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body outlet respectively. It is forbidden to directly soak
the throttle valve body assembly and intake manifold
assembly with any liquid.
h. After cleaning the heat insulation pad, replace 2
new O-rings ⑽ and assemble them in place. Wipe
clean the contact surface of the intake manifold and the
heat insulation pad and the end surface of the heat
insulation pad and the engine. Reversely reset all
materials in the order of disassembly.
4. Disassemble the three-in-one sensor
a. If the idling speed is abnormal, it is easy to
extinguish and the spark plug and high voltage coil are
eliminated, the three-in-one sensor needs to be
removed for investigation. It should not be disassembled
under normal circumstances.
b. Refer to the steps for removing carbon deposits
without disassembling the throttle valve body, and
unplug the plugs of the stepping motor ① and the CTS
three-in-one sensor ②. Remove the stepper motor.
c. Use a short Phillips screwdriver to remove the 2
bolts ③ that comes with the throttle valve body
assembly, and then remove the three-in-one sensor
④.It is forbidden to soak the sensor with any liquid.
d. Wipe clean the sensor head or replace with a new
three-in-one sensor, align the three-in-one sensor with
the shaft ⑤ and install it back on the valve body.
Reinstall the stepper motor.
5. Throttle valve body troubleshooting process
Throttle valve body
troubleshooting process
Idle adjustment bolt
looseness,poition
spring stagnation and
other problems
According to idle
speed,determine idle speed
adjustment bolt position and
fix; replace recoil spring or
cleaning throttle valve body
disc
Throttle body sensor
performance check
Fault lights are always
on druing riding
Check the corresponding sensor
according to the fault code,if the
circit is normal,the sensor can be
judged to be faulty and need to be
replaced.
The diagnostic
instrument eads the data
stream and requires the
engineer to judge
whether the sensor is
working properly
●The vehicle must be parked on a flat and stable ground
or a lifting platform.
●Once the engine and muffler have cooled down, the
operation can be performed.
●When removing the high-pressure fuel pipe, prevent
the fuel from dripping onto the surface of the part.
●Smoking, making calls, etc. are prohibited in the
workplace.
●Remove the throttle valve body to clean the carbon
deposits and operate in a dust-free and dust-free
environment to prevent dust from entering the inside of
the engine.
●Prevent foreign matter from falling into the engine or air
filter.
●If the stepper motor, three-in-one sensor and heat
insulation pad are disassembled, do not miss the sealing
ring and make sure that the sealing ring is assembled in
place without cutting edges.
●Do not use carburetor cleaner or compressed air to
clean the throttle valve body.
●The EFI system needs to be reset after reinstalling the
battery.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.
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