Kawasaki Ninja Service Manual: Fuel Injector Output Voltage Inspection

Kawasaki Ninja Service Manual / Fuel System (DFI) / Fuel Injectors / Fuel Injector Output Voltage Inspection

NOTE

Be sure the battery is fully charged.

Fuel Injector Output Voltage Inspection

Turn the ignition switch to OFF.
Remove the ECU (see ECU Removal).

Do not disconnect the ECU connector

Connect a digital meter [A] to the connector (gray) [B] with the needle adapter set.

Special Tool - Needle Adapter Set: 57001-1457

Primary Fuel Injector Output Voltage [C] Connections to ECU Connector:

For Primary Fuel Injector #1

Fuel Injector Output Voltage Inspection

Digital Meter (+) → BL/R lead (ECU terminal 47)

Digital Meter (–) → Battery (–) terminal

For Primary Fuel Injector #2

Digital Meter (+) → BL/O lead (ECU terminal 48)

Digital Meter (–) → Battery (–) terminal

For Primary Fuel Injector #3

Digital Meter (+) → BL/BK lead (ECU terminal 49)

Digital Meter (–) → Battery (–) terminal

For Primary Fuel Injector #4

Digital Meter (+) → BL/Y lead (ECU terminal 50)

Digital Meter (–) → Battery (–) terminal

Secondary Fuel Injector Output Voltage [D]

Connections to ECU Connector: For Secondary Fuel Injector #1

Digital Meter (+) → O/R lead (ECU terminal 57)

Digital Meter (–) → Battery (–) terminal

For Secondary Fuel Injector #2

Digital Meter (+) → O/G lead (ECU terminal 72)

Digital Meter (–) → Battery (–) terminal

For Secondary Fuel Injector #3

Digital Meter (+) → O/BK lead (ECU terminal 61)

Digital Meter (–) → Battery (–) terminal

For Secondary Fuel Injector #4

Digital Meter (+) → O/Y lead (ECU terminal 62)

Digital Meter (–) → Battery (–) terminal

Measure the output voltage with the engine stopped and with the connector joined.
Turn the engine stop switch to run position.
Turn the ignition switch to ON.

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

Turn the ignition switch to OFF.

If the reading is in specification, 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 out of the specification, remove the ECU and check the wiring for continuity between main harness connectors.

Special Tool - Hand Tester: 57001-1394

Disconnect the ECU and injector connector.

Fuel Injector Output Voltage Inspection

Wiring Continuity Inspection (Primary Fuel Injectors) ECU Connector (Gray) [A] ←→ Primary Fuel Injector Connector [B]

For Primary Fuel Injector #1 [C]

BL/R lead (ECU terminal 47) [D]

For Primary Fuel Injector #2

BL/O lead (ECU terminal 48)

For Primary Fuel Injector #3

BL/BK lead (ECU terminal 49)

For Primary Fuel Injector #4

BL/Y lead (ECU terminal 50)

Wiring Continuity Inspection (Secondary Fuel Injectors) ECU Connector (Gray) [A] ←→ Secondary Fuel Injector Connector [E]

Fuel Injector Output Voltage Inspection

For Secondary Fuel Injector #1 [F]

O/R lead (ECU terminal 57) [G]

For Secondary Fuel Injector #2

O/G lead (ECU terminal 72)

For Secondary Fuel Injector #3

O/BK lead (ECU terminal 61)

For Secondary Fuel Injector #4

O/Y lead (ECU terminal 62)

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).

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 ...

Fuel Injector Fuel Line Inspection

Remove: Fuel Tank (see Fuel Tank Removal) Air Cleaner Housing (see Air Cleaner Housing Removal) Disconnect: Primary and Secondary Fuel Hoses (see Fuel Hose Replacement in the Periodic Mai ...

Other materials:

Separator Operation Test
WARNINGGasoline is extremely flammable and can be explosive under certain conditions. Turn the ignition switch OFF. Do not smoke. Make sure the area is well-ventilated and free from any source of flame or sparks; this includes any appliance with a pilot light. ...

Air Intake Solenoid Valve Unit Test
Remove the air intake solenoid valve (see Air Intake Solenoid Valve Removal in the Fuel System (DFI) chapter). Set the hand tester [A] to the × 1 Ω range and connect it to the air intake solenoid valve terminals as shown in the figure. Special Tool - Hand Tester: 57001-1394 ...

Crankcase Splitting
Remove the engine (see Engine Removal in the Engine Removal/Installation chapter). Set the engine on a clean surface and hold the engine steady while parts are being removed. Remove: Cylinder Head (see Cylinder Head Removal in the Engine Top End chapter) Starter Motor (see Starter M ...