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DTC P00FE: Evaporative Emission System Fuel Tank Vapor Line Restricted/Blocked
 
 
 
 
TECHNICAL DESCRIPTION
  • During the key-off evaporative leakage monitoring, it is judged as a failure when the values of fuel tank differential pressure sensor, the fuel tank pressure sensor and the canister pressure sensor are not within the specified value range.
 
 
MONITOR EXECUTION
  • Once per driving cycle.
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Evaporative emission purge solenoid monitor
  • Bypass valve monitor
  • Fuel tank solenoid valve monitor
  • Switching valve monitor
  • Canister pressure sensor monitor
  • Manifold absolute pressure sensor monitor
  • Fuel tank pressure sensor monitor
  • Fuel tank differential pressure sensor monitor
  • Barometric pressure sensor/Manifold absolute pressure correlation
  • Barometric pressure sensor monitor
  • Fuel level sensor monitor
  • Engine off timer monitor
  • Controller area network (CAN) monitor
Sensor (The sensor below is determined to be normal)
  • Engine coolant temperature sensor
  • Intake air temperature sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • Power supply mode of electric motor switch is OFF.
  • 12V starter battery positive voltage is 11 volts or higher.
  • Engine coolant temperature is higher than 4°C (39°F) and lower than 35°C (95°F).
  • Intake air temperature at ECM wake-up is higher than 4°C (39°F) and lower than 35°C (95°F).
  • ECM is woken up in 5, 6 or 8.5 hours since the power supply mode of electric motor switch was OFF.
  • Barometric pressure is 76 kPa (22.4 in.Hg) or higher.
  • Fuel level is 85 % or less.
  • Fuel tank pressure at ECM wake-up is less than 19.96 kPa (5.89 in.Hg) or more than 40.00 kPa (11.81 in.Hg).
Judgment Criteria
  • The fuel tank absolute pressure subtracted from the barometric pressure measured by the fuel tank pressure sensor is more than specified pressure.
  • The fuel tank pressure subtracted from the barometric pressure measured by the fuel tank differential pressure sensor is less than specified pressure.
  • The canister pressure is less than specified pressure.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Fuel filler lid cannot be opened even when pressing the fuel filler lid opener switch.
  • Indicates "REFUELING SYSTEM SERVICE REQUIRED" on the information screen in the multi-information display.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 4 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Vapor line is clogged.
  • Fuel tank vapor port is clogged.
  • Fuel tank solenoid valve stuck closed.
  • Bypass valve stuck closed.
  • Fuel tank differential pressure sensor stuck.
  • Evaporative emission canister is clogged.
  • Shorted bypass valve circuit or connector damage.
  • Open or Shorted fuel tank solenoid valve circuit, harness damage or connector damage.
  • ECM failed.

 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), read the diagnostic trouble code (DTC).
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Turn on the power supply mode of the electric motor switch.
(3) Read the DTC.
(4) Turn off the power supply mode of the electric motor switch.
Is DTC P1451 or P2451 set?
Refer to DTC P1451 - Bypass Valve Stuck Closed , DTC P2451 - Fuel Tank Solenoid Valve Stuck Close .
Go to Step 2.
 
STEP 2. Check piping clogging between the bypass valve and the fuel tank solenoid valve.
(1) Disconnect the hose E from fuel tank solenoid valve.
(2) Disconnect the hose D from bypass valve and mount the hand vacuum pump on the hose side.
  • When negative pressure is applied with the hand vacuum pump, check that there is ventilation and no clogging.
Are the hoses and pipes in good condition?
Go to Step 3.
Repair the hose(s) or pipe(s). Then go to Step 11.
 
STEP 3. Check piping clogging between the fuel tank solenoid valve and the fuel tank.
(1) Drain the fuel from the fuel tank.
(2) Remove the hose H.
(3) Mount the hand vacuum pump to the hose H.
  • When negative pressure is applied with the hand vacuum pump, check that there is ventilation and no clogging.
Is the hose H in good condition?
Go to Step 4.
Repair the hose H. Then go to Step 11.
 
STEP 4. Check clogging of the fuel tank vapor port
Disconnect the hose H from the fuel tank, and visually check whether the vapor port is blocked by foreign matters etc.
Is the fuel tank in good condition?
Go to Step 5.
Clean the vapor port. Then go to Step 11.
 
STEP 5. Check of harness damage in FTS+ line between fuel tank solenoid valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 6.
Repair the connector(s) or wiring harness. Then go to Step 11.
 
STEP 6. Check of harness damage in ground line between fuel tank solenoid valve connector and ground.
Is the harness wire in good condition?
Go to Step 7.
Repair the connector(s) or wiring harness. Then go to Step 11.
 
STEP 7. Check of harness damage in power supply line between MFI relay connector and bypass valve connector.
Is the harness wire in good condition?
Go to Step 8.
Repair the connector(s) or wiring harness. Then go to Step 11.
 
STEP 8. Check of harness damage in VAPR line between bypass valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 9.
Repair the connector(s) or wiring harness. Then go to Step 11.
 
STEP 9. Using scan tool (M.U.T.-IIISE), check data list item 210: Fuel Tank Differential Pressure Sensor.
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Disconnect the hose D from the bypass valve.
(3) Plug the disconnected end of hose D.
(4) Turn on the power supply mode of the electric motor switch.
(5) Remove the fuel cap.
(6) Set scan tool (M.U.T.-IIISE) to the data reading mode for item 210, Fuel Tank Differential Pressure Sensor.
  • The standard value should be -0.57 to 0.57 kPa (-0.168 to 0.168 in.Hg).
(7) Connect the evaporative emission system pressure pump (Miller number 6872A) to the fuel tank filler tube by using fuel tank adapter (MLR-8382) and pressurize the fuel tank in the range of 30 kPa (8.9 in. Hg) or less.
  • The fuel tank pressure reading should increase.
(8) Turn off the power supply mode of the electric motor switch.
(9) Remove the evaporative emission system pressure pump (Miller number 6872A) and the fuel tank adapter (MLR-8382), and reinstall the fuel cap.
(10) Connect hose D to the bypass valve.
Is the sensor operating properly?
Go to Step 10.
Refer to DTC P0450 - Evaporative Emission System Pressure Sensor Malfunction . Then go to Step 11.
 
STEP 10. Replace the evaporative emission canister.
(1) Replace the evaporative emission canister.
(2) Carry out an evaporative emission system monitor. Refer to Evaporative Emission System Monitor Test .
(3) Check the item 217, Vapor Line Clogged in the data list.
(4) Turn off the power supply mode of the electric motor switch.
Is the data list "Normal"?
The inspection is complete.
Replace the ECM (Refer to Removal and Installation ). Then go to Step 11.
 
STEP 11. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 4 .
(2) Read the diagnostic trouble code.
Is DTC P00FE set?
Retry the troubleshooting.
The inspection is complete.