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DTC Diagnosis Procedure
1.CHECK FUEL TANK TEMPERATURE (FTT) SENSOR POWER SUPPLY
  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.
    +−Voltage
    (Approx.)
    Fuel level sensor unit and fuel pump
    ConnectorTerminal
    B10 3Ground5 V
Is the inspection result normal?
.
.
 
2.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.
    +−Continuity
    Fuel level sensor unit and fuel pumpECM
    ConnectorTerminalConnectorTerminal
    B10 3E16136Existed
  4. Also check harness for short to ground and to power.
Is the inspection result normal?
Perform the trouble diagnosis for power supply circuit.
Repair or replace error-detected parts.
 
3.CHECK FUEL TANK TEMPERATURE (FTT) SENSOR GROUND CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM connector.
  3. Check the continuity between fuel level sensor unit and fuel pump harness connector and ECM harness connector.
    +−Continuity
    Fuel level sensor unit and fuel pumpECM
    ConnectorTerminalConnectorTerminal
    B10 2E16155Existed
  4. Also check harness for short to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
4.CHECK FUEL TANK TEMPERATURE (FTT) SENSOR
Check the FTT sensor. Refer to Component Inspection.
Is the inspection result normal?
Check intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
Replace “fuel level sensor unit and fuel pump”. Refer to Exploded View.