Diagnostic Procedure

CHECK EVAP CANISTER
1. Turn ignition switch OFF.
2. Check EVAP canister for cracks.
OK or NG
1. OK (With CONSULT-II): GO TO 2.
2. OK (Without CONSULT-II): GO TO 3.
3. NG: Replace EVAP canister.
CHECK PURGE FLOW
With CONSULT-II
1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge.
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.
  
  Fig 2: Identifying Active Test Mode Of Consult-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Vacuum Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 12.
CHECK PURGE FLOW
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.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum gauge indication when revving engine up to 2, 000 RPM.
  Vacuum should exist.
6. Release the accelerator pedal fully and let idle.
  Vacuum should not exist.
  
  Fig 4: Identifying EVAP Service Port
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 4.
CHECK EVAP PURGE LINE
1. Turn ignition switch OFF.
2. Check EVAP purge line for improper connection or disconnection.
  Refer to "EVAPORATIVE EMISSION LINE DRAWING ".
OK or NG
1. OK: GO TO 5.
2. NG: Repair it.
CHECK EVAP PURGE HOSE AND PURGE PORT
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 5: Checking EVAP Purge Hose & Purge Port
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check that air flows freely.
OK or NG
1. OK (With CONSULT-II): GO TO 6.
2. OK (Without CONSULT-II): GO TO 7.
3. NG: Repair or clean hoses and/or purge port.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
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
1. OK: GO TO 8.
2. NG: GO TO 7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to DTC P0444, P0445: EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE .

OK or NG
1. OK: GO TO 8.
2. NG: Replace EVAP canister purge volume control solenoid valve.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
  Water should not exist
OK or NG
1. OK: GO TO 9.
2. NG: Replace EVAP control system pressure sensor.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Refer to DTC Confirmation Procedure for DTC P0452: EVAP CONTROL SYSTEM PRESSURE SENSOR and DTC P0453: EVAP CONTROL SYSTEM PRESSURE SENSOR .

OK or NG
1. OK: GO TO 10.
2. NG: Replace EVAP control system pressure sensor.
CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
1. OK: GO TO 11.
2. NG: Clean the rubber tube using an air blower.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 12.
2. NG: Replace EVAP canister vent control valve.
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

Refer to "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG
1. OK: GO TO 13.
2. NG: Replace it.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
1. GO TO 14.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. INSPECTION END