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P0112, P0113 IAT SENSOR ECM-189 < DTC/CIRCUIT DIAGNOSIS > [MR20DD] C D E F G H I J K L M A ECM N P O P0112, P0113 IAT SENSOR DTC Description INFOID:0000000010702912 DTC DETECTION LOGIC POSSIBLE CAUSE • Harness or connectors (The intake air temperature sensor circuit is open or shorted.) FAIL-SAFE Not applicable PERFORM DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 5 seconds. 2. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to ECM-189, "Diagnosis Procedure" . NO-1 >> To check malfunction symptom before repair: Refer to GI-41, "Intermittent Incident" NO-2 >> Confirmation after repair: INSPECTION END Diagnosis Procedure INFOID:0000000010702913 1. CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY 1. Turn ignition switch OFF. 2. Disconnect mass air flow (MAF) sensor (intake air temperature sensor is built-in) harness connector. 3. Turn ignition switch ON. 4. Check the voltage between MAF sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 2. 2. CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition P0112 IAT SEN/CIRCUIT-B1 An excessively low voltage from the sensor is sent to ECM. P0113 IAT SEN/CIRCUIT-B1 An excessively high voltage from the sensor is sent to ECM. + Ground Voltage MAF sensor Connector Terminal F73 2 Ground Approx. 5 V |