Service Manual (KLZ1000C) — page 111 of 762

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FUEL SYSTEM (DFI) 3-27
Troubleshooting the DFI System

• 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: 57001-1874

                            NOTICE
    Insert the needle adapter straight along the terminal
    in the connector to prevent short-circuit between
    terminals.

• 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.
•   Turn the ignition switch on and measure the voltage with
    the connector joined.
                            NOTICE
    Incorrect, reverse connection or short circuit by
    needle adapters could damage the DFI or electrical
    system parts.

○After measurement, remove the needle adapters and ap-
    ply silicone sealant to the seals [A] of the connector [B]
    for waterproofing.
    Sealant - Liquid Gasket, TB1211: 56019-120

• 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 the coil winding resistance when the DFI part is
    cold (at room temperature).
•   Make sure all connectors in the circuit are clean and tight,
    and examine leads for signs of burning, fraying, short,
    etc. Deteriorated leads and bad connections can cause
    reappearance of problems and unstable operation of the
    DFI system.
    If any wiring is deteriorated, replace the wiring.