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Diagnosis 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: Identifying EGR Volume Control Valve And Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between EGR volume control valve terminals 2, 5 and ground with CONSULT-III 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 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- 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.

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

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check harness continuity between ECM terminals and EGR volume control valve terminals as follows.

Refer to WIRING DIAGRAM .

TERMINALS REFERENCE CHART

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

Continuity should exist.

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.

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