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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:

TEMPERATURE AND RESISTANCE SPECIFICATIONS

Temperature	Resistance	Voltage
20°C (68°F)	2.33~2.97 kΩ	2.5~2.7V
80°C (176°F)	0.31~0.43 kΩ	0.6~0.8V

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

G07374077

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: 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.