Kawasaki Ninja Service Manual: ECU Power Supply Inspection

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

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

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

ECU Power Supply Inspection

Special Tool - Hand Tester: 57001-1394

ECU Grounding Inspection


(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


Be sure the battery is fully charged.

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:

For Secondary Fuel Injectors
Remove the fuel tank (see Fuel Tank Removal). Disconnect the secondary fuel injector connector [A]. Connect a digitalmeter to the terminals in each secondary fuel injector [A]. Measure the secondary fuel injector resistance. Secondary Fuel Injector Resistance Standard: Abo ...

KIBS Troubleshooting Outline
When an abnormality in the system occurs, the ABS indicator light (LED) and KIBS indicator light (LED) light up and the KIBS warning symbol are displayed on the LCD (Liquid Crystal Display) to alert the rider. In addition, the nature of the fault is stored in the memory of the KIBS hydraulic uni ...

Lighting System
This motorcycle adopt the daylight system and have a headlight relay in the relay box. The headlight does not go on when the ignition switch and the engine stop switch are first turned on. The headlight comes on after the starter button is released and stays on until the ignition switch is turn ...