Electrical Maintenance Precautions
1. Check the correct motor settings (see chapter "Maintenance and general inspection and adjustment procedures").
2. Use the battery as a power source for the stroboscope, tachometer, etc.
3. In case of engine misfiring, the following precautions should be taken.
- A) Wires must be secure. connected to the battery terminals.
- b) At the end of the repair work, make sure that all wires of the ignition system are correctly and securely connected.
- V) When cleaning the engine compartment, do not allow water to enter the electronic system components.
Precautions for Cars with a Mobile Radio System
Structurally electronic, the control unit is designed in such a way as to exclude the influence of external electromagnetic interference on it. However, if the vehicle is equipped with a radio, CB, etc. (even with an output power of only 10 W), then it may in some cases affect the operation of the electronic unit, especially when the antenna and connecting (feeder) cables are laid next to the electronic control unit. Therefore, the following precautions must be observed:
1. Install the antenna as far as possible from the electronic control unit. The unit is located under the dashboard, so the antenna must be installed at the rear of the car.
2. Lay the antenna cable as far as possible from the wiring of the electronic control unit, at least 20 cm, and even more so do not twist them together.
3. Check that the antenna cable and antenna are properly configured.
4. Do not install a powerful radio station on the car.
5. Do not open the cover or housing of the electronic control unit unless absolutely necessary (some pins can be damaged by static electricity).
Air System Precautions
1. Removing the oil dipstick, oil filler cap, hoses, etc. from a running engine. may cause engine misalignment.
2. Disconnection, loosening of fasteners or cracking of elements of the air supply system (between throttle body and cylinder head) will cause air leakage, which will lead to a malfunction of the engine.
Electronic Control Precautions
1. Before disconnecting the electrical connectors of the electronic control unit, it is necessary to turn off the electrical power using either the ignition key or by removing the wires from the battery terminals.
Attention: be sure to read the diagnostic code before removing the wires from the battery terminals.
2. When installing the battery, do not reverse the polarity.
3. Do not hit the elements of the fuel injection system and especially the electronic control unit.
4. Be careful when troubleshooting, with a large number of transistor circuits, even slight careless touching of the terminals can cause serious damage.
5. Do not open the housing cover of the electronic control unit.
6. When working in rainy weather, protect (electronic control units from water ingress. Also, you should do when washing the engine.
7. Replacement of spare parts should be carried out only with similar ones.
8. Be careful when disconnecting and connecting electrical wiring connectors.
- A) When disconnecting, loosen the lock by pushing on its spring and pull out the connector by holding it by the housing.
- b) When connecting, fully insert the connector and make sure it is locked (fixed).
9. When checking the connector with a tester.
- A) If the waterproof connector is being tested, the protective cover must be carefully removed.
- b) When testing resistance, current, or voltage, always insert the tester probe from the wire side.
- V) Do not use excessive force.
- G) After checking, firmly install the protective cover on the connector.
10. When checking injectors and their connectors, use special tools (special diagnostic cables).
Fuel System Precautions
1. Before starting work on the fuel system, disconnect the wire from the negative terminal of the battery.
Attention: any diagnostic code in the memory device of the electronic control unit is erased when the wire is removed from the negative terminal of the battery. Therefore, it is necessary to read the diagnostic codes before disconnecting the battery.
2. Do not smoke or use open flames when working on the fuel system.
3. Avoid contact of gasoline with rubber or leather items.
4. Relieve residual fuel pressure before working on fuel lines (see section "Fuel system").
5. The quick connector can be reconnected, but if you removed the holder from the fuel line, it must be replaced.
The holder must be replaced when:
- extraction from the fuel line;
- its damage;
- replacement of the fuel manifold;
- replacement of fuel lines;
- replacement of the fuel pump; replacement of the fuel filter;
- replacement of the fuel vapor filter;
- replacement of the fuel filler pipe;
- fuel tank replacement.
6. Observe the following when working with fuel line quick connectors.
- A) Make sure the connections are clean, clean them if necessary.
- b) Put a rag on the quick connector "A".
- V) Detach part "A" quick connector, lock the connector "IN" with one hand and squeeze the tube holder "WITH" freeing it from the locking foot with the other hand "D". Disconnect the connection.
Note:
- Don't damage the line "E" and other parts.
- Do not use special equipment.
- Do not remove the holder from the fuel line, after removing it, replace it with a new one.
- V) Check the quick coupling for dirt and damage.
- G) Place plastic bags over the ends of the fuel line to prevent damage and dirt from entering the fuel line.
7. Precautions when removing and installing injectors.
- A) Never reuse the O-ring.
- b) When installing the O-ring on the nozzle, be careful not to damage it in any way.
- V) Lubricate the O-ring with spindle oil or fuel prior to installation. Never use engine or transmission oil or brake fluid.
8. After servicing the fuel system, check that there are no fuel leaks.
Note: After working on the fuel system for a week, check the engine for leaks and fuel smell.