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Component Inspection

Check IATS.

Ignition "OFF".
Disconnect IATS connector.

Measure resistance between terminal 5 and 3 of IAT connector (Component side).

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

TEMPERATURE AND RESISTANCE REFERENCE CHART

Temperature (°C/°F)	-40 (-40° F)	-30 (-22° F	-20 (-4°F)	0 (32°F)	20 (68°F)	80 (176° F)	100 (212° F)	110 (230° F)	120 (248° F)
Resistance (kΩ)	45.3	25.6	15.1	5.8	2.5	0.33	0.19	0.16	0.13
Voltage (V)	4.48	4.34	4.12	3.46	2.57	0.64	0.39	0.34	0.27

Fig 1: Measuring Resistance Between Terminal 5 And 3 Of IAT Connector (Component Side)

G07374981

Is the measured resistance within specifications?
YES
- Go to " 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.

Check PCM.
1. Ignition "OFF" & Engine "OFF".
2. Connect scantool and Ignition "ON".
3. Select simulation function on scantool.
4. Simulate voltage at terminal 5 of IAT sensor signal connector.
  
  Fig 2: Screen Display - IAT Sensor Voltage Simulation
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 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.