ELECTRIC STARTING SYSTEM

CIRCUIT DIAGRAM

4.

Joint connector

5.

Main relay

6.

Engine ground

7.

Battery

8.

Frame ground

9.

Fuse

10.

Starter relay

11.

Starter motor

12.

Diode 1

13.

Diode 2

16.

ECU (Engine Control Unit)

25.

Engine stop switch

26.

Gear position switch

28.

Start switch

29.

Diode 3

A.

Battery sub-lead

B.

Wire harness

TROUBLESHOOTING

The starter motor fails to turn.

Before troubleshooting, remove the following part(s):

  • Seat

  • Side cover (left/right)

  • Air scoop (left/right)

  • Fuel tank

  • Air filter case cover

  1. Check the fuse.

    Refer to CHECKING THE FUSES.

 NG→

Replace the fuse(s).
OK↓

  1. Check the battery.

    Refer to CHECKING AND CHARGING THE BATTERY.

 NG→

  • Clean the battery terminals.

  • Recharge or replace the battery.
OK↓

  1. Check the main relay.

    Refer to CHECKING THE RELAYS.

 NG→

Replace the main relay.
OK↓

  1. Check the starter motor operation.

    Refer to CHECKING THE STARTER MOTOR OPERATION.

 OK→

Starter motor is OK. Perform the electric starting system troubleshooting, starting with step (5).
NG↓

  1. Check the starter motor.

    Refer to CHECKING THE STARTER MOTOR.

 NG→

Repair or replace the starter motor.
OK↓

  1. Check the diodes.

    (Diode 1, diode 2, diode 3)

    Refer to CHECKING THE RELAY UNIT (DIODE).

 NG→

Replace the diodes.
OK↓

  1. Check the starter relay.

    Refer to CHECKING THE RELAYS.

 NG→

Replace the starter relay.
OK↓

  1. Check the engine stop switch.

    Refer to CHECKING THE SWITCHES.

 NG→

Replace the engine stop switch.
OK↓

  1. Check the start switch.

    Refer to CHECKING THE SWITCHES.

 NG→

Replace the start switch.
OK↓

  1. Check the entire starting system’s wiring.

    Refer to CIRCUIT DIAGRAM.

 NG→

Properly connect or repair the starting system’s wiring.
OK↓

Replace the ECU.