Caution: Never drop the ECU, especially on a hard surface. Such a shock to the ECU can damage it.
ECU Removal
- Remove the seat covers (See Seat) Cover Removal in the Frame chapter).
- Open the clamps [A].
- Disconnect the connectors [B].
- Remove the bolts [C].
![](https://motoinstruction.ru/img/kawasaki/23/128328.jpg)
- For equipped with an ABS, remove the ABS fuse boxes [A]
![](https://motoinstruction.ru/img/kawasaki/23/128329.jpg)
- Remove the Push the center pin, and then remove the quick rivet [A].
Pull out the rear fender rear backward and downward.
![](https://motoinstruction.ru/img/kawasaki/23/128330.jpg)
- Remove the bolts [A].
![](https://motoinstruction.ru/img/kawasaki/23/128331.jpg)
Disconnect the ECU connectors [A] and remove the ECU [B].
![](https://motoinstruction.ru/img/kawasaki/23/128332.jpg)
ECU Installation
Install:
- ECU [A] (In rubber protector [B])
- ECU Connectors [C]
![](https://motoinstruction.ru/img/kawasaki/23/128333.jpg)
- Fit [A] the bracket on the ECU as shown.
- Install the removed parts (see appropriate chapters).
![](https://motoinstruction.ru/img/kawasaki/23/128334.jpg)
ECU Power Supply Inspection
- Visually inspect the terminals [A] of the ECU connectors.
If the connector is clogged with mud or dust, blow it off with compressed air.
Replace the main harness if the terminals of the main harness connectors are cracked, bent, or otherwise damaged.
Replace the ECU if the terminals of the ECU connectors are cracked, bent, or otherwise damaged.
![](https://motoinstruction.ru/img/kawasaki/23/128335.jpg)
- With the ECU connectors [A] connected, check the following ground lead for continuity with the ignition switch OFF, using a digital meter and needle adapter set.
- Battery [B]
- Digital Meter [C]
Special Tool - Needle Adapter Set: 57001-1457
ECU Grounding Inspection
- 34, 50, or 51 (BK/Y)
- Terminal <—> Battery (-)
- Terminal: 0 Q
- Engine Ground <—> Battery (-) Terminal: 0 Q
If no continuity, check the connector, the engine ground lead, or main harness, and repair or replace them if necessary.
![](https://motoinstruction.ru/img/kawasaki/23/128336.jpg)
- Check the ECU power source voltage with a digital meter [A].
Position the terminal in accordance with terminal numbers of ECU connector [B] in this chapter figure.
- Battery [C]
![](https://motoinstruction.ru/img/kawasaki/23/128337.jpg)
ECU Power Source Inspection
Meter Connections:
- Between Terminal 16 (BR/W) and Battery (-) Terminal
- Between Terminal 17 (W/BK) and Battery (-) Terminal
Ignition Switch OFF:
- Terminal 16 (BR/W): 0 V
- Terminal 17 (W/BK): Battery Voltage
Ignition Switch ON:
- Both: Battery Voltage
If the meter does not read as specified, 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, reply and wiring are good, replace the ECU (See ECU Removal/Installation).
ECU Power Source Circuit
![](https://motoinstruction.ru/img/kawasaki/23/128338.jpg)
1. ECU; 2. Water-proof Joint C; 3. Ignition Switch; 4. Water-proof Joint A; 5. ECU Main Fuse 15 A; 6. ECU Main Relay; 7. Relay Box; 8. Main Fuse 30 A; 9. Battery; 10. Frame Ground; 11. Joint Connector