DTC P0441-00: Evaporative emission control system incorrect purge flow

TECHNICAL DESCRIPTION

While the engine is running, close the switching valve built into the Evaporative Leak Check Module (ELCM), and detect the purge function failure from the pressure change in the evaporative emission canister when the purge is forcibly introduced by opening the evaporative emission purge solenoid.

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)

Barometric pressure sensor monitor
Barometric pressure sensor/Manifold absolute pressure correlation
Evaporative emission purge solenoid monitor
Bypass valve monitor
Fuel tank solenoid valve monitor
Switching valve monitor
Canister pressure sensor monitor
Fuel tank pressure sensor monitor

Sensor (The sensor below is determined to be normal)

Mass airflow sensor
Engine coolant temperature sensor
Intake air temperature sensor
Barometric pressure sensor
Throttle position sensor
Manifold absolute pressure sensor

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

Engine coolant temperature is higher than 20°C (68°F).
Intake air temperature is higher than 5°C (41°F) and lower than 55°C (131°F).
Mass airflow sensor output is 10 g/sec (0.35 oz./sec) or more.
The ratio between the manifold absolute pressure and the barometric pressure is less than 0.96.
The closed loop air-fuel control continues for 20 seconds or more.
12V battery positive voltage is 11.0 volts or higher.
Engine is running.
Bypass valve is not driving.
More than 1 second has elapsed after the above mentioned conditions have been met.
While engine is running, following condition is not even met once: intake air temperature is 5°C (41°F) or lower, or 55°C (131°F) or higher.

Judgment Criterion

For 5 seconds, the canister pressure subtracted from the barometric pressure is less than 0.27 kPa (0.080 in.Hg) with the evaporative emission purge solenoid driving.

FAIL-SAFE AND BACKUP FUNCTION

Fuel filler lid cannot be opened even when pressing the fuel filler lid opener switch.
Prohibit introduction of purges.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 2 OBD- II DRIVE CYCLE

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

Evaporative emission canister is clogged.
Purge line seal failed.
Purge line is clogged.
Evaporative emission purge solenoid stuck closed.
Bypass valve [built into the evaporative emission canister (main)] tuck closed.
Fuel tank solenoid valve stuck open.
Switching valve (built into the ELCM) stuck open.
Canister pressure sensor (built into the ELCM) is stuck.
Evaporative emission purge solenoid harness damage, or connector damage.
ELCM circuit harness damage, or connector damage.
ECM failed.

DIAGNOSIS

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long

1.STEP 1. Check the evaporative emission purge solenoid for clogs.

Check the evaporative emission purge solenoid for stuck closed (Refer to ENGINE – Engine, Motor and Emission Control, Emission Control, Evaporative Emission System EVAPORATIVE EMISSION PURGE SOLENOID CHECK

Q: Is the check result normal?

Replace the evaporative emission purge solenoid (Refer to ENGINE – Intake and Exhaust, Intake Manifold INTAKE MANIFOLD REMOVAL AND INSTALLATION

2.STEP 2. Check the installation state of the vacuum hose, tube and pipe between the evaporative emission purge solenoid and fuel tank solenoid valve.

Q: Is the check result normal?

Repair it.

3.STEP 3. Check for leaks in hose A, hose B and hose C.

Use a hand vacuum pump to check hose A, hose B and hose C.

Q: Do the hoses hold vacuum?

Replace any damaged hose.

4.STEP 4. Check for leaks in tube D and Tube E.

Use a hand vacuum pump to check tube D and Tube E.

Q: Do the tubes hold vacuum?

Replace any damaged tube.

5.STEP 5. Check the fuel tank solenoid valve for leaks.

Check fuel tank solenoid valve itself (Refer to ENGINE, Engine, Motor and Emission Control – Emission Control – Evaporative Emission System FUEL TANK SOLENOID VALVE CHECK

Q: Does the fuel tank solenoid valve hold pressure?

Replace the fuel tank solenoid valve (Refer to ENGINE, Engine, Motor and Emission Control – Emission Control – Evaporative Emission System FUEL TANK SOLENOID VALVE REPLACEMENT

6.STEP 6. Check harness between evaporative emission purge solenoid connector terminal number 1 and ECM connector terminal number 14.

Check output line for damage.

Q: Is the check result normal?

Repair or replace the connector, or repair the damaged harness wire.

7.STEP 7. Check harness between IPDM E/R connector terminal number 66 and evaporative emission purge solenoid connector terminal number 2.

Check power supply line for damage.

Q: Is the check result normal?

Repair or replace the connector, or repair the damaged harness wire.

8.STEP 8. Check harness between IPDM E/R connector terminal number 78 and ELCM connector terminal number 8.

Check power supply line for damage.

Q: Is the check result normal?

Repair or replace the connector, or repair the damaged harness wire.

9.STEP 9. Check harness between ELCM connector terminal number 4 and ECM connector terminal number 80, check harness between ELCM connector terminal number 5 and ECM connector terminal number 117, check harness between ELCM connector terminal number 6 and ECM connector terminal number 107, and check harness between ELCM connector terminal number 7 and ECM connector terminal number 97.

Check signal line for damage.

Q: Are the check result normal?

Repair or replace the connector, or repair the damaged harness wire.

10.STEP 10. Test the OBD-II drive cycle after replacing the evaporative emission canister (main).

After replacing the evaporative emission canister (main) and erasing the DTC, carry out test drive with the drive cycle pattern, and recheck the DTC.

(1) Replace the evaporative emission canister (main) (Refer to ENGINE – Engine, Motor and Emission Control, Emission Control, Evaporative Emission System EVAPORATIVE EMISSION CANISTER REMOVAL AND INSTALLATION

(2) Use scan tool (M.U.T.-III SE) to erase the DTC.

(3) Carry out test drive with the drive cycle pattern (Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 2 OBD- II DRIVE CYCLE

(4) Use scan tool (M.U.T.-III SE) to recheck the DTC.

Q: Is DTC P0441-00 set?

Replace the ECM (Refer to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION

The inspection is complete.