Troubleshooting the DFI System
After measurement, remove the needle adapters and ap-
ply silicone sealant to the seals [A] of the connector [B]
Silicone Sealant (Kawasaki Bond: 56019-120)
Seals of Connector
Always check battery condition before replacing the DFI
parts. A fully charged battery is a must for conducting
accurate tests of the DFI system.
Trouble may involve one or in some cases all items.
Never replace a defective part without determining what
CAUSED the problem. If the problem was caused by
some other item or items, they too must be repaired or
replaced, or the new replacement part will soon fail again
Measure coil winding resistance when the DFI part is cold
(at room temperature)
Do not adjust or remove the throttle sensor.
Do not directly connect a 12 V battery to a fuel injector.
Insert a resistor (5 ∼ 7 Ω ) or a bulb (12 V × 3 ∼ 3.4 W) in
series between the battery and the injector.
The DFI parts have been adjusted and set with precision.
Therefore, they should be handled carefully, never strike
sharply, as with a hammer, or allowed to drop on a hard
surface. Such a shock to the parts can damage them.
Check wiring and connections from the ECU connector
to the suspected faulty DFI parts, using the hand tester
(special tool, analog tester) rather than a digital tester.
Special Tool - Hand Tester: 57001–1394
Make sure all connectors in the circuit are clean and tight,
and examine wires for signs of burning, fraying, etc. Dete-
riorated leads and bad connections can cause reappear-
ance of problems and unstable operation of the DFI sys-
If any wiring is deteriorated, replace the wiring.
FUEL SYSTEM (DFI) 3-23