Component Inspection

Check IATS resistance

IG "OFF".
Disconnect IATS connector.

Measure resistance between terminal 3 and 4 of IATS connector. (Component Side)

Specification:

TEMPERATURE RESISTANCE SPECIFICATION CHART

Temp. (°C)	-40.0	-20.0	0.0	20.0	40.0	60.0	80.0
Temp. (°F)	-40.0	-4.0	32.0	68.0	104.0	140.0	176.0
Resist. (kΩ)	41.26 ~ 47.49	14.26 ~ 16.02	5.5 ~ 6.05	2.35 ~ 2.54	1.11 ~ 1.19	0.57 ~ 0.6	0.31 ~ 0.32

Fig 1: Measuring Resistance Between Terminal 3 And 4 Of IATS Connector (Component Side)

G06881282

Courtesy of HYUNDAI MOTOR CO.

Is the measured resistance within specification?
YES
1. Go to " 2 Check PCM" as follows.
NO
1. 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".
2. Connect scan tool and Engine "ON".
3. Select simulation function on scan tool.
4. Simulate voltage at terminal 3 of IATS signal connector.
  
  Fig 2: Screen Display - Intake Air Temperature Sensor Voltage
  Courtesy of HYUNDAI MOTOR CO.
  
  Fig 3: Identifying Intake Air Temperature Sensor Connector Terminals
  Courtesy of HYUNDAI MOTOR CO.
5. Does the signal value of IATS change according to simulation voltage?
  YES
  1. 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
  1. 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.