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:

Valve Removal
Remove the cylinder head (see Cylinder Head Removal). Remove the valve lifter and shim. Mark and record the valve lifter and shim locations so they can be installed in their original positions. Using the valve spring compressor assembly, remove the valve. Special Tools - Valve ...

Front Fork Inspection
Holding the brake lever, pump the front fork up and down several times to inspect smooth stroke. Visually inspect the front fork for oil leakage, scoring or scratches on the outer surface of the inner tube. If any doubt about the front fork, it should be checked by an authorized K ...

Service Code Reading
The service code(s) is displayed on the LCD by the number of two digits. NOTE The service code of the KIBS and ABS adds “b” at the left side of the code. The service code of the ESD adds “E” at the left side of the code. When there are a number of problems, all the serv ...