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 EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EGR volume control valve harness connector.
3. Turn ignition switch ON.
  
  Fig 1: Disconnecting EGR Volume Control Valve Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between EGR volume control valve terminals 2, 5 and ground with CONSULT-II or tester.
  
  Fig 2: Checking Voltage Between EGR Volume Control Valve Terminals 2, 5 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Voltage: Battery voltage
OK or NG
1. OK: GO TO 3 .
2. NG: GO TO 2.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- IPDM E/R harness connector E122
- Harness for open or short between EGR volume control valve and IPDM E/R
- Harness for open or short between EGR volume control valve and ECM
  1. Repair harness or connectors.
CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and EGR volume control valve terminals as follows.
  Refer to WIRING DIAGRAM .
  
  Fig 3: Check Harness Continuity Between ECM And EGR
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 4.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK EGR VOLUME CONTROL VALVE
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 5.
2. NG: Replace EGR volume control valve.
CHECK EGR TEMPERATURE SENSOR
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 6.
2. NG: Replace EGR temperature sensor.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. INSPECTION END