Kawasaki Ninja Service Manual: ECU Power Supply Inspection

Kawasaki Ninja Service Manual / Fuel System (DFI) / ECU / ECU Power Supply Inspection

Remove the upper air cleaner housing (see Air Cleaner Element Replacement in the Periodic Maintenance chapter).
Visually inspect the ECU connectors.

If the connector is clogged with mud or dust, blow it off with compressed air.

Remove the ECU (see ECU Removal).
Visually inspect the terminals [A] of the ECU connectors.

If the terminals of the main harness connectors are damaged, replace the main harness.

If the terminals of the ECU connectors are damaged, replace the ECU.

ECU Power Supply Inspection

Turn the ignition switch to OFF.
Disconnect the ECU connectors.

Gray Connector [A]
Set the hand tester [B] to the × 1 Ω range and check the following wiring for continuity.

ECU Power Supply Inspection

Special Tool - Hand Tester: 57001-1394

ECU Grounding Inspection

Connections:

(I) BK/Y leads (ECU terminal 40, 73 or 74) ←→ Battery (–) Terminal

(II) Engine Ground ←→ Battery (–) Terminal

Criteria: Both: 0 Ω

If no continuity, check the connectors, the engine ground lead, or main harness, and repair or replace them if necessary.

If the wiring is good, check the power source voltage of the ECU.

ECU Grounding Inspection

NOTE

Be sure the battery is fully charged.

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

Special Tool - Needle Adapter Set: 57001-1457

ECU Power Supply Inspection Connections:

(I) Digital Meter (+) → Terminal 41 (W/BK)

Digital Meter (–) → Battery (–) terminal

(II) Digital Meter (+) → Terminal 53 (BR/W)

Digital Meter (–) → Battery (–) terminal

(III) Digital Meter (+) → Terminal 54 (W/BK)

Digital Meter (–) → Battery (–) terminal

Ignition Switch OFF:

Terminal 41 (W/BK): Battery Voltage

Terminal 53 (BR/W): 0 V

Terminal 54 (W/BK): Battery Voltage

Ignition Switch ON:

All: Battery Voltage

If the reading is out of the specification, check the following.

Main Fuse 30 A (see Fuse Inspection in the Electrical System chapter)

ECU Fuse 15 A (see Fuse Inspection in the Electrical System chapter)

ECU Main Relay (see Relay Circuit Inspection in the Electrical System chapter)

Power Source Wiring (see wiring diagram in this section)

If the fuse, wiring and relay are good, replace the ECU (see ECU Removal/Installation).

ECU Removal

NOTICE Never drop the ECU especially on a hard surface. Such a shock to the ECU can damage it. Remove the upper air cleaner housing (see Air Cleaner Element Replacement in the Periodic Maint ...

ECU Power Source Circuit

1. Ignition Switch 2. Joint Connector E 3. ECU 4. Engine Ground 5. Battery 6. Starter Relay 7. Main Fuse 30 A 8. ECU Fuse 15 A 9. Frame Ground 2 10. Frame Ground 1 11. Fuse Box 1 12. Ig ...

Other materials:

Battery Removal
Remove the rider’s seat (see Seats section in the GENERAL INFORMATION chapter). Turn the ignition switch to “OFF” and disconnect the (–) cable from the battery. Remove the red cap form the (+) terminal, and disconnect the (+) cables from the battery. NOTE The battery is ...

Gear Position Switch Output Voltage Inspection
NOTE Be sure the battery is fully charged. Turn the ignition switch to OFF. Remove the fuel tank (see Fuel Tank Removal in the Fuel System (DFI) chapter). Disconnect the sidestand switch/gear position switch lead connector [A]. Connect the measuring adapter [A] between the ...

Fuel Level Warning Indicator Light
: The fuel level warning indicators are activated when approximately 3.8 L (1.0 US gal) of fuel remains as follows: For models without KIBS: A. Fuel Level Warning Indicator Light B. “FUEL” Indication The fuel level warning indicator light ( ) goes on and “FUEL” blinks in the ...