Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK GROUND CONNECTION 
   1. Turn ignition switch OFF.
   2. Check ground connection E9. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

2. CHECK EOT SENSOR POWER SUPPLY CIRCUIT 
   1. Disconnect engine oil temperature (EOT) sensor harness connector.
   2. Turn ignition switch ON.
   3. Check the voltage between EOT sensor harness connector and ground.

      EOT sensor		Ground	Voltage
      Connector	Terminal
      F68	1	Ground	Approx. 5 V

      Fig 1: Checking Voltage Between EOT Sensor Terminal 1 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

3. CHECK EOT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
   1. Turn ignition switch OFF.
   2. Disconnect ECM harness connector.
   3. Check the continuity between EOT sensor harness connector and ECM harness connector.

      EOT sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F68	2	F13	52	Existed

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

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

4. CHECK ENGINE OIL TEMPERATURE SENSOR 

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Replace engine oil temperature sensor. Refer to "COMPONENT PARTS LOCATION ".

5. CHECK INTERMITTENT INCIDENT 

   Refer to "INTERMITTENT INCIDENT ".

   : INSPECTION END