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P0102, P0103 MAF SENSOR EC-701 < COMPONENT DIAGNOSIS > [QR25DE EXCEPT FOR CALIFORNIA] C D E F G H I J K L M A EC N P O NO >> INSPECTION END Diagnosis Procedure INFOID:0000000004349668 1. INSPECTION START Confirm the detected DTC. P0102 >> GO TO 2. P0103 >> GO TO 3. 2. CHECK INTAKE SYSTEM Check the following for connection. • Air duct • Vacuum hoses • Intake air passage between air duct to intake manifold YES >> GO TO 3. NO >> Reconnect the parts. 3. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E9. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 4. NO >> Repair or replace ground connection. 4. CHECK MAF SENSOR POWER SUPPLY CIRCUIT 1. Disconnect mass air flow (MAF) sensor harness connector. 2. Turn ignition switch ON. 3. Check the voltage between MAF sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 6. NO >> GO TO 5. 5. DETECT MALFUNCTIONING PART Check the following. • Junction block connector E44 • Harness connector E11,F2 • 15A fuse (No,42) • Harness for open or short between mass air flow sensor and ECM • Harness for open or short between mass air flow sensor and IPDM E/R >> Repair open circuit or short to ground or short to power in harness or connectors. 6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between MAF sensor harness connector and ECM harness connector. MAF sensor Ground Voltage Connector Terminal F31 5 Ground Battery voltage PBIB1169E |