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Home >> Hyundai >> 2001 >> Tiburon Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0112 Or P0113: Intake Air Temperature (IAT) Sensor Circuit >> Test Procedures
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Test Procedures

NOTE: It is recommended that vehicle cool down overnight before starting IAT sensor test procedure.
  1. Ensure engine is cooled to ambient air temperature. Measure ambient air temperature. Turn ignition on. Using scan tool, read IAT sensor temperature. If IAT sensor temperature and ambient air temperature are not about the same, go to next step. If IAT sensor temperature and ambient air temperature are about the same, no problem is indicated at this time. Problem is intermittent or was repaired and DTCs were not cleared. Clear DTCs and ensure IAT sensor is operating properly.
  2. Turn ignition off. Disconnect IAT 2-pin connector. Turn ignition on. Measure voltage between ground and IAT connector terminal No. 1 (Pink/Black wire). Voltage should be 4.5-5.0 volts. If DTC P0112 is set and zero volts exist, go to next step. If DTC P0112 is set and 4.5-5.0 volts exist, go to step  4 . If DTC P0113 is set and zero volts exist, go to step  5 . If DTC P0113 is set and 4.5-5.0 volts exist, replace IAT sensor. When repairs are completed, clear DTCs and verify MAF sensor operation.
  3. Turn ignition off. Disconnect ECM 88-pin connector. Using a jumper wire, ground IAT connector terminal No. 1 (Pink/Black wire). Measure resistance between ground and ECM connector terminal No. 77 (Pink/Black wire). See Figure . If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in Pink/Black wire between IAT sensor and ECM. When repairs are completed, clear DTCs and verify IAT operation.
  4. Turn ignition off. Disconnect IAT connector and ECM 88-pin connector, if not already disconnected. Using a jumper wire, ground IAT connector terminal No. 2 (Brown/Black wire). Measure resistance between ground and ECM connector terminal No. 71. See Figure . If resistance is more than one ohm, repair open between IAT and ECM. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If connector terminals are okay, replace IAT sensor with a known-good component. Clear DTCs and verify IAT sensor operation. If problem still exists, replace ECM. When repairs are completed, clear DTCs and verify IAT operation.
  5. Turn ignition off. Disconnect IAT connector and ECM 88-pin connector. Check for continuity between ground and IAT sensor connector terminal No. 1 (Pink/Black wire). If continuity does not exist, ensure ECM connector terminals are clean and tight. If connector terminals are okay, replace ECM. If continuity exists, repair short to ground in Pink/Black wire between IAT sensor and ECM connectors. When repairs are completed, clear DTCs and verify IAT operation.
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