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Component Inspection

Check IATS

IG "OFF" and disconnect IATS connector.

Measure resistance between terminals 4 and 5 of IATS connector. (Component side)

SPECIFICATION:

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 Terminals 4 And 5 Of IATS Connector (Component Side)

G05321948

Courtesy of HYUNDAI MOTOR CO.

Is the measured resistance within specification ?
YES
- Go to " 2Check 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" and ENG "OFF" and simulation Function on scantool.
4. Simulate voltage at terminal 4 of IATS harness connector.
  
  Fig 2: Scantool Display - INTAKE AIR TEMP
  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.