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EC-250 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0181 FTT SENSOR 5. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to . NO >> INSPECTION END Component Function Check INFOID:0000000009719979 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 4. Check resistance between fuel level sensor unit and fuel pump Is the inspection result normal? YES >> GO TO 2. NO >> Proceed to . 2. CHECK INTERMITTENT INCIDENT Check intermittent incident. Refer to GI-44, "Intermittent Incident" . Is the inspection result normal? YES >> INSPECTION END NO >> Proceed to . Diagnosis Procedure INFOID:0000000009719980 1. INSPECTION START Confirm the detected malfunction (A or B). Refer to . Which malfunction is detected? A >> GO TO 2. B >> GO TO 7. 2. 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 3. NO >> Repair or replace ground connection. 3. CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 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. Terminals Condition Resistance (k Ω ) 4 and 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 Connector Terminal B40 4 Ground Approx. 5 V |