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EC-194 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] P0112, P0113 IAT SENSOR P0112, P0113 IAT SENSOR DTC Logic INFOID:0000000009020706 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test. 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 5 seconds. 2. Check 1st trip DTC. YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009020707 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E15. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 1. Disconnect mass air flow (MAF) sensor (with intake air temperature sensor) harness connector. 2. Turn ignition switch ON. 3. Check the voltage between mass air flow sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between mass air flow sensor harness connector and ECM harness connector. DTC No. Trouble diagnosis content DTC detecting condition Possible cause P0112 Intake air temperature sensor An excessively low voltage from the sensor • Harness or connectors (The sensor circuit is open or shorted.) • Intake air temperature sensor P0113 Intake air temperature sensor An excessively high voltage from the sensor MAF sensor Ground Voltage Connector Terminal F31 5 Ground Approx. 5 V |