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DTC P2450: Fuel Tank Solenoid Valve Stuck Open

 
 
 
 
CIRCUIT OPERATION
  • Refer to DTC P2419 - Fuel Tank Solenoid Valve Control Circuit Low .
 
 
TECHNICAL DESCRIPTION
  • During the key-off evaporative leakage monitoring, after reducing the fuel tank pressure, when fuel tank pressure returns to atmospheric pressure from negative pressure when the evaporative emission purge solenoid valve is opened during the fuel tank solenoid valve closing instruction, it is judged as fuel tank solenoid valve stuck open.
 
 
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 Criterion
  • The fuel tank absolute pressure subtracted from the barometric pressure measured by the fuel tank pressure sensor is less than specified pressure for 20 seconds.
 
 
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 3 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Fuel tank solenoid valve stuck open.
  • Shorted fuel tank solenoid valve circuit 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 P2419 or P2420 set?
Refer to DTC P2419 - Fuel Tank Solenoid Valve Circuit Low Input , DTC P2420 - Fuel Tank Solenoid Valve Circuit High Input .
Go to Step 2.
 
STEP 2. Check the fuel tank solenoid valve for leaks.
Refer to GROUP 17, Emission Control - Evaporative Emission Control System - Fuel Tank Solenoid Valve Check .
Does the fuel tank solenoid valve hold pressure?
Go to Step 3.
Replace the fuel tank solenoid valve. Then go to Step 4.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check the evaporative emission system monitor test.
(1) Carry out an evaporative emission system monitor. Refer to Evaporative Emission System Monitor Test .
(2) Check the item 195, Sealing Valve Stuck Open in the data list.
(3) Turn off the power supply mode of the electric motor switch.
Is the data list "Normal"?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/ Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to Removal and Installation ). Then go to Step 4.
 
STEP 4. 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 3 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P2450 set?
Retry the troubleshooting.
The inspection is complete.