CF MOTO CF400-A 2017, Service Manual

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3-22
CFMOTO
Trouble and reason Solution(Chapter)
Battery or ECU ground wire loose
Inspect and repairing(See chapter 16)
Valve seat carbon covered Repairing (See chapter 5)
Engine overheat
(See chapter 17)
Others
：
Engine oil viscosity too high Replace(See chapter 2)
Transmission system problem
Inspect driving chain(See chapter 2) and
sprocket(See chapter 11)
Breaking jammed
Inspect the caliper sealant damaged or main
caliper release jammed(See chapter 12)
Clutch sliding Inspect pad wearing(See chapter 6)
Engine over heat
(See chapter 17)
EFI trouble
See EFI connector to make sure it is clean and
tight. And check the wire got wire or wearing(See
chapter 3)
Bad high speed running
：
Trouble and reason Solution(Chapter)
Wrong ignition timing
：
Spark plug dirty, damaged or wrong clearane Replace(See chapter 2)
Ignition coil problem
Inspect ignition coil(See chapter 16)
Ignition coil short cut or bad connection Reinstall or inspect the ignition coil(See chapter 16)
Wrong spark plug Use right spark plug(See chapter 16)
The ignition controlling mode in ECU provlem Inspect (See chapter 16)
CPS problem
Inspect (See chapter 16)
Wrong fuel mix ratio
：
Air filter jammed, bad sealing, or missing Clean the filter or check the sealing(See chapter3)
Air filter pipe loose Reinstall(See chapter 3)
Air filter O-ring damaged Replace(See chapter 3)
There is some water or other liquid in the fuel Replace the fuel(See chapter 3)
Throttle body loose Reinstall (See chapter 3)
Throttle body assy O-ring damaged Replace (See chapter 3)
Fuel pipe jammed Inspect and repair(See chapter 3)
Fuel pump fuse
（
15A
）
burnt often Replace the pump(See chapter 3)
Fuel pump problem Inspect(See chapter 3)
Intake temp. sensor problem Inspect (See chapter 3)
TPS problem Inspect (See chapter 3)
Injector jammed Inspect and replace(See chapter 3)
Cylinder pressure
The spark plug is loose Reinstall (See chapter 16)
EFI system trouble shooting diagram