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.
  
  Fig 1: Locating EVAP Canister & Service Port
  Courtesy of NISSAN MOTOR CO., U.S.A.
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: Displaying CONSULT-II ACTIVE TEST Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Vacuum Exitence
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
1. OK >. GO TO 7 .
2. NG: GO TO 4 .
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.
  
  Fig 4: Locating EVAP Canister & Service Port
  Courtesy of NISSAN MOTOR CO., U.S.A.
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.
  
  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 .
  
  Fig 5: Checking EVAP Purge Hose And Purge Port
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Blow air into each hose and EVAP purge port C .
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.
  
  Fig 6: Displaying CONSULT-II ACTIVE TEST Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
1. OK: GO TO 8 .
2. NG: GO TO 7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

Fig 7: Checking Air Passage Of EVAP Canister With CONSULT-II Conditions
Courtesy of NISSAN MOTOR CO., U.S.A.

With CONSULT-II

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

Fig 8: Checking Air Passage Of EVAP Canister With 12V Direct Current Conditions
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 8.
2. NG: Replace EVAP canister purge volume control solenoid valve.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR HOSE
1. Turn ignition switch OFF.
2. Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.
  OK or NG
1. OK: GO TO 9.
2. NG: Repair it.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
  
  Fig 9: Checking EVAP Control System Pressure Sensor Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check connectors for water.
  Water should not exist.
  
  OK or NG
1. OK: GO TO 10.
2. NG: Replace EVAP control system pressure sensor.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Refer to DTC CONFIRMATION PROCEDURE and DTC CONFIRMATION PROCEDURE .

OK or NG
1. OK: GO TO 11.
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 12.
2. NG: Clean the rubber tube using an air blower.
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
  
  Fig 10: Checking EVAP Canister Vent Control Valve-I
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
1. OK: GO TO 13.
2. NG: Replace EVAP canister vent control valve.
CHECK EVAP CANISTER VENT CONTROL VALVE-II
Without CONSULT-II
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform VENT CONTROL/V in ACTIVE TEST mode.
4. Check air passage continuity and operation delay time.
  
  Fig 11: Checking EVAP Canister Vent Control Valve-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
With CONSULT-II

Check air passage continuity and operation delay time under the following conditions.

Fig 12: Checking Air Passage Continuity Of EVAP Canister
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 15 .
2. NG: GO TO 14.
CHECK EVAP CANISTER VENT CONTROL VALVE-III
1. Clean the air passage (Portion A to B ) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 13 again.
  OK or NG
1. OK: GO TO 15.
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 16.
2. NG: Replace it.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
1. : GO TO 17.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. : INSPECTION END