DTC Description

In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum. Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow are adequate. If not, a malfunction is determined.

Courtesy of NISSAN NORTH AMERICA, INC.

DTC DETECTION LOGIC 

POSSIBLE CAUSE 

• EVAP canister purge volume control solenoid valve stuck closed
• EVAP control system pressure sensor and the circuit
• Loose, disconnected or improper connection of rubber tube
• Blocked rubber tube
• Cracked EVAP canister
• EVAP canister purge volume control solenoid valve circuit
• Accelerator pedal position sensor
• Blocked purge port
• Blocked purge line
• EVAP canister vent control valve
• EVAP control system pressure sensor removed

FAIL-SAFE 

Not applicable

DTC CONFIRMATION PROCEDURE 

1. PRECONDITIONING 

   If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

   Will CONSULT be used?

   >>

   GO TO 2.

   >>

   GO TO 5.

2. PERFORM DTC CONFIRMATION PROCEDURE-1 

   With CONSULT TESTING CONDITION: Always perform test at a temperature of 5°C (41°F) or more.

   1. Start the engine and warm it up to normal operating temperature.
   2. Turn ignition switch OFF and wait at least 10 seconds.
   3. Turn ignition switch ON.
   4. Turn ignition switch OFF and wait at least 10 seconds.
   5. Start engine and let it idle for at least 70 seconds.
   6. Select "PURG FLOW P0441" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode of "ENGINE" using CONSULT.
   7. Touch "START".

   Is "COMPLETED" displayed on CONSULT screen?

   >>

   GO TO 4.

   >>

   GO TO 3.

3. PERFORM DTC CONFIRMATION PROCEDURE-2 

   When the following conditions are met, "TESTING" will be displayed on the CONSULT screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take at least 35 seconds.)

   Selector lever	Suitable position
   VHCL SPEED SE	32 - 120 km/h (20 - 75 MPH)
   ENG SPEED	500 - 3, 300 rpm
   B/FUEL SCHDL	1.0 - 6.5 msec
   COOLANT TEMP/S	More than 0°C (32°F)

   CAUTION:

   Always drive vehicle at a safe speed.

   NOTE: If "TESTING" does not change for a long time, retry from step 2.

   Is "COMPLETED" displayed on CONSULT screen?

   >>

   GO TO 4.

   >>

   Perform DTC CONFIRMATION PROCEDURE again. GO TO 2.

4. PERFORM DTC CONFIRMATION PROCEDURE-3 

   Touch "SELF-DIAG RESULTS".

   Is "OK" displayed on CONSULT screen?

   >>

   To check malfunction symptom before repair: Refer to Intermittent Incident .

   >>

   Confirmation after repair: INSPECTION END

   >>

   Proceed to Diagnosis Procedure .

5. PERFORM COMPONENT FUNCTION CHECK 
   NOTE: Use component function check to check the overall monitoring function of the EVAP control system purge flow monitoring. During this check, a 1st trip DTC might not be confirmed.

   With GST

   1. Lift up drive wheels.
   2. Start engine (VDC switch OFF) and warm it up to normal operating temperature.
   3. Turn ignition switch OFF and wait at least 10 seconds.
   4. Start engine and wait at least 70 seconds.
   5. Set voltmeter probes to ECM harness connector terminals as per the following.

      ECM
      Connector	+	-
      	Terminal
      E16	131	158

   6. Check EVAP control system pressure sensor value at idle speed and note it.
   7. Establish and maintain the following conditions for at least 1 minute.

      Air conditioner switch	ON
      Headlamp switch	ON
      Rear window defogger switch	ON
      Engine speed	Approx. 3, 000 rpm
      Selector lever position	Any position other than P, N or R

   8. Verify that EVAP control system pressure sensor value stays 0.1 V less than the value at idle speed (measured at step 6) for at least 1 second.

   Is the inspection result normal?

   >>

   To check malfunction symptom before repair: Refer to Intermittent Incident .

   >>

   Confirmation after repair: INSPECTION END

   >>

   Proceed to Diagnosis Procedure .