Service manual

3-26 FUEL SYSTEM (DFI)
Troubleshooting the DFI System
Sample Diagnosis Sheet
Rider name: Registration No. (license plate No.):
Year of initial registration: Model:
Engine No.: Frame No.:
Date problem occurred: Mileage:
Environment when problem occurred.
Weather
□fine, □cloudy,□rain, □snow, □always, □other:
Temperature □hot, □warm, □cold, □very cold, □always
Problem
frequency
□chronic, □often, □once
Road
□street, □mountain road (□uphill, □downhill), □bumpy, □pebble
Altitude □normal, □high (about 1 000 m o r more)
Vehicle conditions when problem occurred.
□light up immediately after ignition switch ON, and goes off after 1 ∼ 2 seconds
(normal)
□lights blinks immediately after ignition switch ON, and stays on (DFI problem)
□lights up immediately after ignition switch ON, but goes off after about 10 seconds
(DFI problem)
□unlights (light, ECU or its wiring fault)
FI indicator
light (LCD)
□sometimes lights up (probably wiring fault)
□starter motor not rotating
□starter motor rotating but engine doesn’t turn over
□starter motor and engine don’t turn over
□no fuel flow (□no fuel in tank, □no fuel pump sound)
□engine flooded (do not crank engine with throttle opened, which promotes engine
flooding)
□no spark
Starting
difficulty
□other
□right after starting
□when opening throttle lever
□when closing throttle lever
□when moving off
□when stopping the vehicle
□when cruising
Engine stops
□other
□very low idle speed, □very high idle speed, □rough idle speed
□battery voltage is low (charge the battery)
□spark plug loose (tighten it)
□spark plug dirty, broken, or gap maladjusted (remedy it)
□backfiring
□afterfiring
□hesitation when acceleration
□engine oil viscosity too high
□brake dragging
□engine overheating
Poor running
at low speed
□clutch slipping