Diagnostic Procedure

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.
  Fig 2: Checking Voltage Between EGR Volume Control Valve Terminals 2, 5 & Ground

  Courtesy of NISSAN MOTOR CO., U.S.A.

Check the following.

• Harness connectors E22, F35
• 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

• Repair harness or connectors.

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 - EGRC1 .
   A/F SENSOR AND EGR VOLUME CONTROL VALVE CONNECTION
   
   

   ECM terminal	EGR volume control valve
   17	6
   18	3
   19	4
   20	1

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG

• OK: GO TO  4.
• NG: Repair open circuit or short to ground or short to power in harness or connectors.

Refer to COMPONENT INSPECTION .

OK or NG

• OK: GO TO  5.
• NG: Replace EGR volume control valve.

Refer to COMPONENT INSPECTION .

OK or NG

• OK: GO TO  6.
• NG: Replace EGR temperature sensor.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

• INSPECTION END