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 and install vacuum gauge. For the location of EVAP service port, refer to "SYSTEM DESCRIPTION ".
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III.
4. Rev engine up to 2, 000 RPM.
5. Touch "Qd" and "Qu" on CONSULT-III screen to adjust "PURG VOL C/V" opening and check vacuum existence.
   ACTIVE TEST MODE REFERENCE CHART
   
   

   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 "SYSTEM DESCRIPTION ".
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 "SYSTEM DESCRIPTION ".

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: Connecting To EVAP Service Port A And EVAP Canister Purge Volume Control Solenoid Valve B

   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 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.

Is the inspection result normal? 

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 (DRAIN FILTER) ".

Is the inspection result normal? 

YES: GO TO 12.

NO: Replace drain filter.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 13.

NO: Replace EVAP canister vent control valve.

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

Refer to "INSPECTION ".

Is the inspection result normal? 

YES: GO TO 14.

NO: Replace it.

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

GO TO 15.

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END