Troubleshooting the DFI System
When the service code [A] is displayed, for first ask the
rider about the conditions [B] of trouble, and then start to
determine the cause [C] of problem.
As a pre-diagnosis inspection, check the ECU for ground
and power supply, the fuel line for no fuel leaks, and for cor-
rect pressure. The pre-diagnosis items cannot be detected
by the DFI self-diagnosis function.
Don't rely solely on the DFI self-diagnosis function, use
Even when the DFI system is operating normally, the
warning indicator light (LED) goes on and the "Error"
segments, service code and FI warning symbol may be
displayed under strong electrical interface. In this case,
additional measures are not required. Turn the ignition
switch OFF to go off the indicator light, segments, code
If the "Error" segments, service code and FI warning sym-
bol of the motorcycle brought in for repair still are displayed,
check the content of the service code.
When repair has been done, the "Error" segments, ser-
vice code and FI warning symbol go off (return to the nor-
mal display). But the service codes stored in memory of the
ECU are not erased to preserve the problem history. The
problem history can be referred using the KDS (Kawasaki
Diagnostic System) when solving unstable problems.
When the motorcycle is down, the vehicle-down sensor
operates and the ECU shuts off the fuel pump relay, fuel in-
jectors and ignition system. The ignition switch is left ON. If
the starter button is pushed, the electric starter turns but the
engine does not start. When the starter button is pushed,
the warning indicator light (LED) blinks and the FI warning
symbol is displayed on the LCD but the "Error" segments
and the service code are not displayed. To start the engine
again, raise the motorcycle, turn the ignition switch OFF,
and then ON.
Much of the DFI system troubleshooting work consists
of confirming continuity of the wiring. The DFI parts are
assembled and adjusted with precision, and it is impossible
to disassemble or repair them.
FUEL SYSTEM (DFI) 3-23