Diagnostic Procedure

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.
  Voltage: Battery voltage
OK or NG

OK: GO TO 3.

NG: GO TO 2.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E22, F35
- Harness for open or short between EGR volume control valve and IPDM E/R
: Repair harness or connectors.

CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminals and EGR volume control valve terminals as follows. Refer to WIRING DIAGRAM .

CONTINUITY REFERENCE

Continuity should exist .

OK or NG

OK: GO TO 4.

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

OK: GO TO 5.

NG: Replace EGR volume control valve.
CHECK EGR TEMPERATURE SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 6.

NG: Replace EGR temperature sensor.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END