TAYO Zontes ZT125-M 2022, Maintenance Manual

Page: 110 / 188

110 / 188
11. ECU
M310
When the engine cannot be started and the performance is poor, check whether the ECU is normal. Because the ECU is more
complicated and difficult to judge, the elimination method can generally be used to remove the ECU from a normal vehicle of
the same model and replace it with a faulty vehicle.
Refer to the steps of "Maintenance-Rear Shock Absorption-Replacement Rear Shock Absorber" and remove the right tail skirt
to expose the ECU.
The index finger and middle finger are respectively located under the lever. While pressing the buckle with the thumb, turn
the index finger and middle finger to the thumb direction to pull out the ECU plug. Use 5# inner hexagon to remove the bolt
⑴
to take off the ECU ⑵ .
M125
The ECU can only be removed after removing the rear storage box, rear armrest and rear right rear skirt. Pull out the ECU plug
after pressing the buckle indicated by the arrow. Remove 2 M6×12 bolts with 4# hexagon socket to remove the ECU.
12. Crankshaft position sensor
When the engine starts without dust or is difficult to start; poor acceleration and unstable idling; when the engine is stalled
intermittently, it is necessary to check whether the crankshaft position sensor is normal.
The crankshaft position sensor is installed on the right crankcase cover and integrated with the magneto stator. Locate the
sensor plug on the right side of the vehicle, press the head anti-trip lock and pull it out. Use a multimeter to measure the
resistance of the crankshaft position sensor ① at 25°C (77F), it should be 150±20Ω, otherwise it should be replaced.
In addition, the three-hole plug of the stator ② of the magneto uses a multimeter to measure the phase-to-phase resistance
of any two terminals at 25°C (77F), which should be 0.7±0.15Ω.