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


Special Tool - Measuring Adapter: 57001-1700

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

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

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:

DFI System Wiring Diagram
Part Names 1. Air Intake Solenoid Valve (Other than US, CA and CAL Models) 2. Front Wheel Rotation Sensor 3. Engine Stop Switch 4. Starter Button 5. Air Switching Valve 6. Stick Coil #1, #2, #3, #4 7. Spark Plugs 8. Intake Air Temperature Sensor 9. Crankshaft Sensor 10. Secondary Fuel ...

Idle Speed Inspection
Start the engine and warm it up thoroughly. With the engine idling, turn the handlebar to both sides [A]. If handlebar movement changes the idle speed, the throttle cables may be improperly adjusted or incorrectly routed, or damaged. Be sure to correct any of these conditions before rid ...

Crankshaft Removal
Split the crankcase (see Crankcase Splitting). Remove: Connecting Rod Big End Nuts [A] Connecting Rod Big End Caps [B] NOTE Mark and record the locations of the connecting rods and their big end caps so that they can be reassembled in their original positions. Remove the crank ...