Monitor DTC Status

This is the inspection procedure to determine whether it is present DTC or memoried one by monitoring the current signal or by using the function of oscilloscope with Hi-scan pro.

1. Connect scan tool to Data Link Connector (DLC).
2. Warm up the engine to normal operating temperature.
3. Monitor the "IATS signal" parameter on the scan tool.
   Fig 1: Identifying Scan Tool Display (Current Data)

   Courtesy of HYUNDAI MOTOR CO.
   NOTE: If the output voltage moves in reverse direction while air temperature changes, the IAT sensor is normal.
   When IAT sensor is in malfunction, the default value for IAT is 20.3°C.

   Service standard

   0°C (32°F): 4.0~4.4V

   20°C (68°F): 3.3~3.7V

   40°C (104°F): 2.5~2.9V

   80°C (176°F): 1.0~1.4V

4. Is parameter displayed within specifications?

   YES 

   • Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared.

     Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Go to "W/HARNESS INSPECTION" procedure