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P0181 FTT SENSOR EC-715 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE FOR USA AND CANADA] C D E F G H I J K L M A EC N P O 2. Disconnect “fuel level sensor unit and fuel pump” harness con- nector. 3. Turn ignition switch ON. 4. Check voltage between “fuel level sensor unit and fuel pump” terminal 4 and ground with CONSULT or tester. OK or NG OK >> GO TO 5. NG >> GO TO 4. 4. DETECT MALFUNCTIONING PART Check the following. • Harness connectors E41, C1 • Harness for open or short between ECM and “fuel level sensor unit and fuel pump” >> Repair harness or connector. 5. CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 and ground. Refer to Wiring Diagram. 3. Also check harness for short to power. OK >> GO TO 7. NG >> GO TO 6. 6. DETECT MALFUNCTIONING PART Check the following. • Harness connectors E41, C1 • Harness for open or short between “fuel level sensor unit and fuel pump” ground >> Repair open circuit or short to power in harness or connector. 7. CHECK FUEL TANK TEMPERATURE SENSOR EC-716, "Component Inspection" OK or NG OK >> GO TO 8. NG >> Replace fuel level sensor unit. Refer to FL-10, "Removal and Installation" 8. CHECK INTERMITTENT INCIDENT GI-42, "Intermittent Incident" . >> INSPECTION END BBIA0545E Voltage: Approximately 5V Continuity should exist. |