Electrical Maintenance Precautions
1. Check the correct motor settings (see chapter "Maintenance and general inspection and adjustment procedures").
2 Precautions when connecting appliances.
A) Use the rechargeable battery as a power source for the strobe, tachometer, etc.
b) Connect the tachometer probe wire to the terminal "IG" (-) diagnostic socket.
3. In case of engine misfiring, take the following precautions.
A) The battery terminals must be securely connected to the battery terminals.
b) Handle high voltage wires with care.
V) At the end of the repair work, make sure that all wires of the ignition system are correctly and securely connected.
G) When cleaning the engine compartment, do not allow water to enter the electronic system components.
4. When working with an oxygen sensor:
A) Do not drop or impact the oxygen sensor;
b) Do not allow water to enter the oxygen sensor.
Air System Precautions
1. Removing the oil dipstick, oil filler cap, hoses, etc. from the engine may cause engine misalignment.
2. Disconnection, loose fasteners, or cracking of the air supply system will cause air to be sucked in, resulting in engine malfunction.
Precautions when having a mobile communication system in the vehicle
Structurally, the electronic 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 CB radio, etc. (even if the output power is only 10W), 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 box. Therefore, the antenna must be installed at the rear of the vehicle
2. Lay the antenna cable as far as possible from the wiring of the electronic control unit, at least 20 cm, and especially do not twist them together.
3. Check if the setting is correct (harmonization) antenna cable and antenna.
4. Do not install a powerful radio station on the car.
Electronic Control Precautions
1. Before disconnecting the electrical connectors of the electronic control unit, it is necessary to turn off the electrical power by either the ignition key or by removing the terminals from the battery.
Note: Be sure to read the diagnostic code before removing the terminals from the battery.
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 light careless touching of the output contacts can cause serious damage.
5. Do not leave the cover of the housing of the electronic control unit
6. When operating in rainy weather, keep the electronic controls away from water. The same should be done 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, cold start injectors and their connectors, use special tools (special diagnostic cables).
Fuel System Precautions
1. When the high pressure fuel line is disconnected, a large amount of fuel will spill out. Therefore, the following must be done.
A) Disconnect the fuel pump connector.
b) Start the engine. After the engine stops spontaneously, turn off the ignition.
V) Place a container under the connection.
G) Loosen the connection slowly.
d) Disconnect the connection.
e) Seal the connection with a rubber stopper.
and) Reconnect the fuel pump connector.
2. Disconnect the negative wire from the battery before starting work on the fuel system.
Note:
- The diagnostic code in the memory of the electronic control unit is usually erased when removed (-) negative terminal from the battery. Therefore, it is necessary to read the diagnostic codes before disconnecting the battery.
- Do not smoke or use open flames when working on the fuel system.
- Relieve the fuel pressure in the gas tank by opening the tank cap.
3. When tightening the nipple connection or bypass bolt connection on the high pressure fuel line, do the following: bypass bolt connection.
A) Always use a new gasket.
b) Tighten the bolt by hand.
V) Tighten to the required torque.
Tightening torque - 29 Nm
Nipple connection
A) Apply a thin coat of spindle oil to the nut and hand tighten the nut first. Then tighten the connection with a torque wrench.
Tightening torque - 30 Nm
4. Precautions when removing and installing injectors.
A) Avoid using an old 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.
5. Connect the Injector to the fuel manifold and cylinder head as shown.
6. After servicing the fuel system, check for fuel leakage.
A) Turn on the ignition (do not start the engine).
b) Use a service wire to short the leads "IN" And "P" diagnostic socket.
V) If the fuel return line to the tank is pinched, the pressure in the high pressure fuel line will rise to approximately 4 kg / cm2 (392 kPa). Check for fuel leakage along the entire line.
Note: The fuel line must be pinched. Never bend the fuel line to avoid its destruction.
G) Switch off the ignition and remove the service wire from the terminals of the diagnostic connector.
Note: After working on the fuel system for a week, check the engine for leaks and fuel smell.