- at a temperature of -30°С - 24.0-27.2
- at a temperature of 20°C - 2.35-2.55
- at a temperature of 100°C - 0.180-0.186
Coolant temperature sensor resistance, kOhm
- at a temperature of 25°C - 2.14-2.36
- at a temperature of 80°C - 0.27-0.29
Accelerator pedal position sensor resistance between pins 3 and 5) (1st channel), Ohm - 1200
Accelerator pedal position sensor resistance (between pins 2 and 6) (2nd channel), Ohm - 1700
Nozzle winding resistance at 20°С, Ohm — 0.33
Resistance of the fuel temperature sensor at a temperature of 25°C, kOhm - 2.05
Resistance of the fuel pressure regulator at a temperature of 20°C, kOhm - about 5
Resistance of the crankshaft angle sensor, Ohm - 720-880
Throttle servo resistance at a temperature of 25°, Ohm - 43-49
General information
High pressure direct injection fuel system with rail «Common Rail» consists of sensors that determine the state of the engine, an electronic engine control unit (engine-ECU), which performs control functions based on sensor signals, and actuators operating on commands from the control unit.
The electronic engine control unit controls the amount of fuel injected (fuel supply), injection advance angle and idle speed of the diesel engine depending on its condition. In addition, the electronic control unit has a self-diagnostic function that simplifies troubleshooting.
Direct injection control
The moment of opening of the injector and the time during which the injector is open and fuel is injected are regulated so that a strictly defined amount of fuel is supplied to the engine, which varies in accordance with constantly changing engine operating modes. Each cylinder has one injector. Fuel, under low pressure, is supplied by an electrically driven fuel pump from the fuel tank to the high pressure fuel pump. The fuel pressure required for injection is created by the high pressure fuel pump, from where the fuel is supplied through the high pressure pipes to the fuel rail «Common Rail» and on to the fuel injectors.
Self-diagnosis function
- If a malfunction occurs in the operation of one of the sensors or actuators, the engine malfunction indicator lamp lights up in the instrument cluster, warning the driver about the malfunction.
- If a malfunction is detected in any sensor or actuator, a diagnostic code appears that corresponds to the detected malfunction.
- The corresponding current data on sensors and actuators are stored in the RAM of the electronic engine control unit, and they can be read using the MUT-II device. Moreover, executive devices under certain conditions can be forced into action.
Other control functions
1. Air conditioning relay control.
Engages and disengages the A/C compressor magnetic clutch.
2. Diesel engine pre-heating system control.
3. Fan control
The operating speeds of the cooling system fans and the air conditioning condenser vary depending on the coolant temperature and vehicle speed.
4. Control of the exhaust gas recirculation system
5. Throttle control
The throttle control solenoid controls the vacuum applied to the throttle actuator to open/close the throttle.
6. Boost pressure control
The side compressor damper control solenoid controls the vacuum applied, which regulates the boost pressure.
7. Start-up control system.