Diagnostic Procedure

CHECK EXHAUST SYSTEM
1. Start engine.
2. Check exhaust pipes and muffler for leaks.
OK or NG
1. OK (With CONSULT-II): GO TO 2.
2. OK (Without CONSULT-II): GO TO 3.
3. NG: Repair or replace exhaust system.
Fig 1: Checking Exhaust Pipes And Muffler For Leaks
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK VACUUM SOURCE TO EGR VALVE
With CONSULT-II
1. Warm engine up to normal operating temperature.
2. Disconnect vacuum hose to EGR valve.
3. Check for vacuum existence at idle.
  Vacuum should not exist at idle.
  
  Fig 2: Checking Vacuum Source To EGR Valve
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Select "EGRC SOLENOID VALVE" in "ACTIVE TEST" mode with CONSULT-II and turn the solenoid valve OFF.
5. Check for vacuum existence when revving engine from 2,000 RPM up to 4,000 RPM.
  Vacuum should exist when revving engine.
OK or NG
1. OK: GO TO 4.
2. NG: GO TO 5.
Fig 3: Scan Tool Display - Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK VACUUM SOURCE TO EGR VALVE
Without CONSULT-II
1. Warm engine up to normal operating temperature.
2. Disconnect vacuum hose to EGR valve.
3. Check for vacuum existence at idle.
  Vacuum should not exist at idle.
4. Disconnect EGRC solenoid valve harness connector. (The 1st trip DTC for EGRC solenoid valve will be displayed, but ignore it.)
5. Check for vacuum existence when revving engine from 2,000 RPM up to 4,000 RPM.
  Vacuum should exist when revving engine.
OK or NG
1. OK: GO TO 4.
2. NG: GO TO 5.
Fig 4: Disconnecting EGRC Solenoid Valve Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EGR VALVE
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 11.
2. NG: Repair or replace EGR valve.
CHECK VACUUM HOSE
1. Turn ignition switch OFF.
2. Check vacuum hose for clogging, cracks or improper connection.
OK or NG
1. OK (With CONSULT-II): GO TO 6.
2. OK (Without CONSULT-II): GO TO 7.
3. NG: Repair or replace vacuum hose.
Fig 5: Checking Vacuum Hose For Clogging
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EGRC SOLENOID VALVE OPERATION
With CONSULT-II
1. Turn ignition switch ON.
2. Turn EGRC solenoid valve "ON" and "OFF" in "ACTIVE TEST" mode with CONSULT-II and check operating sound.
  Clicking noise should be heard.
OK or NG
1. OK: GO TO 9.
2. NG: GO TO 8.
Fig 6: Scan Tool Display - Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK EGRC SOLENOID VALVE OPERATION
Without CONSULT-II

Check operating sound of the solenoid valve when disconnecting and reconnecting EGRC solenoid valve harness connector. (The DTC or the 1st trip DTC for the EGRC solenoid valve will be displayed, however, ignore it.)

Clicking noise should be heard.

OK or NG
1. OK: GO TO 9.
2. NG: GO TO 8.
CHECK EGRC SOLENOID VALVE CIRCUIT
1. Turn ignition switch "OFF".
2. Check the following.
- Harness connectors E43, M65
- Harness connectors M59, F27
- 10A fuse
- Harness for open or short between fuse block and EGRC solenoid valve
- Harness for open or short between ECM and EGRC solenoid valve
OK or NG
1. OK: GO TO 9.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK EGRC SOLENOID VALVE
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 10.
2. NG: Replace EGRC solenoid valve.
CHECK EGRC-BPT VALVE
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 11.
2. NG: Replace EGRC-BPT valve.
CHECK EGR TEMPERATURE SENSOR
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 12.
2. NG: Replace EGR temperature sensor.
CHECK INTERMITTENT INCIDENT
Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. : INSPECTION END.