Zontes ZT350T-D, Руководство по обслуживанию

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3. EFI system
Know Before Service
Caution:
1. The structure and working principle of the EFI system are relatively complicated, and it is necessary to have a certain
understanding of the working principle and structural characteristics of each EFI system before checking and troubleshooting.
The content of this chapter requires certain maintenance experience. It is recommended to check or repair with a qualified
maintenance organization.
2. Please keep the fuel in the fuel tank at least 3L (3.17 US qt, 2.64 lmp qt, 0.79 US gal, 0.66 lmp gal), otherwise it will affect the
normal operation of the EFI system. Instrument oil level display 1 grid or less need to be replenished fuel as soon as possible.
3. When the vehicle is parked for more than 3 hours, the vehicle should be energized before the first start. Turn on the flameout
switch "" and wait for the fuel pump to complete the fuel pressure before starting the vehicle.
4. If you fail to start several times, the cylinder may have been flooded. You need to turn the throttle to the end and press the
start button for 3 seconds to execute the cylinder cleaning procedure.
5. If the battery low voltage warning symbol flashes, charge the battery in time; too low voltage may cause the EFI components
to fail to work normally, fail to start or start difficult, insufficient power, etc.
6. The EFI system needs to be reset when the battery is reinstalled, the power is suddenly cut off during driving, the idling speed
is abnormal, and the insurance is re-plugged. The specific method is as follows:
a. Unlock the vehicle and support the main bracket;
b. Pinch the brake and start the vehicle;
c. Pull the engine speed above 3000 rpm;
d. After releasing the throttle, turn off the flameout switch and lock the car;
e. After waiting for 5 seconds, unlock the vehicle again to complete the reset of the EFI system.
7. Pay attention to the following when checking or troubleshooting EFI system failures:
a. After power-on, the parts connected to the 12V power supply should not be removed at will to avoid the self-inductance of
the coil in the electrical appliance and cause the instantaneous voltage to damage the ECU or sensor.
b. Do not blindly disassemble and inspect when failure occurs. Check the electrical control part after confirming that the
mechanical part is normal.
c. During the fault diagnosis, give priority to using the diagnostic Speedometer to read the fault code or determine the fault
code according to the flashing frequency of the fault indicator, and conduct targeted inspections.
d. Pay attention to check whether the EFI components are oxidized and whether the connection is reliable
Tools
：
PT300EFI flashing diagnostic
Speedometer
（
16PIN
）
Multimeter
8. The driving conditions and maintenance conditions of each vehicle are different, so it is impossible to list all the fault
phenomena and troubleshooting procedures one by one. Only some of the more common faults can be listed. Maintenance
personnel themselves also need to have certain professional knowledge and experience accumulation process.
●Do not turn on the flameout switch for a new car or a vehicle that is about to run out of fuel. Be sure to replenish enough fuel
before turning it on, otherwise the fuel pump will be damaged if it runs dry without fuel.
●Do not insert or unplug the plugs of various parts at will, and it is forbidden to clean the plugs directly with water. After
plugging and unplugging, be sure to check whether it is plugged back correctly.