Diagnostic Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
   Fig 1: Loosening & Retightening Ground Screws

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

OK or NG

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

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

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between EGR temperature sensor terminal 2 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 2 & Ground

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

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect TCM harness connector
4. Check harness continuity between EGR temperature sensor terminal 1 and ECM terminal 67, TCM terminal 42.

   Refer to WIRING DIAGRAM .

   • Continuity should exist. 
5. Also check harness for short to ground and short to power.

OK or NG

• OK: GO TO  5.
• NG: GO TO 4.

Check the following.

• Harness connectors E19, F33
• Harness for open or short between TCM and EGR temperature sensor
• Harness for open or short between ECM and EGR temperature sensor

• : 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 6.
• NG: Replace EGR temperature sensor.

Refer to "COMPONENT INSPECTION ".

OK or NG

• OK: GO TO 7.
• NG: Replace EGR volume control valve.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

• :INSPECTION END