Yamaha MTN850-A 2017 Service Manual page 14

TCS (Traction control system) block diagram
The signals from the front and rear wheel sensors are sent to the ECU through the ABS ECU, and the
ECU calculates the amount of slip according to the difference between the detected front and rear
wheel speeds.
If the amount of slip exceeds the preset value, the ECU controls the ignition timing, fuel cut-off, and
throttle valve opening of the YCC-T system so that the amount of slip is less than the preset value. The
traction control system indicator light in the meter assembly flashes when the traction control system
has activated.
1
2
1. Front wheel sensor
2. Rear wheel sensor
3. ABS ECU
4. Traction control system switch
5. ECU
A. Signal conversion
B. Slip amount calculation
C. Exceeds preset value
D. Actuator control
E. Fuel cut-off
F. Ignition timing (retarded)
G. Traction control system indicator light
(flashes)
H. YCC-T motor throttle valve opening
(decreased)
3
A
B
A
4
1-5
5
C
D
FEATURES
E
F
G
H