Diagnostic procedure

DTC P0441 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED Have the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (Evaporative emission system related) been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Check for related Service Bulletins and/or online repair information availability. Is any related repair information available?	Yes	Perform the repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE OR STORED DTCS Turn the ignition switch off then to the ON position (Engine off). Verify related pending code or stored DTCs. Is DTC P0443 present?	Yes	Go to the appropriate DTC inspection.
3		No	Go to the next step.
4	DETERMINE IF LEAK CONCERN OR BLOCKAGE CONCERN Perform the evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION ). Does the system inspection fail?	Yes	Go to Step 6.
4		No	Go to the next step.
5	INSPECT IF PURGE SOLENOID VALVE STUCK CLOSED Inspect if the purge solenoid valve is stuck closed. (See PURGE SOLENOID VALVE INSPECTION ). Is the purge solenoid valve normal?	Yes	Inspect the following parts for clogging. Vacuum hoses between the intake manifold to the charcoal canister Catch tank Charcoal canister Repair or replace the part, then go to Step 11.
5		No	Replace the purge solenoid valve, then go to Step 11.
6	LOCATE LEAK POINT Inspect the following for leakage using the ultrasonic leak detector. Charcoal canister Catch tank Fuel filler cap EVAP hoses and pipes Fuel tank Is leakage found?	Yes	Repair leakage or replace the part, then go to Step 10.
6		No	Go to the next step.
7	INSPECT EVAP SYSTEM LEAK DETECTION PUMP Connect all disconnected connectors and hoses. Place a clamp on the EVAP system leak detection pump hose between the EVAP system leak detection pump and air filter. Perform the evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION ). Does the test result fail (red light turns on)?	Yes	Go to Step 9.
7		No	Go to the next step.
8	CONFIRM EVAP SYSTEM LEAK DETECTION PUMP LEAKAGE Remove the clamp. Perform the evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION ). Does the test result fail (red light turns on)?	Yes	Replace the EVAP system leak detection pump, then go to Step 10.
8		No	Go to the next step.
9	INSPECT FUEL PUMP UNIT INSTALLATION Remove the fuel tank. Visually inspect for damage, insufficient sealing or a poorly installed pump unit. Is it normal?	Yes	Go to the next step.
9		No	Repair or replace the fuel tank or sealing, then go to the next step.
10	PERFORM LEAK INSPECTION Connect all disconnected connectors and hoses. Perform the evaporative system leak inspection. (See EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK INSPECTION ). Does the test result fail (red light turns on)?	Yes	Leakage still exists. Locate leak the point and repair. Then go to the next step.
10		No	Go to the next step
11	VERIFY TROUBLESHOOTING OF DTC P0441 COMPLETED Start the engine and let it idle. Clear the DTC using the WDS or equivalent. Turn the ignition switch off. Perform the "EVAP System Repair Verification Drive Mode". (See OBD-II DRIVE MODE ) Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step.
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ). Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE ).
12		No	Troubleshooting completed.