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Home >> Hyundai >> 2011 >> Azera GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0112: Intake Air Temperature Sensor 1 Circuit Low Input >> Inspection/Repair >> W/Harness Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

  1. IG "OFF" and disconnect IATS connector.
  2. IG "ON".
  3. Measure voltage between signal terminal of IATS harness connector and chassis ground.

    Specification:  Approx. 5V

    Fig 1: Measuring Voltage Between Signal Terminal Of IATS Harness Connector And Chassis Ground
    G07251258Courtesy of HYUNDAI MOTOR CO.
  4. Is the measured voltage within specification?

    YES 

    NO 

    • Go to "Check short to ground in harness".
  1. IG "OFF" and disconnect IATS connector and ECM connector.
  2. Measure resistance between signal terminal of IATS harness connector and chassis ground. (Measurement "A")
  3. Measure resistance between signal and ground terminals of IATS harness connector. (Measurement "B")
  4. Measure resistance between signal terminal of IATS harness connector and ground terminal of MAFS harness connector. (Measurement "B")

    Specification:  Infinite

    Fig 2: Measuring Resistance Between Signal Terminal Of IATS Harness Connector And Chassis Ground (Measurement A)
    G07251259Courtesy of HYUNDAI MOTOR CO.
    Fig 3: Measuring Resistance Between Signal And Ground Terminals Of IATS Harness Connector (Measurement B)
    G07251260Courtesy of HYUNDAI MOTOR CO.
  5. Is the measured resistance within specification?

    YES 

    NO 

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