Service Manual (KLZ1000C) — page 666 of 762

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17-64 SELF-DIAGNOSIS SYSTEM
Fuel Injectors #1, #2, #3, #4 (Service Code 41, 42, 43, 44) (DTC P0201, P0202,
P0203, P0204)
Fuel Injector Power Source Voltage Inspection
                               NOTE
    ○Be sure the battery is fully charged.
• Turn the ignition switch off.
• Air Cleaner Housing (see Air Cleaner Housing Re-
  Remove:

     moval(3-54))
•   Disconnect the fuel injector connector and connect the
    measuring adapter [A] between these connectors as
    shown.
     Main Harness [B]
     Fuel Injector #1 [C]
    Special Tool - Measuring Adapter: 57001-1700
• Connect
  leads.
          a digital meter [D] to the measuring adapter

    Fuel Injector Power Source Voltage
      Connections to Adapter:
        For Fuel Injector #1, #2, #3, #4
          Digital Meter (+) → R (injector W/R) lead
          Digital Meter (–) → Battery (–) Terminal

• Measure     the power source voltage with the engine
  stopped and with the connector jointed.
• Slide  the engine start/stop switch to run position.
• Turn  the ignition switch on.
    Power Source Voltage
      Standard: Battery Voltage for 3 seconds, and then 0 V

• Turn  the ignition switch off.
  If the reading stays on battery voltage and never shows
    0 V, check the fuel pump relay (see Relay Circuit Inspec-
    tion(16-117)).
    If the fuel pump relay is normal, check the ECU for its
    ground and power supply (see ECU Power Supply In-
    spection(3-39)).
    If the ground and power supply are good, replace the
    ECU.
    If there is still no battery voltage, check the fuel pump relay
    (see Relay Circuit Inspection(16-117)).
    If the fuel pump relay is normal, check the power source
    wiring (see Fuel Injector Circuit(17-68)).
    If the wiring is good, check the ECU for its ground and
    power supply (see ECU Power Supply Inspection(3-39)).
    If the ground and power supply are good, replace the
    ECU.
    If the reading is in specification, check the output voltage
    (see Fuel Injector Output Voltage Inspection(17-65)).