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EC9-194 < DTC/CIRCUIT DIAGNOSIS > [R9M] P0100 MAF SENSOR P0100 MAF SENSOR DTC Logic INFOID:0000000010309104 DTC DETECTION LOGIC 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 2 second. 2. Check DTC. Is DTC detected? YES >> Proceed to EC9-194, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010309105 1. CHECK MASS AIR FLOW SENSOR POWER SUPPLY CIRCUIT Check the power supply of the mass air flow sensor. Is the inspection result normal? YES >> GO TO 2. NO >> Perform trouble diagnosis for power supply circuit. 2. CHECK MASS AIR FLOW SENSOR CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Check mass air flow sensor circuit for open and short. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace error-detected parts. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0100 AIR FLOW SENSOR CIRCUIT • An excessively low voltage from the sensor is sent to ECM for 2 seconds or more. • An excessively high voltage from the sensor is sent to ECM for 2 seconds or more. • Harness or connectors (Mass air flow sensor circuit is open or • Mass air flow sensor + - Voltage Mass air flow sensor Connector Terminal F91 3 Ground 5.0 V + - Continuity ECM Mass air flow sensor Connector Terminal Connector Terminal F82 78 F91 4 Existed 82 2 |