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HOMESERVICE MANUALSHYUNDAI2005SANTA FE GLS, 2.7 D, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROL SYSTEM DIAGNOSIS (3.5L) (1 OF 2))DTC TROUBLESHOOTING PROCEDURESDTC P0112: INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT LOW INPUTCOMPONENT INSPECTION
2005 Hyundai Santa Fe GLS, 2.7 D, AWD

Component Inspection

2005 Hyundai Santa Fe GLS, 2.7 D, AWDSECTION Component Inspection
WARNING: This page is about a different variant/trim than selected.
  1. Check IATS
    1. Ignition "OFF"
    2. Disconnect IATS connector.
    3. Measure resistance between terminal 5 and 3 of IAT connector (Component side).

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

      INTAKE AIR TEMPERATURE SENSOR SPECIFICATIONS

      Temperature (°/°F) 0 (32°F) 20 (68°F) 40 (104°F) 80 (176°F)
      Resistance (Ω) 5.3 ~ 6.7 2.3~3.0 1.0~1.5 0.3~0.42
      Fig 1: Measuring Resistance Between Terminal 5 And 3 Of IAT Connector (Component Side)
      G03845426Courtesy of HYUNDAI MOTOR CO.
    4. Is the measured resistance within specifications?

      YES 

      • Go to next step .

      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.

  2. Check PCM
    1. Ignition "OFF"
    2. Connect Scan tool and Ignition "ON" & Engine "OFF"
    3. Select simulation function on scan tool.
    4. Simulate voltage at terminal 5 of IAT sensor signal connector.
      Fig 2: Scan Tool Simulation Function
      G03845427Courtesy of HYUNDAI MOTOR CO.
    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, or 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.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.