Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten four ground screws on the body.

   Refer to GROUND INSPECTION .

   Fig 1: Checking Ground Connections

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

OK or NG

• OK: GO TO  2.
• NG: Repair or replace ground connections.

1. Disconnect EGR temperature sensor harness connector.
2. Turn ignition switch ON.
   Fig 2: Disconnecting EGR Temperature Sensor Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between EGR temperature sensor terminal 1 and ground with CONSULT-II or tester.

   Voltage: Approximately 5V 

OK or NG

• OK: GO TO  3.
• NG: Repair or replace harness or connectors.
  Fig 3: Checking Voltage Between EGR Temperature Sensor Terminal 1 & Ground

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EGR temperature sensor terminal 2 and ECM terminal 67. Refer to WIRING DIAGRAM - EGR/TS .

   Continuity should exist. 

4. Also check harness for short to ground or 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 connector.

Refer to COMPONENT INSPECTION .

OK or NG

• OK: GO TO  5.
• NG: Replace EGR temperature sensor.

Refer to COMPONENT INSPECTION .

OK or NG

• OK: GO TO  6.
• NG: Replace EGR volume control valve.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

• INSPECTION END