Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

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.

CHECK EOT SENSOR POWER SUPPLY CIRCUIT

Disconnect engine oil temperature (EOT) sensor harness connector.
Turn ignition switch ON.
Check the voltage between EOT sensor harness connector and ground.

VOLTAGE SPECIFICATION

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

Fig 1: Checking Voltage Between EOT Sensor Harness Connector And Ground

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

Is the inspection result normal?

YES: GO TO 3.

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

CHECK EOT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between EOT sensor harness connector and ECM harness connector.

CONTINUITY CHART

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

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.

CHECK ENGINE OIL TEMPERATURE SENSOR
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 5.

NO: Replace engine oil temperature sensor.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

: INSPECTION END