Service Manual (KLZ1000C) — page 110 of 762

Text on this page

3-26 FUEL SYSTEM (DFI)
Troubleshooting the DFI System
Outline
  When a problem occurs with DFI system, the yellow en-
gine warning indicator light (LED) [A] stays on after starting
the engine to alert the rider.
  For models equipped with an immobilizer system, the red
immobilizer warning indicator light (LED) [B] blinks, when a
problem occurs in the system.

  With the engine stopped and turned in the self-diagnosis
mode, the service code [A] is displayed on the LCD by the
number of two digits.
  If the problem is with the following parts, the ECU can
not recognize these problem. Therefore, the yellow engine
warning indicator light (LED) does not go on, and service
code is not displayed.
    Fuel Pump
    ECU Main Relay

  When the service code is displayed, for first ask the rider
about the conditions [A] of trouble, and then start to deter-
mine the cause [B] of problem.
  As a pre-diagnosis inspection, check the ECU for ground
and power supply, the fuel line for no fuel leaks, and for
correct pressure. The pre-diagnosis items are not indicated
by the yellow engine warning indicator light (LED).
  Don’t rely solely on the DFI self-diagnosis function, use
common sense.

   Even when the DFI system is operating normally, the yel-
low engine warning indicator light (LED) goes on may be
displayed under strong electrical interference. Additional
measures are not required. Turn the ignition switch off to
stop the indicator light.
   If the yellow engine warning indicator light (LED) of the
motorcycle brought in for repair still goes on, check the ser-
vice code.
   When the repair has been done, the yellow engine warn-
ing indicator light (LED) goes off after the service code eras-
ing procedure (see Service Code Erasing(17-10)) is done.
   When the motorcycle is down, the vehicle-down sensor
operates and the ECU shuts off the fuel pump relay. The
ignition switch is left on. If the engine start/stop switch is
slid, the electric starter turns but the engine does not start.
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.