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Component Inspection

Check IATS resistance.

IG "OFF".
Disconnect IATS connector.

Measure resistance between terminal 1 and 5 of IATS connector. (Component Side)

INTAKE AIR TEMPERATURE SENSOR SPECIFICATION

Temperature		Resistance [Ω]
°C	°F	Resistance [Ω]
-40	-40	41.26 ~ 47.49kΩ
-20	-4	14.26 ~ 16.02 kΩ
0	32	5.5 ~ 6.05 kΩ
20	68	2.35 ~ 2.54kΩ
40	104	1.11 ~ 1.19kΩ
60	140	0.57 ~ 0.6kΩ
80	176	0.31 ~ 0.32 kΩ

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

G04801584

Is the measured resistance within specification ?
YES : --> Go to "Check ECM/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 ECM/PCM.
1. IG "OFF" and disconnect MAFS/MAPS connector.
2. Connect scantool and Key "ON".
3. Select simulation function on scantool.
4. Simulate voltage at terminal 5 of IATS signal connector.
  
  Fig 2: Scantool Display - Simulation Of Voltage
5. Does the signal value of IATS 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 ECM/PCM and check for proper operation.
  
  --> If the problem is corrected, replace ECM/PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.