Figure 4.62. Location of fuel injection system components: 1 - Heated fuel filter; 2 - Support cylinder sensor; 3 - Solenoid valve for boost pressure regulation; 4 - Boost pressure sensor; 5 - Nozzle; 6 - Glow plug; 7 - Thermostat; 8 - Air flow meter with intake air temperature sensor; 9 - Fuel injection control unit; 10 - Damper with exhaust gas recirculation valve; 11 - Pressure regulator; 12 - High pressure fuel pump; 13 - Fuel temperature sensor.
Figure 4.63. Location of fuel injection system components: 1 - Nozzle; 2 - Fuel drain line; 3 - High pressure fuel lines.
Figure 4.64. Location of fuel injection system components: 4 - Pressure sensor; 5 - High pressure accumulator.
Figure 4.65. Location of fuel injection system components: 6 - High pressure accumulator/injection pump fuel supply line.
Figure 4.66. Location of fuel injection system components: 7 - Fuel injection pump; 8 - Pressure regulator.
Figure 4.67. Location of fuel injection system components: 9 - Support cylinder sensor.
Figure 4.68. Location of fuel injection system components: 10 - Turbocharger; 11 - Pre-catalyst.
Figure 4.69. Location of fuel injection system components: 12 - Damper; 13 - Exhaust gas recirculation valve.
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Figure 4.70. Location of fuel injection system components: 14 - Air flow meter with intake air temperature sensor.
Figure 4.71. Location of fuel injection system components: 15 - Boost pressure sensor.
Figure 4.72. Location of fuel injection system components: 16 - Pre-heating unit; 17 - Solenoid valve for boost pressure regulation.
Figure 4.73. Location of fuel injection system components: 18 - Fuel filter.
Vehicles equipped with diesel engines with a high-pressure CDI injection system are provided with a pre-heating indicator light, two injection system indicator lights and a coolant temperature indicator light, which are installed on the instrument panel.
The pre-heating indicator light is presented in the form of an orange coil with the inscription "Diesel preheating" (Pre-heating).
The first level injection system fault indicator light is represented by an orange sinusoidal curve with the message "Injection fault" (Injection system malfunction).
The second-level fault warning light of the injection system is represented by the engine with the red inscription "Stop" (Stop) along with the message "Switch off engine" (Turn off the engine).
The coolant temperature indicator light is represented by a thermometer with a message "Coolant temperature" (Coolant temperature).
Reasons for the signal light to come on
The preheating indicator light comes on when the ignition is switched on and remains on during the preheating phase and then goes out. In case of a level 1 fault, the panel displays "Injection system fault". These faults may be as follows:
- internal control unit failure;
- malfunction of the automatic engine blocking device;
- engine crankshaft speed synchronization malfunction;
- accelerator potentiometer malfunction;
- air flow meter malfunction;
- vehicle speed sensor malfunction;
- exhaust gas recirculation valve malfunction;
- malfunction of the boost pressure control solenoid valve;
- main relay failure;
- ignition key malfunction;
- injector malfunction;
- injector correction fault (iMA);
- sensor power supply failure.
In case of a level 2 malfunction, the indicator light with the inscription lights up "Switch off engine" (Turn off the engine). In this case, the car must be stopped immediately. These may be the following problems:
- internal control unit failure;
- injector malfunction;
- malfunction of the fuel pressure sensor in the high pressure accumulator;
- high pressure accumulator pressure regulator malfunction;
- engine speed synchronization malfunction.
When the engine overheats, the coolant temperature warning light comes on.
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