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

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.

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:

Radiator Cap Inspection
Remove: Radiator Cap (see Coolant Change in the Periodic Maintenance chapter) Check the condition of the bottom [A] and top [B] valve seals and valve spring [C]. If any one of them shows visible damage, replace the cap with a new one. Install the cap [A] on a cooling system pr ...

Cylinder Head Cover Removal
Remove: Air Suction Valves (see Air Suction Valve Removal) Throttle Body Assy (see Throttle Body Assy Removal in the Fuel System (DFI) chapter) Stick Coils (see Stick Coil Removal in the Electrical System chapter) Remove the clamps [A]. Turn up the front side of the heat insulation ...

Radiator and Radiator Fan Removal
Remove: Upper Fairing Assembly (see Upper Fairing Assembly Removal in the Frame chapter) Coolant (Drain, see Coolant Change in the Periodic Maintenance chapter) Air Cleaner Housing (see Air Cleaner Housing Removal in the Fuel System (DFI) chapter) Coolant Reserve Tank (see Coolant R ...