Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

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. 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.
  
  Fig 1: Conditions For Vacuum
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Displaying Active Test Screen
  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. For the location of EVAP service port, refer to EVAPORATIVE EMISSION LINE DRAWING .
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.
  1. Vacuum should exist.
6. Release the accelerator pedal fully and let engine idle. Vacuum should not exist.
  1. 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 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 3: Checking EVAP Purge Hose And 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.
  
  Fig 4: Checking Air Flows Freely
  Courtesy of NISSAN MOTOR CO., U.S.A.
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.
Fig 5: Displaying Active Test Screen
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to COMPONENT INSPECTION .

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.
  1. 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 EC-354, P0453 EC-361.

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