOR CO.

Is the measured resistance within specification ?
YES
- Go to 2 "Check PCM" as follows.
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.

Check PCM
1. IG "OFF" and connect scantool.
2. Disconnect IATS connector and connect probe to terminal 4 of IATS harness connector.
3. IG "ON" & ENG "OFF" and simulation Function on scantool.
4. Simulate voltage at terminal 4 of IATS harness connector.
  
  Fig 2: Scan Tool Display - Simulation Of Voltage
  Courtesy of HYUNDAI MOTOR CO.
5. Does the signal value of IAT sensor change 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.

NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.