Diagnosis Procedure

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

   Is the inspection result normal? 

   YES-1: With CONSULT-III: GO TO 2.

   YES-2: Without CONSULT-III: GO TO  3.

   NO: Replace EVAP canister.

With CONSULT-III 

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III.
4. Touch "Qd" and "Qu" on CONSULT-III screen to adjust "PURG VOL C/V" opening and check vacuum existence.
   VACUUM REFERENCE
   
   

   PURG VOL C/V	Vacuum
   100%	Existed
   0%	Not existed

   Is the inspection result normal? 

   YES: GO TO  7.

   NO: 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 at EVAP service port and install vacuum gauge. For the location of EVAP service port, refer to "EVAPORATIVE EMISSION SYSTEM : SYSTEM DIAGRAM ".
4. Start engine and let it idle.

   Do not depress accelerator pedal even slightly. 

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

   Vacuum should not exist. 

6. Revving engine up to 2, 000 RPM after 100 seconds passed after starting engine.

   Vacuum should exist. 

   Is the inspection result normal? 

   YES: GO TO  7.

   NO: GO TO 4.

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

   Refer to "EVAPORATIVE EMISSION SYSTEM : SYSTEM DIAGRAM ".

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: 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 1: Identifying EVAP Canister Purge Volume Control Solenoid Valve And EVAP Service Port

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

   Is the inspection result normal? 

   YES-1: With CONSULT-III: GO TO 6.

   YES-2: Without CONSULT-III: GO TO  7.

   NO: Repair or clean hoses and/or purge port.

   Fig 2: Checking Free Flow Of Air In Intake Manifold

   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.

   Does engine speed vary according to the valve opening? 

   YES: GO TO  8.

   NO: GO TO 7.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 8.

NO: 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. 

   Is the inspection result normal? 

   YES: GO TO 9.

   NO: Replace EVAP control system pressure sensor.

Refer to "DTC LOGIC " for DTC P0452, "DTC LOGIC " for DTC P0453.

Is the inspection result normal? 

YES: GO TO 10.

NO: Replace EVAP control system pressure sensor.

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

   Is the inspection result normal? 

   YES: GO TO 11.

   NO: Clean the rubber tube using an air blower.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 12.

NO: Replace EVAP canister vent control valve.

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

Refer to "EVAPORATIVE EMISSION SYSTEM : SYSTEM DIAGRAM ".

Is the inspection result normal? 

YES: GO TO 13.

NO: Replace it.

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

GO TO 14.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END