Diagnostic Procedure

CHECK VACUUM HOSE
Check vacuum hose for clogging, cracks or improper connection.

Fig 1: Checking Vacuum Hoses
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "VACUUM HOSE DRAWING ".

OK or NG
1. OK (With CONSULT-II): GO TO 2.
2. OK (Without CONSULT-II): GO TO 3.
3. NG: Repair or replace vacuum hose.
CHECK EGRC SOLENOID VALVE CIRCUIT
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.
  
  Fig 2: Scan Tool Display - Active Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
Clicking noise should be heard.

OK or NG
1. OK: GO TO 5.
2. NG: GO TO 4.
CHECK EGRC SOLENOID VALVE CIRCUIT
Without CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect EGRC solenoid valve harness connector.
3. Turn ignition switch ON.
4. 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.)
OK or NG
1. OK: GO TO 6.
2. NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E43, M65
- Harness connectors M59, F27
- Fuse block (J/B) connector E49
- 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 5.
2. NG: Repair open circuit or short to power in harness or connector.
CHECK EGRC-SOLENOID VALVE
With CONSULT-II
1. Perform "EGRC SOLENOID VALVE" in "ACTIVE TEST" mode.
2. Check air passage continuity and operation delay time under the following conditions.
Fig 3: Air Passage Continuity Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Checking Air Passage Continuity - Active Test
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 7.
2. NG: Replace EGRC solenoid valve.
CHECK EGRC-SOLENOID VALVE
Without CONSULT-II
1. Check air passage continuity and operation delay time under the following conditions.
Fig 5: Air Passage Continuity Inspection Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 6: Checking Air Passage Continuity
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 7.
2. NG: Replace EGRC solenoid valve.
CHECK EGR VALVE
- Apply vacuum to EGR vacuum port with a hand vacuum pump. EGR valve spring should lift.
- Check for sticking.
OK or NG
1. OK: GO TO 8.
2. NG: Replace EGR valve.
CHECK EGRC-BPT VALVE
1. Plug one of two ports of EGRC-BPT valve.
2. Vacuum from the other port and check for leakage while applying a pressure above 0.981 kPa (100 mmH2 O, 3.94 inH2 O) from under EGRC-BPT valve.
3. If a leakage is noted, replace the valve.
OK or NG
1. OK: GO TO 9.
2. NG: Replace EGRC-BPT valve.
CHECK EGR TEMPERATURE SENSOR
Check resistance change and resistance value.

Fig 9: Checking EGR Temperature Sensor Resistance Change And Resistance Value
Courtesy of NISSAN MOTOR CO., U.S.A.

< Reference data >

Fig 10: Voltage/Resistance Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 11: Temperature/Resistance Graph
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 10.
2. NG: Replace EGR temperature sensor.
CHECK INTERMITTENT INCIDENT
Perform , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. : INSPECTION END.