Troubleshooting the DFI System
When an abnormality in the system occurs, the condition
of the problem is stored in the memory of the ECU (Elec-
tronic Control Unit). With the engine stopped and conduct a
self-diagnosis inspection, the service code [A] is indicated
by the number of times the FI indicator light blinks.
Ask the rider about the conditions [A] under which the
problem occurred and try to determine the cause [B].
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. Don't rely solely
on the DFI self-diagnosis function, use common sense.
When the ignition coil or crankshaft sensor are trouble,
the FI indicator light does not go on.
If the FI indicator light goes on by kicking the kick pedal
about ten times, these parts are broken.
Even when the DFI system is operating normally, the FI
indicator light may light up under strong electrical interfer-
ence. No repair needed.
When the FI indicator light goes on and the motorcycle 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 checking the DFI parts, use a digital meter which
can be read two decimal place voltage or resistance.
The DFI part connectors [A] have seals [B], including the
ECU. When measuring the input or output voltage with the
connector joined, use the needle adapter set [C]. Insert
the needle adapter inside the seal until the needle adapter
reaches the terminal.
Special Tool - Needle Adapter Set: 57001-1457
Insert the needle adapter straight along the terminal
in the connector to prevent short-circuit between
Make sure that measuring points are correct in the con-
nector, noting the position of the lock [D] and the lead
color before measurement. Do not reverse connections
of a digital meter.
Be careful not to short-circuit the leads of the DFI or elec-
trical system parts by contact between adapters.
Connect the power supply harness (option P/No. 26011
-0246) and the battery to the capacitor lead connector,
and measure the voltage with the connector joined.
Incorrect, reverse connection or short circuit by
needle adapters could damage the DFI or electrical
FUEL SYSTEM (DFI) 3-19