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DTC P2420: Fuel Tank Solenoid Valve Control Circuit High

 
 
 
 
CIRCUIT OPERATION
  • 12V starter battery voltage is applied to the fuel tank solenoid valve from the ECM terminal FTS+.
  • The ground terminal is grounded to the vehicle body.
 
 
TECHNICAL DESCRIPTION
  • Seal the fuel tank and keep the fuel tank internal pressure. In response to a signal from the ECM, open the fuel tank solenoid valve and release the sealed state of the fuel tank.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Check Conditions
  • More than 2 seconds have passed since the power supply mode of electric motor switch was ON.
  • 12V starter battery positive voltage is between 10 and 16.5 volts.
Judgment Criterion
  • Monitor for the malfunction detection in ECU is detected.
 
 
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 1 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Fuel tank solenoid valve failed.
  • 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), check evaporative emission system component test item 5 and 6: Fuel Tank Solenoid Valve.
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) Check the following items in the evaporative emission system component test. Refer to Evaporative Emission System Component Test Reference Table .
  1. Item 5: Sealing Valve Solenoid ON
  2. Item 6: Sealing Valve Solenoid OFF
(4) Turn off the power supply mode of the electric motor switch.
Is the solenoid operating properly?
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 .
Go to Step 2.
 
STEP 2. Check the fuel tank solenoid valve.
(1) Disconnect connector, and measure at solenoid side.
(2) Measure the resistance between fuel tank solenoid valve side connector terminals.
Standard value: 25 - 30 Ω [at 20°C (68°F)]
Is the measured resistance between 25 and 30 Ω [at 20°C (68°F)]?
Go to Step 3.
Replace the fuel tank solenoid valve. Then go to Step 6.
 
STEP 3. Check of short to power supply, open circuit and harness damage in FTS+ line between fuel tank solenoid valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 6.
 
STEP 4. Check of open circuit and harness damage in ground line between fuel tank solenoid valve connector and ground.
Is the harness wire in good condition?
Go to Step 5.
Repair the connector(s) or wiring harness. Then go to Step 6.
 
STEP 5. Using scan tool (M.U.T.-IIISE), check evaporative emission system component test item 5 and 6: Fuel Tank Solenoid Valve.
(1) Turn on the power supply mode of the electric motor switch.
(2) Check the following items in the evaporative emission system component test. Refer to Evaporative Emission System Component Test Reference Table .
  1. Item 5: Sealing Valve Solenoid ON
  2. Item 6: Sealing Valve Solenoid OFF
(3) Turn off the power supply mode of the electric motor switch.
Is the solenoid operating properly?
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 6.
 
STEP 6. 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 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P2420 set?
Retry the troubleshooting.
The inspection is complete.