Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check EVAP canister for cracks.

OK or NG 

OK (With CONSULT-III): GO TO 2.

OK (Without CONSULT-III): GO TO  3.

NG: Replace EVAP canister.

With CONSULT-III 

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP service port from EVAP service port. For the location of EVAP service port, refer to "DESCRIPTION ".
2. Install vacuum gauge between the vacuum hose and EVAP service port.
3. Start engine and let it idle.
4. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III.
5. Rev engine up to 2, 000 RPM.
6. Touch "Qd" and "Qu" on CONSULT-III screen to adjust "PURG VOL C/V" indication and check vacuum existence.

OK or NG 

OK: GO TO  7.

NG: GO TO  4.

Without CONSULT-III 

1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve and EVAP service port. For the location of EVAP service port, refer to "DESCRIPTION ".
4. Install vacuum gauge between the vacuum hose and EVAP service port.
5. Start engine and let it idle.

   Do not depress accelerator pedal even slightly  .

6. Check vacuum gauge indication before 60 seconds pass after starting engine.

   Vacuum should not exist  .

7. Rev engine up to 2, 000rpm after 100 seconds pass after starting engine.

Vacuum should exist  .

OK or NG 

OK: GO TO  7.

NG: GO TO 4.

1. Turn ignition switch OFF.
2. Check EVAP purge line for improper connection or disconnection.

Refer to "DESCRIPTION ".

OK or NG 

OK: GO TO 5.

NG: Repair malfunctioning part.

1. Disconnect purge hoses connected to EVAP service port (A) and EVAP canister purge volume control solenoid valve (B).
2. Blow air into each hose and EVAP purge port (C).
   Fig 1: Connecting Purge Hoses To EVAP Service Port And EVAP Canister Purge Volume Control Solenoid Valve

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check that air flows freely.

OK or NG 

OK (With CONSULT-III): GO TO 6.

OK (Without CONSULT-III): GO TO  7.

NG: Repair or clean hoses and/or purge port.

Fig 2: Checking Air Flow

Courtesy of NISSAN MOTOR CO., U.S.A.

With CONSULT-III 

1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve opening.

OK or NG 

OK: GO TO  8.

NG: GO TO 7.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 8.

NG: Replace EVAP canister purge volume control solenoid valve.

1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.

Water should not exist  .

OK or NG 

OK: GO TO 9.

NG: Replace EVAP control system pressure sensor.

Refer to "DTC CONFIRMATION PROCEDURE " for DTC P0452, "DTC CONFIRMATION PROCEDURE " for DTC P0453.

OK or NG 

OK: GO TO 10.

NG: Replace EVAP control system pressure sensor.

1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.

OK or NG 

OK: GO TO 11.

NG: Clean the rubber tube using an air blower.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 12.

NG: Replace EVAP canister vent control valve.

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

Refer to "DESCRIPTION ".

OK or NG 

OK: GO TO 13.

NG: Replace malfunctioning part.

Clean EVAP purge line (pipe and rubber tube) using air blower.

GO TO 14.

Refer to "DIAGNOSIS PROCEDURE ".

INSPECTION END