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P0101 MAF SENSOR EC-179 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] C D E F G H I J K L M A EC N P O 2. Check ground connection E15. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace ground connection. 3. CHECK MASS AIR FLOW (MAF) SENSOR POWER SUPPLY CIRCUIT 1. Disconnect 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 5. NO >> GO TO 4. 4. DETECT MALFUNCTIONING PART Check the following. • Harness connectors E55, F55 • 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. 5. 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. 4. Also check harness for short to ground and short to power. YES >> GO TO 6. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 6. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check the continuity between MAF sensor harness connector and ECM harness connector. 2. Also check harness for short to ground and short to power. YES >> GO TO 7. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 7. CHECK INTAKE AIR TEMPERATURE SENSOR Check the intake air temperature sensor. Refer to EC-189, "Component Inspection" . Is the inspection result normal? YES >> GO TO 8. MAF sensor Ground Voltage Connector Terminal F31 2 Ground Battery voltage MAF sensor ECM Continuity Connector Terminal Connector Terminal F31 3 F11 52 Existed MAF sensor ECM Continuity Connector Terminal Connector Terminal F31 4 F11 45 Existed |