1.CHECK GROUND CONNECTION

1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.

Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace ground connection.
2.CHECK ECT SENSOR POWER SUPPLY CIRCUIT

1. Disconnect engine coolant temperature (ECT) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between ECT sensor harness connector and ground.

   ECT sensor | Ground | Voltage (V)
   Connector | Terminal
   F51 | 1 | Ground | Approx. 5

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 ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ECT sensor harness connector and ECM harness connector.

   ECT sensor | ECM | Continuity
   Connector | Terminal | Connector | Terminal
   F51 | 2 | F101 | 26 | 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 COOLANT TEMPERATURE SENSOR
Refer to Component Inspection (GT-R certified NISSAN dealer).
Is the inspection result normal?
YES>>GO TO 5.
NO>>Replace engine coolant temperature sensor.
5.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END