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P0181 FTT SENSOR EC-251 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] C D E F G H I J K L M A EC N P O 4. Check resistance between fuel level sensor unit and fuel pump terminals by heating with hot water as shown in the figure. Is the inspection result normal? YES >> Check intermittent incident. Refer to NO >> Proceed to . Diagnosis Procedure INFOID:0000000009267136 1. INSPECTION START Confirm the detected malfunction (A or B). Refer to . Which malfunction is detected? A >> GO TO 2. B >> GO TO 6. 2. CHECK DTC WITH COMBINATION METER Check DTC with combination meter. Refer to (TYPE A) or (TYPE B). Check the vehicle type to confirm the service information in MWI section. Refer to . Is the inspection result normal? YES >> GO TO 3. NO >> Proceed to MWI-46, "Component Function Check" (TYPE A) or (TYPE B). 3. CHECK FUEL TANK TEMPERATURE (FTT) SENSOR POWER 1. Turn ignition switch OFF. 2. Disconnect fuel level sensor unit and fuel pump harness connector. 3. Turn ignition switch ON. 4. Check the voltage between fuel level sensor unit and fuel pump harness connector and ground. Is the inspection result normal? YES >> GO TO 5. NO >> GO TO 4. 4. CHECK FUEL TANK TEMPERATURE (FTT) SENSOR POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between fuel level sensor unit and fuel pump harness connector and ECM harness connector. 4. Also check harness for short to ground and to power. Fuel level sensor unit and fuel pump Condition Resistance (k Ω) Terminal 4 5 Temperature [ °C (°F)] 20 (68) 2.3 – 2.7 50 (122) 0.79 – 0.90 JMBIA0167ZZ Fuel level sensor unit and fuel pump Ground Voltage (Approx.) Connector Terminal B44 4 Ground 5 V Fuel level sensor unit and fuel pump ECM Continuity Connector Terminal Connector Terminal B44 4 F11 42 Existed |