Efi System; Pre-Service Notice - TAYO Zontes ZT703-RR 2025 Maintenance Manual

Pre-Service Notice

1. The structure and working principle of the EFI system are complex, 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, and it is recommended to go to a maintenance unit with maintenance
qualifications for inspection or maintenance.
2. Please keep the fuel in the fuel tank not less than 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, and replenish the fuel as soon as possible when the meter oil level shows 1 bar.
3. Before the initial start of the motorcycle with a static parking time of more than 3 hours, the whole motorcycle should be
energized, and the stop-off switch should be turned on.
4. If the start fails many times, the cylinder may have been flooded, and you need to tighten the throttle to the end and
press the start button for 3 seconds to perform the cylinder cleaning procedure.
5. If the battery low voltage prompt symbol flashes, the battery should be charged in time; Too low a voltage may cause the
EFI parts to not work properly, fail to start or have difficulty starting, lack of power, etc.
6. When the battery is reinstalled, the power is suddenly cut off during driving, the idle speed is abnormal, and the insurance
is replugged and unplugged. Here's how：
Turn on the electric door lock switch and engine shutdown switch of the whole vehicle, turn off the engine shutdown switch
for 60 seconds, and then power it back on.
7. Pay attention when checking or troubleshooting the EFI system：
a. After powering on, the parts connected to the 12V power supply should not be dismantled at will, so as to avoid the coil in
the appliance from self-induction and instantaneous voltage damage to the ECU or sensor.
b. In the event of a failure, it should not be blindly dismantled and inspected. The mechanical part should be confirmed to be
normal before checking the electronic control part.
c.In fault diagnosis, the diagnostic instrument is preferentially used 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 parts are oxidized and whether the connection is reliable.
Tool：
MST-500Pro Diagnostic Instrument
●Both of the above diagnostic instruments can read fault codes; The PT300 diagnostic device can be flashed into the
program.
8. Each motorcycle has different driving conditions and maintenance conditions, so it is not possible to list all the fault
phenomena and troubleshooting procedures. Only some of the more common faults can be listed. Maintenance personnel
themselves also need to have a certain amount of professional knowledge and experience accumulation process.
9. If there is a "
●For new vehicles or vehicles that are about to run out of fuel, never turn on the kill switch. Be sure to fill up with enough fuel
before turning it on, otherwise the fuel pump will dry without oil and cause damage.
●Do not plug and unplug the plugs of each part at will, and do not directly clean the plug with water. Always check that it is
properly plugged back in after plugging and unplugging.
PT300 Electrojet Brush Writing
Diagnostic Instrument (16PIN)
"symbol on the right side of the step, you can click to quickly jump to the corresponding step.

3. EFI system

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