FUEL CUT CONTROL (AT NO LOAD AND HIGH ENGINE SPEED) If the engine speed is above 1,800 rpm under no load (for example, the selector lever position is neutral and engine speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.
In addition, to protect the engine, the maximum engine speed is restricted to 5,000 rpm when no load is applied.
NOTE：
This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System, System Description (GT-R certified NISSAN dealer).
FUEL CUT WHEN STARTING THE ENGINE WITH THE ACCELERATOR PEDAL FULLY DEPRESSED
When intending to start the engine with the accelerator pedal fully depressed, to eliminate moisture from fuel on the spark plugs, the fuel is cut during cranking and the engine does not start. The fuel is continuously cut until the accelerator pedal is released.
ENGINE SPEED CUTTING CONTROL
The ECM receives the engine oil temperature signals from the engine oil temperature sensor and performs the engine speed cut control, to protect the engine at less than 0°C (32°F) and more than 135°C (275°F) engine oil temperature. The ECM controls the electric throttle control actuator and restricts the maximum engine speed to 4,000 rpm. This control is cancelled when the engine oil temperature is in the optimum temperature range.
NOTE：
If an engine oil temperature sensor deteriorates, the characteristic of sensor changes. In such cases, the engine speed cut control temperature may also change. Perform the engine oil temperature sensor inspection to check the deterioration of the engine oil temperature sensor. Refer to Component Inspection (GT-R certified NISSAN dealer).
BOOST RESTRICTION CONTROL
The ECM receives the engine coolant temperature signals from the engine coolant temperature sensor and performs the boost restriction control, to protect the engine at more than 110°C (230°F) engine coolant temperature. The ECM controls the turbocharger boost control solenoid valve, lowers the boost, and decreases the engine power. This control is cancelled when the engine coolant temperature is in the optimum temperature range.
NOTE：
The boost varies depending on the vehicle and driving conditions.