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P0181 FTT SENSOR EC-253 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O 4. Check the voltage between fuel level sensor unit and fuel pump harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. DETECT MALFUNCTIONING PART Check the following. • Harness for open or short between ECM and fuel level sensor unit and fuel pump • Loose or poor connection for each connector and harness >> Repair open circuit, short to ground or short to power in harness or connector. 4. CHECK FTT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Check the continuity between fuel level sensor unit and fuel pump harness connector and ground. 3. Also check harness for short to ground and short to power. YES >> GO TO 6. NO >> GO TO 5. 5. DETECT MALFUNCTIONING PART Check the following. • Harness for open or short between fuel level sensor unit and fuel pump and ground • Loose or poor connection for each connector and harness >> Repair open circuit, short to ground or short to power in harness or connector. 6. CHECK FTT SENSOR Check FTT sensor. Refer to EC-253, "Component Inspection" Is the inspection result normal? YES >> GO TO 7. NO >> Replace fuel level sensor unit and fuel pump. Refer to FL-11, "Removal and Installation" 7. CHECK INTERMITTENT INCIDENT Check intermittent incident. Refer to GI-42, "Intermittent Incident" . >> INSPECTION END Component Inspection INFOID:0000000009886659 1. CHECK FUEL TANK TEMPERATURE (FTT) SENSOR 1. Turn ignition switch OFF. 2. Disconnect fuel level sensor unit and fuel pump harness connector. 3. Remove fuel level sensor unit. Refer to FL-11, "Removal and Installation" . Fuel level sensor unit and fuel pump Ground Voltage (V) Connector Terminal C5 4 Ground Approx. 5 PBIB0932E Fuel level sensor unit and fuel pump Ground Continuity Connector Terminal C5 3 Ground Existed |