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:

Terminal Numbers of ECU Connectors
1. Subthrottle Valve Actuator: Y/BK 2. Subthrottle Valve Actuator: BK/O 3. Unused 4. Front Wheel Rotation Sensor Signal: G/Y 5. Unused 6. Starter Lockout Switch: R/G 7. Gear Position Switch: G/R 8. Crankshaft Sensor (–): BK 9. Power Supply to Sensors: BL 10. Unused 11. Intake Air Pre ...

Drive Chain Slack Inspection
Refer to the Drive Chain Slack Inspection in the Periodic Maintenance chapter. Drive Chain Slack Adjustment Refer to the Drive Chain Slack Adjustment in the Periodic Maintenance chapter. Wheel Alignment Inspection/Adjustment Refer to the Wheel Alignment Inspection in the Periodic Maintenance ...

Exploded View
14. Thermostat 15. Frame No. JKAZXT00JJA003074 or JKAZXCJ1 BA003074 G: Apply grease. HG: Apply high-temperature grease. L: Apply a non-permanent locking agent. R: Replacement Parts S: Follow the specified tightening sequence. W: Apply water. 1. US, CA and CAL Models 2. Fra ...