Yamaha Tracer MT09TRA - Service manual > Electric starting system

Circuit diagram

3. Main switch

4. Main fuse

11.Ignition fuse

15.Battery

16.Engine ground

17.Fuel injection system fuse

18.Starter relay

19.Starter motor

20.Joint connector

21.Joint coupler

22.Relay unit

23.Starting circuit cut-off relay

25.Sidestand switch

66.Gear position switch

69.Handlebar switch (right)

71.Start/engine stop switch

76.Handlebar switch (left)

77.Clutch switch

Starting circuit cut-off system operation

If the main switch is turned to "ON" and the " " side of the start/engine stop switch is pushed, the starter motor can only operate if at least one of the following conditions is met:

• The transmission is in neutral (the neutral circuit of the gear position switch is closed).
• The clutch lever is pulled to the handlebar (the clutch switch is closed) and the sidestand is up (the sidestand switch is closed).

The starting circuit cut-off relay prevents the starter motor from operating when neither of these conditions has been met. In this instance, the starting circuit cut-off relay is open so current cannot reach the starter motor. When at least one of the above conditions has been met the starting circuit cut-off relay is closed and the engine can be started by pushing the " " side of the start/engine stop switch.

a. WHEN THE TRANSMISSION IS IN NEUTRAL

b. WHEN THE SIDESTAND IS UP AND THE CLUTCH LEVER IS PULLED TO THE HANDLEBAR

1. Battery

2. Main fuse

3. Main switch

4. Ignition fuse

5. Start/engine stop switch

6. Starting circuit cut-off relay

7. Diode

8. Clutch switch

9. Sidestand switch

10.Gear position switch (neutral circuit)

11.Diode

12.Starter relay

13.Starter motor

Troubleshooting

The starter motor fails to turn.

TIP

• Before troubleshooting, remove the following part(s):

1. Fuel tank front cover/Front side panel/Front side cowling

2. Passenger seat/Rider seat

3. Fuel tank cover

4. Fuel tank

5. Air filter case

6. Throttle bodies

See also: