2012 Na Yamaha Super Tenere Manual

haha FEATURES
1-12
Wheel slip and hydraulic control
The ABS ECU calculates the wheel speed of each wheel according to the rotation signal received from 
the front and rear wheel sensors. In addition, the ABS ECU calculates th\
e vehicle chassis speed and 
the rate of speed reduction based on the wheel speed values.
The difference between the chassis speed and the wheel speed calculated in the slip ratio formula is 
equal to the wheel slip. When the wheel speed is suddenly reduced, the wheel has a...

haha FEATURES
1-13
ABS operation and vehicle control
If the ABS starts operating, there is a tendency of the wheel to lock, and the vehicle is approaching the 
limit of control. To make the rider aware of this condition, the ABS has been designed to generate a 
reaction-force pulsating action in the brake lever and brake pedal independently.
TIP
When the ABS is activated, a pulsating action may be felt at the brake l\
ever or brake pedal, but this 
does not indicate a malfunction.
The higher the side...

haha FEATURES
1-14
Electronic ABS features
The Yamaha ABS (anti-lock brake system) has been developed with the most advanced electronic 
technology.
The ABS also includes a highly developed self-diagnosis function. The ABS has been designed to op-
erate as a conventional brake system if the ABS malfunctions. Also, ther\
e may be little or no additional 
rear brake force provided by the UBS. If the UBS does not operate, the front and rear brakes will oper-
ate independently according to the rider input,...

haha FEATURES
1-15
ABS block diagram
EAS23P1062
ABS COMPONENT FUNCTIONS
Wheel sensors and wheel sensor rotors
Wheel sensors  “1” detect the wheel rotation speed and transmit the wheel rotation signal to the ABS 
ECU.
Each wheel sensor contains an MR sensor. The wheel sensors are installed in the sensor housing for 
each wheel.
Sensor rotors “2”  are installed on the inner side of the front and rear wheel hubs and rotate with the 
wheels.
The front and rear sensor rotors each have 92 magnetic poles (46...

haha FEATURES
1-16
ABS warning light
The ABS warning light  “1” comes on to warn the rider if a malfunction in the ABS occurs.
When the main switch is set to  “ON ”, the ABS warning light comes on for 2 seconds, then goes off, so 
that the rider can check if the ABS warning light is disconnected and check if the ABS is operating prop-
erly.
NOTICE
ECA23P1056
If the rear wheel is raced with the vehicle on the centerstand, the ABS \
warning light may flash 
or come on. If this occurs, set the main switch...

haha FEATURES
1-17
Hydraulic unit assembly
The hydraulic unit assembly  “1” is composed of hydraulic control valves (outlet solenoid valves, inlet 
solenoid valves, a shuttle solenoid valve, and a separation solenoid valve), buffer chambers, damping 
chambers, hydraulic pumps, an ABS motor, hydraulic pressure sensors (front brake master cylinder 
pressure sensor, rear brake master cylinder pressure sensor, and rear brake calip\
er pressure sensor), 
and an ABS ECU. The hydraulic unit adjusts the front...

haha FEATURES
1-18
The necessary actions are confirmed using the monitor circuit and control signals are transmitted to the 
hydraulic unit assembly.
ABS control operation
The ABS control operation performed in the ABS ECU is divided into the following two parts.
 Hydraulic control
 Self-diagnosis
When a malfunction is detected in the ABS, a fault code is stored in the memory of the ABS ECU for 
easy problem identification and troubleshooting.
TIP
 Some types of malfunctions are not recorded in the...

haha FEATURES
1-19
 The ABS performs a self-diagnosis test for a few seconds each time the vehicle first starts off after the 
main switch was set to “ ON”. During this test, a “ clicking” noise can be heard from under the seat, and 
if the brake lever or brake pedal is even slightly operated, a vibration can be felt at the lever and pedal, 
but these do not indicate a malfunction.
2 1
3
4
5
6
7
8
1. Software operation flow
2. Main switch  “ON ”
3. Initialize
4. Self-diagnosis (when static)
5....

haha FEATURES
1-20
EAS23P1063
UBS AND ABS OPERATION
The ABS hydraulic circuit consists of two systems: one for the front wheel and one for the rear wheel.
Normal braking (ABS not activated and UBS not activated)
Front brakes:
When the ABS is not activated, the inlet solenoid valve is open and the outlet solenoid valve is closed 
because a control signal has not been transmitted from the ABS ECU. Therefore, when the brake lever 
is squeezed, the hydraulic pressure in the front brake master cylinder...

haha FEATURES
1-21
Emergency braking (ABS activated and UBS not activated)
Depressurizing phase:
When the front wheel (or the rear wheel) is about to lock, the outlet solenoid valve is\
 opened by the 
“ depressurization ” signal transmitted from the ABS ECU. When this occurs, the inlet soleno\
id valve 
closes the brake line from the brake master cylinder. Because the outlet\
 solenoid valve is open, the 
brake fluid is sent to the buffer chamber. As a result, the hydraulic pressure\
 in the brake...