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DTC P04E0: Evaporative Emission Control System Purge Control Valve Stuck Close
 
 
 
 
CIRCUIT OPERATION
  • Refer to DTC P0458 - Evaporative Emission Control System Purge Control Valve Circuit Low Input .
 
 
TECHNICAL DESCRIPTION
  • During the key-off evaporative leakage monitoring, when evaporative emission canister pressure does not become atmospheric pressure at opening to atmosphere with opened evaporative emission purge solenoid, it is judged as evaporative emission purge solenoid stuck close.
 
 
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 canister pressure subtracted from the barometric pressure is more than 0.985 kPa (0.2909 in.Hg) for 20 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Prohibit introduction of purges
 
 
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:)
  • Purge line is clogged.
  • Evaporative emission purge solenoid stuck closed.
  • Open or shorted evaporative emission purge solenoid 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 P0458 or P0459 set?
Refer to DTC P0458 - Evaporative Emission Control System Purge Control Valve Circuit Low Input , DTC P0459 - Evaporative Emission Control System Purge Control Valve Circuit High Input .
Go to Step 2.
 
STEP 2. Check the evaporative emission purge solenoid for clogs.
Refer to GROUP 17, Emission Control - Evaporative Emission Control System - evaporative emission purge solenoid Check .
Is there ventilation of the evaporative emission purge solenoid?
Go to Step 3.
Replace the evaporative emission purge solenoid. Then go to Step 7.
 
STEP 3. Check of harness damage in PURG line between evaporative emission purge solenoid 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 7.
 
STEP 4. Check of harness damage in power supply line between MFI relay connector and evaporative emission purge solenoid connector.
Is the harness wire in good condition?
Go to Step 5.
Repair the connector(s) or wiring harness. Then go to Step 7.
 
STEP 5. Check piping clogging between the evaporative emission purge solenoid and bypass valve.
(1) Disconnect the shown pipe in the bypass valve.
(2) Disconnect the shown hose from evaporative emission purge solenoid 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 6.
Repair the hose(s) or pipe(s). Then go to Step 7.
 
STEP 6. 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 196, Purge Valve Stuck Closed 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 7.
 
STEP 7. 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) Read the diagnostic trouble code.
Is DTC P04E0 set?
Retry the troubleshooting.
The inspection is complete.