The advantages of electronic fuel injection control are as follows:
- a) self-diagnosis of the engine power supply system, which allows for quick detection of a malfunction. The system registers emerging faults and if the engine is not operating satisfactorily, it is recommended to contact a workshop where the registered fault codes will be read using a special tester. These faults can then be purposefully eliminated;
- b) precise dosing of the volume of injected fuel, which reduces fuel consumption while maintaining good dynamic qualities of the car;
- c) reduction of the content of harmful substances in the exhaust gases due to the precise volume of injected fuel and the use of a catalyst.
All engine management system components are designed for long service life and require virtually no repairs. Maintenance only requires replacing the replaceable air filter element and fuel filter. Adjustments and repairs that affect the operation of a diesel engine are only possible with expensive control and measuring devices, so they should be entrusted to workshops that have the appropriate equipment.
Adjustment of idle speed and engine speed limited by the governor is not required as part of maintenance.
1.0. Diesel engine fuel system:
1 - fuel injector with needle lift sensor
2 - EGR valve
3 - boost air pressure reducing valve
4 - injector needle lift sensor plug
5 - crankshaft position/engine speed sensor plug
6 - engine oil temperature sensor
7 - main fuse and relay block. The injection system control unit, injection system relay and glow plug fuse are also located here
8 - intake manifold flap control valve (only for cars with AFB, AKN engine)
9 - Crankshaft position/engine speed sensor
10 - intake manifold air pressure sensor
11 - boost pressure regulator and intake manifold flap control valve (only for cars with AFB, AKN engine), throttle position controller (only for cars with AKE, AYM, BFC, BCZ, BAU engines)
12 - high pressure fuel pump (HPFP)
13 - coolant temperature sensor
14 - mass air flow sensor and intake air temperature sensor
The following details are not shown in the illustration:
A - Brake light switch sensor and brake pedal position sensor
B - accelerator pedal position sensor
C - preheating relay
D - fuel pump relay
E - power supply system relay
Attention! Cars with BCZ engine are not equipped with injector needle lift sensor.