Diagnostic Procedure

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

OK or NG 

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

OK (Without CONSULT-II) : GO TO  3.

NG : Replace EVAP canister.

With CONSULT-II 

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to , "EVAPORATIVE EMISSION LINE DRAWING ".
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II.
4. Rev engine up to 2, 000 rpm.
5. Touch "Qd" and "Qu" on CONSULT-II screen to adjust "PURG VOL CONT/V" opening and check vacuum existence.
   PURGE VOLUME CONTROL VALVE VACUUM
   
   

   PURG VOL CONT/V	Vacuum
   100%	Should exist.
   0%	Should not exist.

   Fig 1: Consult-II ACTIVE TEST Display Screen

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

OK or NG 

OK : GO TO  7.

NG : GO TO  4.

Without CONSULT-II 

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 at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to , "EVAPORATIVE EMISSION LINE DRAWING ".
4. Start engine and let it idle.

   Do not depress accelerator pedal even slightly. 

5. Check vacuum gauge indication before 60 seconds passed after engine starting engine.

   Vacuum should not exist. 

6. Revving engine up to 2, 000 rpm after 100 seconds passed 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 , "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG 

OK : GO TO 5.

NG : Repair it.

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 2: Checking EVAP Purge Hose And Purge Port

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

OK or NG 

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

OK (Without CONSULT-II) : GO TO  7.

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

Fig 3: Checking Air Flows Freely

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

With CONSULT-II 

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

OK or NG 

OK : GO TO  8.

NG : GO TO 7.

Fig 4: Consult-II ACTIVE TEST Display Screen

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

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 , P0453 DTC CONFIRMATION PROCEDURE .

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 , "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG 

OK : GO TO 13.

NG : Replace it.

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

: GO TO 14.

Refer to , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END