Versions with petrol engines
Attention.
- Leaks in fuel lines in a pressurized system are dangerous. Fuel can ignite and cause equipment damage, serious injury, or even death. Fuel can also come into contact with human skin and eyes. To prevent this, it is essential to perform a pressure relief procedure in the fuel system.
- A person carrying a static charge can cause a fire or explosion, which could result in death or serious injury. Before working on the fuel system, you must discharge static electricity by touching the vehicle body.
Checking the tightness of fuel lines
Using the M-MDS diagnostic tool
1. Connect the M-MDS device to the DLC-2 diagnostic connector.
2. Turn on the ignition (do not start the engine).
3. Using the "FP" simulation function, turn on the fuel pump.
4. Make sure there are no fuel leaks from the fuel system components under pressure.
Note: Normally there should be no fuel leaks for five minutes after starting (as a rule, if leaks have not occurred during this time, they will not occur).
5. If fuel leaks are detected, replace the relevant components and repeat the inspection procedure again.
Note.
- If there are leaks, replace the fuel hoses with clamps.
- If there is damage to the seals on the fuel line side, replace the fuel line with a new one.
Without using the M-MDS diagnostic tool
1. Disconnect the negative battery terminal.
2. Remove the fuel pump relay.
Relay and fuse box
Caution: It is necessary to short-circuit the required terminals, since short-circuiting the wrong terminals of the relay and fuse box may cause malfunctions.
3. Using a jumper, short-circuit terminals C and D of the fuel pump relay in the relay and fuse box.
4. Connect the negative battery terminal and start the fuel pump.
5. Make sure there are no fuel leaks from the fuel system components under pressure.
Note: Normally there should be no fuel leaks for five minutes after starting (as a rule, if leaks have not occurred during this time, they will not occur).
6. If fuel leaks are detected, replace the relevant components and repeat the inspection procedure again.
Note.
- If there are leaks, replace the fuel hoses with clamps.
- If there is damage to the seals on the fuel line side, replace the fuel line with a new one.
Versions with diesel engines
Attention.
- Leaks in fuel lines in a pressurized system are dangerous. Fuel can ignite and cause equipment damage, serious injury, or even death. Fuel can also come into contact with human skin and eyes. To prevent this, it is essential to perform a pressure relief procedure in the fuel system.
- A person carrying a static charge can cause a fire or explosion, which could result in death or serious injury. Before working on the fuel system, you must discharge static electricity by touching the vehicle body.
Removal air from fuel lines
1. Make sure all fuel hoses are securely connected.
Caution. Prolonged cranking of the engine crankshaft by the starter can lead to battery discharge and damage to the starter. To prevent this, ensure that the duration of crankshaft rotation by the starter does not exceed 10 seconds.
2. Turn the engine crankshaft until it starts.
- If the engine starts, the procedure is complete.
- If the engine does not start, proceed to the next step.
3. Wait 20 seconds.
Caution. Prolonged cranking of the engine crankshaft by the starter can lead to battery discharge and damage to the starter. To prevent this, ensure that the duration of crankshaft rotation by the starter does not exceed 10 seconds.
The article is reprinted from the portal mazbook.ru
4. Turn the engine crankshaft until it starts.
- If the engine starts, the procedure is complete.
- If the engine does not start, proceed to the next step.
5. Perform the following procedure:
Models for Europe
Disconnect the fuel return hose.
Connect the hand pump.
Pump the hand pump several times.
Disconnect the hand pump.
Connect the fuel return hose.
Except for European models
Remove the plug.
Install the vacuum pump as shown in the figure.
Pump out fuel until all air is removed.
Remove the vacuum pump and install the plug.
6. Turn the engine crankshaft until it starts.
- If the engine starts, the procedure is complete.
- If the engine does not start, repeat step 5.
Caution. Prolonged cranking of the engine crankshaft by the starter can lead to battery discharge and damage to the starter. To prevent this, ensure that the duration of crankshaft rotation by the starter does not exceed 10 seconds.