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EC-150 < COMPONENT DIAGNOSIS > [VQ25DE, VQ35DE] P0102, P0103 MAF SENSOR NO >> INSPECTION END Diagnosis Procedure INFOID:0000000003856534 1. INSPECTION START Confirm the detected DTC. Which DTC is detected? P0102 >> GO TO 2. 2. CHECK INTAKE SYSTEM Check the following for connection. Is the inspection result normal? YES >> GO TO 3. NO >> Reconnect the parts. 3. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E38. 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. >> Repair open circuit, 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. 4. Also check harness for short to ground and short to power. MAF sensor Ground Voltage Connector Terminal F4 5 Ground Battery voltage MAF sensor ECM Continuity Connector Terminal Connector Terminal F4 4 F8 56 Existed |