Service manual

FUEL SYSTEM (DFI) 3-21
Troubleshooting the DFI System
Outline
When an abnormality in the DFI system occurs, the FI
indicator light (LCD) goes on to alert the rider on the meter
panel. In addition, the condition of the problem is stored in
the memory of the ECU (electronic control unit). With the
engine stopped and turned in the self-diagnosis mode, the
service code [A] is indicated by the number of times the FI
indicator light (LCD) blinks.
When due to a malfunction, the FI indicator light (LCD) re-
mains lit, ask the rider about the conditions [B] under which
the problem occurred and try to determine the cause [C].
First, conduct a self-diagnosis inspection and then a
non-self-diagnosis inspection. The non-self-diagnosis
items are not indicated by the FI indicator light (LCD). Don’t
rely solely on the DFI self-diagnosis function, use common
sense.
Even when the DFI system is operating normally, the FI
indicator light (LCD) [A] may light up under s trong electrical
interference. No repair needed. Turn the ignition switch
OFF to stop the indicator light.
When the FI indicator light (LCD) goes on and the vehicle
is brought in for repair, check the service codes.
When the repair has been done, the light doesn’t go on.
But the service codes stored in memory are not erased to
preserve the problem history, and the light can display the
codes in the self-diagnosis mode. The problem history is
referred when solving unstable problems.
When the vehicle is down, the vehicle-down sensor is
turned OFF and the ECU shuts off the fuel injector and igni-
tion system. The FI indicator light (LCD) blinks but the ser-
vice code cannot be displayed. The ignition switch is left
ON. If the starter button is pushed, the electric starter turns
but the engine doesn’t start. To s tart the engine again, raise
the vehicle, turn the ignition switch OFF, and then ON. The
vehicle-down sensor is turned ON and the light goes OFF.