Component Inspection

Check IATS resistance

IG "OFF" and disconnect IATS connector.

Measure resistance between signal and ground terminals of IATS connector after checking out the temperature of IATS with scantool. (Component Side)

Specification:

TEMPERATURE AND RESISTANCE SPECIFICATIONS

Temp. (°C)	Resistance (kΩ)	Temp. (°C)	Resistance (kΩ)
-40	95.95 ~ 105.78	20	3.42 ~ 3.61
-20	27.4 ~ 29.77	40	1.43 ~ 1.5
0	9.08 ~ 9.72	60	0.66 ~ 0.69
10	5.49 ~ 5.83	80	0.33 ~ 0.34

Fig 1: Measuring Resistance Between Signal And Ground Terminals Of IATS Connector After Checking Out Temperature Of IATS With Scantool (Component Side)

Courtesy of HYUNDAI MOTOR CO.

Is the measured resistance within specification?
YES
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM 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 ECM. Before or after testing ECM on the vehicle, use this function to reuse the ECM on the others
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.