Fuel Supply System
The fuel from the fuel tank is pressured by the fuel pump and is accumulated in the common rail. Fuel injection timing and injection amount are controlled precisely by the ECM by sending the signal to the electromagnetic valve of each fuel injector.
Refer to the system diagram to see the functional layout of the system.
Glow Relay Control
It controls the timing and duration when the glow plug control module is electrically ON at the engine start in accordance with the coolant temperature.
Fuel Filter Water Level Switch
Fuel filter water level switch is installed fuel filter. This switch detects water level in the fuel filter.
Fuel heater is installed fuel filter.
This system is designed to prevent deposition of the wax elements in the fuel when the ambient temperature is extremely low.
Compact and energy-saving electromagnetic valve control type of the injectors are adopted on this model. Separate IQA code is given for each fuel injector, which allows much accurate fuel injection by controlling the fuel injection of each injector based on the respective injection performances.
Fuel Rail Pressure (FRP) Sensor
The FRP sensor detects the fuel pressure in the common rail.
Fuel Temperature Sensor
The fuel temperature sensor is installed fuel filter. The fuel temperature sensor is a temperature dependent resistor (thermistor). The resistance of the thermistor decreases as the fuel temperature increases.
PGM-FI Main Relay 1 and 2
PGM-FI main relay 1 is energized whenever the ignition switch is ON (II) which supplies battery voltage to the ECM, and power for PGM-FI main relay 2.
Fuel pump draws adequate amount of the fuel and sends the high pressured fuel to the common rail.