Kawasaki Ninja Service Manual: For Primary Fuel Injectors

Kawasaki Ninja Service Manual / Fuel System (DFI) / Fuel Injectors / Fuel Injector Power Source Voltage Inspection / For Primary Fuel Injectors

For Primary Fuel Injectors

Remove the air cleaner housing (see Air Cleaner Housing Removal).
Disconnect the injector connector and connect the harness adapter [A] between these connectors as shown in the figure.

Main Harness [B] Primary Fuel Injector #1 [C]

Special Tool - Measuring Adapter: 57001-1700

Connect a digital meter [D] to the harness adapter lead.

Fuel Injector Power Source Voltage Inspection

Primary Fuel Injector Power Source Voltage Connections to Adapter:

For Primary 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.
Turn the engine stop switch to run position.
Turn the ignition switch to ON.

Power Source Voltage Standard: Battery Voltage for 3 seconds, and then 0 V

Turn the ignition switch to OFF

If the reading stays on battery voltage and never shows 0 V, check the fuel pump relay (see Relay Circuit Inspection in the Electrical System chapter).

If the fuel pump relay is normal, check the ECU for its ground and power supply (see ECU Power Supply Inspection).

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

If there is still no battery voltage, check the fuel pump relay (see Relay Circuit Inspection in the Electrical System chapter).

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

If there is still no battery voltage, check the fuel pump relay (see Relay Circuit Inspection in the Electrical System chapter).

If the fuel pump relay is normal, check the power source wiring (see wiring diagram in this section).

Special Tool - Hand Tester: 57001-1394

If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection).

If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).

If the reading is in specification, check the output voltage (see Fuel Injector Output Voltage Inspection).

Fuel Injector Power Source Voltage Inspection

NOTE Be sure the battery is fully charged. Turn the ignition switch to OFF. ...

For Secondary Fuel Injectors

Remove the fuel tank (see Fuel Tank Removal). Disconnect the injector connector and connect the harness adapter [A] between these connectors as shown in the figure. Main Harness [B] Secon ...

Other materials:

Radiator and Radiator Fan Installation
If the radiator bracket [A] was removed, install it. Install the radiator fan to the radiator Tighten the radiator fan mounting bolts. When installing the pad [B], install it so that the upper end of the pad aligns with the corner top [C]. When install the pad [D], install it so that the ...

Throttle Control System
Check the throttle grip play each day before riding the motorcycle, and carry out maintenance and adjustments in accordance with the Periodic Maintenance Chart. Adjust it if necessary. Throttle Grip The throttle grip controls the butterfly valves in the throttle body. If the throttle grip ha ...

Stick Coil Removal
Remove the air cleaner housing (see Air Cleaner Housing Removal in the Fuel System (DFI) chapter). Disconnect the stick coil connectors [A]. Pull out the stick coils [B] upward. First, turn the stick coil by 90 degrees, and then pull it out by twisting the coil head to the left and righ ...