YAMAHA VMX17(Y) 2009 SERVICE MANUALS 2S3 E0
2009
SERVICE MANUAL
VMX17(Y)
2S3-28197-E0
EAS20040
VMX17(Y) 2009
SERVICE MANUAL
©2008 by Yamaha Motor Co., Ltd.
First edition, October 2008
All rights reserved.
Any reproduction or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
EAS20071
T
IMPORTANT
This manual was produced by the Yamaha Motor Company, Ltd. primarily for use by Yamaha dealers
and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one manual. Therefore, anyone who uses this book to perform maintenance and repairs on Yamaha vehicles
should have a basic understanding of mechanics and the techniques to repair these types of vehicles.
Repair and maintenance work attempted by anyone without this knowledge is likely to render the vehicle unsafe and unfit for use.
Yamaha Motor Company, Ltd. is continually striving to improve all of its models. Modifications and significant changes in specifications or procedures will be forwarded to all authorized Yamaha dealers and
will appear in future editions of this manual where applicable.
IP
Designs and specifications are subject to change without notice.
EAS20081
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to
avoid possible injury or death.
WARNING
NOTICE
TIP
A WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
A NOTICE indicates special precautions that must be taken to avoid
damage to the vehicle or other property.
A TIP provides key information to make procedures easier or clearer.
EAS20090
HOW TO USE THIS MANUAL
This manual is intended as a handy, easy-to-read reference book for the mechanic. Comprehensive
explanations of all installation, removal, disassembly, assembly, repair and check procedures are laid
out with the individual steps in sequential order.
• The manual is divided into chapters and each chapter is divided into sections. The current section title
“1” is shown at the top of each page.
• Sub-section titles “2” appear in smaller print than the section title.
• To help identify parts and clarify procedure steps, there are exploded diagrams “3” at the start of each
removal and disassembly section.
• Numbers “4” are given in the order of the jobs in the exploded diagram. A number indicates a disassembly step.
• Symbols “5” indicate parts to be lubricated or replaced.
Refer to “SYMBOLS”.
• A job instruction chart “6” accompanies the exploded diagram, providing the order of jobs, names of
parts, notes in jobs, etc.
• Jobs “7” requiring more information (such as special tools and technical data) are described sequentially.
EAS20100
T
SYMBOLS
The following symbols are used in this manual for easier understanding.
IP
The following symbols are not relevant to every vehicle.
SYMBOL DEFINITION SYMBOL DEFINITION
Serviceable with engine mounted Gear oil
G
Filling fluid Molybdenum disulfide oil
M
Lubricant Brake fluid
BF
Special tool Wheel bearing grease
Tightening torque Lithium-soap-based grease
T
.
R
.
Wear limit, clearance Molybdenum disulfide grease
Engine speed Silicone grease
B
LS
M
S
Electrical data Apply locking agent (LOCTITE®).
LT
Engine oil Replace the part with a new one.
E
New
EAS20110
TABLE OF CONTENTS
GENERAL INFORMATION
SPECIFICATIONS
PERIODIC CHECKS AND
ADJUSTMENTS
CHASSIS
ENGINE
1
2
3
4
5
COOLING SYSTEM
FUEL SYSTEM
ELECTRICAL SYSTEM
TROUBLESHOOTING
6
7
8
9
GENERAL INFORMATION
IDENTIFICATION ............................................................................................1-1
VEHICLE IDENTIFICATION NUMBER .....................................................1-1
MODEL LABEL..........................................................................................1-1
FEATURES......................................................................................................1-2
OUTLINE OF THE FI SYSTEM................................................................. 1-2
FI SYSTEM................................................................................................ 1-3
OUTLINE OF THE ABS.............................................................................1-4
ABS COMPONENT FUNCTIONS .............................................................1-9
ABS OPERATION ...................................................................................1-14
ABS SELF-DIAGNOSIS FUNCTION.......................................................1-17
ABS WARNING LIGHT AND OPERATION.............................................1-20
YCC-T (YAMAHA CHIP CONTROLLED THROTTLE)/YCC-I
(YAMAHA CHIP CONTROLLED INTAKE)............................................. 1-22
INSTRUMENT FUNCTIONS ...................................................................1-26
IMPORTANT INFORMATION .......................................................................1-34
PREPARATION FOR REMOVAL AND DISASSEMBLY......................... 1-34
REPLACEMENT PARTS.........................................................................1-34
GASKETS, OIL SEALS AND O-RINGS .................................................. 1-34
LOCK WASHERS/PLATES AND COTTER PINS ...................................1-34
BEARINGS AND OIL SEALS ..................................................................1-35
CIRCLIPS ................................................................................................ 1-35
1
CHECKING THE CONNECTIONS ................................................................1-36
SPECIAL TOOLS ..........................................................................................1-37
EAS20130
IDENTIFICATION
EAS20140
VEHICLE IDENTIFICATION NUMBER
The vehicle identification number “1” is stamped
into the right side of the steering head pipe.
1
EAS20150
MODEL LABEL
The model label “1” is affixed to the frame under
the rider seat. This information will be needed to
order spare parts.
IDENTIFICATION
1
1-1
FEATURES
EAS20170
FEATURES
EAS30340
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum
air-fuel ratio in accordance with the engine operating conditions and the atmospheric temperature. In
the conventional carburetor system, the air-fuel ratio of the mixture that is supplied to the combustion
chamber is created by the volume of the intake air and the fuel that is metered by the jet used in the
respective carburetor.
Despite the same volume of intake air, the fuel volume requirement varies by the engine operating conditions, such as acceleration, deceleration, or operating under a heavy load. Carburetors that meter the
fuel through the use of jets have been provided with various auxiliary devices, so that an optimum airfuel ratio can be achieved to accommodate the constant changes in the operating conditions of the engine.
As the requirements for the engine to deliver more performance and cleaner exhaust gases increase,
it becomes necessary to control the air-fuel ratio in a more precise and finely tuned manner. To accommodate this need, this model has adopted an electronically controlled fuel injection (FI) system, in place
of the conventional carburetor system. This system can achieve an optimum air-fuel ratio required by
the engine at all times by using a microprocessor that regulates the fuel injection volume according to
the engine operating conditions detected by various sensors.
The adoption of the FI system has resulted in a highly precise fuel supply, improved engine response,
better fuel economy, and reduced exhaust emissions.
5
4
3
2
1
1. Cylinder identification sensor
2. Accelerator position sensor
3. Throttle servo motor
4. Intake air temperature sensor
5. Engine trouble warning light
6. Intake funnel servo motor
7. Air induction system solenoid
8. Atmospheric pressure sensor
9. Intake air pressure sensor
10.ECU (engine control unit)
11.Battery
12.Lean angle sensor
13.Fuel pump
14.EXUP servo motor
6
7
8
9
10
11
12
17181920212217 18
16
15. Rear wheel sensor
16. O
sensor
2
17.Ignition coil
18. Spark plug
19.Crankshaft position sensor
20. Fuel injector
21. Throttle position sensor
22. Coolant temperature sensor
13
14
15
1-2
FEATURES
EAS2S31083
FI SYSTEM
The fuel pump delivers fuel to the fuel injector via the fuel filter. The pressure regulator maintains the
fuel pressure that is applied to the fuel injector at only 324 kPa (3.24 kgf/cm², 47.0 psi). Accordingly,
when the energizing signal from the ECU energizes the fuel injector, the fuel passage opens, causing
the fuel to be injected into the intake manifold only during the time the passage remains open. Therefore, the longer the length of time the fuel injector is energized (injection duration), the greater the volume of fuel that is supplied. Conversely, the shorter the length of time the fuel injector is energized
(injection duration), the lesser the volume of fuel that is supplied.
The injection duration and the injection timing are controlled by the ECU. Signals that are input from the
throttle position sensor, accelerator position sensor, coolant temperature sensor, cylinder identification
sensor, atmospheric pressure sensor, lean angle sensor, crankshaft position sensor, intake air pressure sensor, intake air temperature sensor, rear wheel sensor and O
mine the injection duration. The injection timing is determined through the signals from the crankshaft
position sensor. As a result, the volume of fuel that is required by the engine can be supplied at all times
in accordance with the driving conditions.
20
16
1
A
C
sensor enable the ECU to deter-
2
65
7
8
4
9
#3#1 #2 #4
18
17
1. Fuel pump
2. Injector
3. Cylinder identification sensor
4. ECU (engine control unit)
5. Throttle position sensor
6. Accelerator position sensor
7. Rear wheel sensor
8. Lean angle sensor
9. Atmospheric pressure sensor
10.O
sensor
2
11.Catalytic converter
12.Coolant temperature sensor
12
19
2
3
10
11
B
15
14
13
13.Crankshaft position sensor
14. Intake air pressure sensor
15. Throttle body
16.Intake air temperature sensor
17.Air filter case
18.Intake funnel servo motor
19.Throttle servo motor
20.Atmospheric pressure sensor
A. Fuel system
B. Air system
C. Control system
1-3
FEATURES
EAS2S31084
OUTLINE OF THE ABS
1. The Yamaha ABS (anti-lock brake system) features an electronic control system, which acts on the
front and rear brakes independently.
2. The ABS features a compact and lightweight design to help maintain the basic maneuverability of
the vehicle.
3. The hydraulic unit assembly, which is the main component of the ABS, is centrally located on the
vehicle to increase mass centralization.
ABS layout
3,4
6
A
13
12
1. ABS ECU fuse
2. ABS test coupler
3. Hydraulic unit assembly
4. ABS solenoid fuse
5. ABS motor fuse
6. ABS warning light
7. Front wheel sensor
1 53,4
2
A
7
8
91011
8. Front wheel sensor rotor
9. Right front brake caliper
10. Left front brake caliper
11.Rear brake caliper
12. Rear wheel sensor
13. Rear wheel sensor rotor
ABS
The operation of the Yamaha ABS brakes is the same as conventional brakes on other vehicles, with
a brake lever for operating the front brake and a brake pedal for operating the rear brake.
When wheel lock is detected during emergency braking, hydraulic control is performed by the hydraulic
system on the front and rear brakes independently.
1-4
FEATURES
Useful terms
• Wheel speed:
The rotation speed of the front and rear wheels.
• Chassis speed:
The speed of the chassis.
When the brakes are applied, wheel speed and chassis speed are reduced. However, the chassis
travels forward by its inertia even though the wheel speed is reduced.
• Brake force:
The force applied by braking to reduce the wheel speed.
• Wheel lock:
A condition that occurs when the rotation of one or both of the wheels has stopped, but the vehicle
continues to travel.
• Side force:
The force on the tires which supports the vehicle when cornering.
• Slip ratio:
When the brakes are applied, slipping occurs between the tires and the road surface. This causes a
difference between the wheel speed and the chassis speed.
Slip ratio is the value that shows the rate of wheel slippage and is defined by the following formula.
Chassis speed –
Slip ratio =
Wheel speed
Chassis speed
× 100 (%)
0%: There is no slipping between the wheel and the road surface. The chassis speed is equal to the
wheel speed.
100%: The wheel speed is “0”, but the chassis is moving (i.e., wheel lock).
Brake force and vehicle stability
When the brake pressure is increased, wheel speed is reduced. Slipping occurs between the tire and
the road surface and brake force is generated. The limit of this brake force is determined by the friction
force between the tire and the road surface and is closely related to wheel slippage. Wheel slippage is
represented by the slip ratio.
Side force is also closely related to wheel slippage. See figure “A”. If the brakes are applied while keeping the proper slip ratio, it is possible to obtain the maximum brake force without losing much side force.
ABS allows full use of the tires’ capabilities even on slippery road surfaces or less slippery road surfaces. See figure “B”.
1-5
FEATURES
A
a
B
a
a. Friction force between the tire and road
surface
b. Brake force
c. Side force
d. Slip ratio (%)
b
c
d
e
f
g
d
e. Less slippery road surface
f. Controlling zone
g. Slippery road surface
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 the 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 tendency to lock.
When the wheel slip and the wheel speed reduction rate exceed the preset values, the ABS ECU determines that the wheel has a tendency to lock.
If the slip is large and the wheel has a tendency to lock (point A in the following figure), the ABS ECU
reduces the brake fluid pressure in the brake caliper. Once the ABS ECU determines that the tendency
of the wheel to lock has diminished after the brake fluid pressure is reduced, it increases the hydraulic
pressure (point B in the following figure). The hydraulic pressure is initially increased quickly, and then
it is increased gradually.
1-6
FEATURES
T
a
b
A
B
A
B
A
B
A
c
A
B
ddede
a. Chassis speed
b. Wheel speed
c. Brake force
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.
IP
When the ABS is activated, a pulsating action may be felt at the brake lever or brake pedal, but this
does not indicate a malfunction.
e
B
d. Depressurizing phase
e. Pressurizing phase
A
B
The higher the side force on a tire, the less traction there is available for braking. This is true whether
the vehicle is equipped with ABS or not. Therefore, sudden braking while cornering is not recommended. Excessive side force, which ABS cannot prevent, could cause the tire to slip sideways.
EWA2S31031
WARNING
The braking of the vehicle, even in the worst case, is principally executed when the vehicle is
advancing straight ahead. During a turn, sudden braking is liable to cause a loss of traction of
the tires. Even in vehicles equipped with ABS, overturning of the vehicle cannot be prevented
if it is braked suddenly.
The ABS functions to prevent the tendency of the wheel to lock by controlling the brake fluid pressure.
However, if there is a tendency of the wheel to lock on a slippery road surface, due to engine braking,
the ABS may not be able to prevent the wheel from locking.
EWA13870
WARNING
The ABS controls only the tendency of the wheel to lock caused by applying the brakes. The
ABS cannot prevent wheel lock on slippery surfaces, such as ice, when it is caused by engine
braking, even if the ABS is operating.
1-7
FEATURES
a. Friction force between the tire and road
surface
b. Brake force
Electronic ABS features
The Yamaha ABS (anti-lock brake system) has been developed with the most advanced electronic
technology.
The ABS control is processed with good response under various vehicle travel conditions.
The ABS also includes a highly developed self-diagnosis function. The ABS detects any problem condition and allows normal braking even if the ABS is not operating properly.
When this occurs, the ABS warning light on the meter assembly 1 comes on.
The ABS stores the fault codes in the memory of the ABS ECU for easy problem identification and troubleshooting.
c. Side force
d. Slip ratio (%)
1-8
ABS block diagram
FEATURES
1
3
2
44
566
77
10
11
1. Rear brake master cylinder
2. Hydraulic unit assembly
3. Front brake master cylinder
4. Inlet solenoid valve
5. ABS motor
6. Hydraulic pump
7. Outlet solenoid valve
8. ABS ECU
EAS2S31085
ABS COMPONENT FUNCTIONS
8
99
13
14
12
9. Buffer chamber
10.Rear brake caliper
11. Rear wheel sensor
12.ABS warning light
13.Front brake calipers
14.Front wheel sensor
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 a Hall IC. 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.
1-9
FEATURES
The front and rear sensor rotors each have 92 magnetic poles (46 pairs) and are installed close to the
wheel sensors. As the sensor rotor rotates, the Hall element in the Hall IC installed in the wheel sensor
generates pulses. The pulse frequency, which is proportional to the magnetic flux density, is converted
into a wave in the Hall IC so that it can be output.
The ABS ECU calculates the wheel rotation speed by detecting the pulse frequency.
2
2
1
1
7
3
7
4
88
5
6
3. At low speed
4. At high speed
5. Wheel sensor
6. Wheel sensor rotor
7. Voltage
8. Time
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 turned 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
properly.
ECA2S31063
NOTICE
If the rear wheel is raced with the vehicle on a suitable stand, the ABS warning light may flash
or come on. If this occurs, turn the main switch to “OFF”, then back to “ON”. The ABS operation
is normal if the ABS warning light comes on for 2 seconds, then goes off.
1-10
1
FEATURES
Hydraulic unit assembly
The hydraulic unit assembly “1” is composed of hydraulic control valves (each with a outlet solenoid
valve and inlet solenoid valve), buffer chambers, hydraulic pumps, an ABS motor, and ABS ECU. The
hydraulic unit adjusts the front and rear wheel brake fluid pressure to control the wheel speed according
to signals transmitted from the ABS ECU.
1
• Hydraulic control valve
The hydraulic control valve is composed of a inlet solenoid valve and outlet solenoid valve.
The electromagnetic force generated in the inlet solenoid valve varies proportionally with the duty cycle control voltage that is supplied to it. Since this voltage is continuously variable, the solenoid valve
moves smoothly and the hydraulic pressure is adjusted linearly.
1. When the brakes are operated normally, the inlet solenoid valve “1” is open and the outlet solenoid
valve “2” is closed. The brake line between the brake master cylinder and brake caliper is open.
1
2. When the ABS is activated, the inlet solenoid valve “1” closes and the outlet solenoid valve “2”
opens using the power supplied from the ABS ECU signals. This reduces the hydraulic pressure.
1
3. When the ABS ECU sends a signal to stop reducing the hydraulic pressure, the outlet solenoid
valve “2” closes and the brake fluid is pressurized again. The inlet solenoid valve “1” controls the
hydraulic pressure difference between the brake fluid in the upper brake lines (brake master cylinder side) and the brake fluid in the lower brake lines (brake caliper side).
2
2
1-11
FEATURES
1
• Buffer chamber
The buffer chamber accumulates the brake fluid that is depressurized while the ABS is operating.
1. Buffer chamber (pressurizing phase)
2. Buffer chamber (depressurizing phase)
3. Raised piston
2
1-12
FEATURES
• ABS ECU
The ABS ECU is integrated with the hydraulic unit to achieve a compact and lightweight design.
As shown in the block following diagram, the ABS ECU receives wheel sensor signals from the front
and rear wheels and also receives signals from other monitor circuits.
8
7
5
30
29
4
2
1
28
27
3
10
11
6
12
14
15
31
9
17
18 1916
13
20
26
25
24
1. Battery
2. AC magneto
3. Rectifier/regulator
4. Main fuse
5. Main switch
6. ABS ECU fuse
7. ABS motor fuse
8. ABS solenoid fuse
9. Front brake light switch
10.Rear brake light switch
11.Tail/brake light
12.Hydraulic unit assembly
13.ABS ECU
14.Solenoid relay
15.ABS motor relay
16.Front brake inlet solenoid
21
22
23
17.Front brake outlet solenoid
18.Rear brake inlet solenoid
19.Rear brake outlet solenoid
20.ABS motor
21.Meter assembly 1
22.ABS warning light
23.Speedometer
24.ABS test coupler
25. Rear wheel sensor
26.Front wheel sensor
27. Start switch
28. Starting circuit cut-off relay
29. Starter motor
30. Starter relay
31.ECU (engine control unit)
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.
1-13
FEATURES
T
IP
• Some types of malfunctions are not recorded in the memory of the ABS ECU (e.g., a blown ABS ECU
fuse).
• The ABS performs a self-diagnosis test for a few seconds each time the vehicle first starts off after the
main switch was turned on. During this test, a “clicking” noise can be heard from under the seat, and
if the brake lever or brake pedal are even slightly applied, a vibration can be felt at the lever and pedal,
but these do not indicate a malfunction.
1
2
3
4
5
6
7
8
1. Software operation flow
2. Main switch “ON”
3. Initialize
4. Self-diagnosis (when static)
5. Self-diagnosis (when riding)
EAS2S31086
6. Receive signals
7. Control operation
8. Depressurize/pressurize
ABS OPERATION
The ABS hydraulic circuit consists of two systems: the front wheel, and rear wheel. The following describes the system for the front wheel only.
1-14
FEATURES
Normal braking (ABS not activated)
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 brake master cylinder increases and the brake fluid is sent
to the brake caliper.
At this time, the inlet and outlet check valves of the hydraulic pump are closed. As a result of eliminating
the orifice, the brake master cylinder directly pressurizes the brake caliper during normal braking. When
the brake lever is released, the brake fluid in the brake caliper returns to the brake master cylinder.
3
4
8
12
1. Brake master cylinder
2. Brake light switch
3. ABS motor
4. Hydraulic pump
5. Buffer chamber
6. Outlet solenoid valve
7. Inlet solenoid valve
8. Brake caliper
9. Wheel sensor
10.ABS ECU
11.ABS warning light
12.Brake fluid pressure
13.Time
13
7
6
5
9
10
11
1-15
FEATURES
Emergency braking (ABS activated)
1. Depressurizing phase
When the front 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 solenoid valve compresses the
spring and 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
caliper is reduced.
The brake fluid stored in the buffer chamber is pumped back to the brake master cylinder by the hydraulic pump linked to the ABS motor.
3
4
8
12
1. Brake master cylinder
2. Brake light switch
3. ABS motor
4. Hydraulic pump
5. Buffer chamber
6. Outlet solenoid valve
7. Inlet solenoid valve
8. Brake caliper
9. Wheel sensor
10.ABS ECU
11.ABS warning light
12.Brake fluid pressure
13.Time
13
7
6
5
9
10
11
1-16
FEATURES
2. Pressurizing phase
The outlet solenoid valve is closed by the “pressurization” signal transmitted from the ABS ECU. At
this time, the ABS ECU controls the opening of the inlet solenoid valve. As the inlet solenoid valve
opens, the brake line from the brake master cylinder opens, allowing the brake fluid to be sent to the
brake caliper.
3
4
8
12
1. Brake master cylinder
2. Brake light switch
3. ABS motor
4. Hydraulic pump
5. Buffer chamber
6. Outlet solenoid valve
7. Inlet solenoid valve
13
7
6
5
9
10
11
8. Brake caliper
9. Wheel sensor
10.ABS ECU
11.ABS warning light
12.Brake fluid pressure
13. Time
EAS2S31087
ABS SELF-DIAGNOSIS FUNCTION
ABS warning light
The ABS warning light “1” comes on when a malfunction is detected by the ABS self-diagnosis. It is
located in the meter assembly 1.
1-17
FEATURES
1
Instances when the ABS warning light comes on
1. The ABS warning light comes on when the main switch is turned to “ON”.
The ABS warning light comes on for 2 seconds while the ABS is performing a self-diagnosis, then
goes off if there are no problems.
b
a
c
d
e
d
f
a. ABS warning light
b. Main switch “OFF”
c. Main switch “ON”
d. Goes off
e. Comes on for 2 seconds
f. ABS self-diagnosis
2. The ABS warning light comes on while the start switch is being pushed.
When the engine is being started, the ABS warning light comes on while the start switch is being
pushed. (Refer to “ELECTRIC STARTING SYSTEM” on page 8-7.)
bc d
a
f
g
ffh
e
i
a. ABS warning light
b. Main switch “OFF”
c. Main switch “ON”
d. Start switch “ON”
e. Start switch “OFF”
f. Goes off
g. Comes on for 2 seconds
h. Comes on while the start switch is being
pushed
i. ABS self-diagnosis
3. The ABS warning light comes on while riding.
If the ABS warning light comes on while riding, a malfunction has been detected in the ABS. The
ABS hydraulic control will not be performed. The ABS will have recourse to manual braking if this
occurs.
1-18
FEATURES
T
T
a
a. ABS warning light
b. Comes on
b
4. The ABS warning light flashes while riding.
If the ABS warning light flashes while riding, there is no problem with the function of the ABS. However, the ABS ECU input has unstable factors. (For details, refer to “ABS TROUBLESHOOTING
OUTLINE” on page 8-87.)
IP
The ABS warning light comes on or flashes if the vehicle is ridden with the test coupler adapter connected to the ABS test coupler.
b
c
a
d
a. ABS warning light
b. Comes on
c. Goes off
d. Unstable ABS ECU input
5. The ABS warning light “1” flashes and a fault code “2” is indicated on the multi-function display when
the test coupler adapter “3” is connected to the ABS test coupler “4” for troubleshooting the ABS.
The ABS test coupler can be accessed by removing left side cover.
When the test coupler adapter is connected to the ABS test coupler, the ABS warning light starts
flashing and the multi-function display indicates all the fault codes recorded in the ABS ECU.
Test coupler adapter
90890-03149
IP
The ABS warning light comes on or flashes if the vehicle is ridden with the test coupler adapter connected to the ABS test coupler.
1-19
FEATURES
1
4
2
EAS2S31088
ABS WARNING LIGHT AND OPERATION
ABS warning light
• When the main switch is turned to “ON”, the ABS warning light comes on for 2 seconds, then goes off.
• The ABS warning light comes on while the start switch is being pushed.
• If the ABS warning light comes on while riding, stop the vehicle, and then turn the main switch to
“OFF”, then back to “ON”. The ABS operation is normal if the ABS warning light comes on for 2 sec-
onds, then goes off.
• If the rear wheel is raced with the vehicle on a suitable stand, the ABS warning light may flash or come
on. If this occurs, turn the main switch to “OFF”, then back to “ON”. The ABS operation is normal if the
ABS warning light comes on for 2 seconds, then goes off.
• The ABS operation is normal if the ABS warning light flashes.
• Even if the ABS warning light remains on and does not go off, or if it comes on after riding, conven-
tional braking performance of the vehicle is maintained.
1-20
FEATURES
ABS function
EWA2S31036
WARNING
• When hydraulic control is performed by the ABS, the brake system alerts the rider that the
wheels have a tendency to lock by generating a reaction-force pulsating action in the brake
lever or brake pedal. When the ABS is activated, the grip between the road surface and tires
is close to the limit. The ABS cannot prevent wheel lock* on slippery surfaces, such as ice,
when it is caused by engine braking, even if the ABS is activated.
Use extreme care when operating the vehicle under these conditions.
• The ABS is not designed to shorten the braking distance or improve the cornering performance.
• Depending on the road conditions, the braking distance may be longer compared to that of
vehicles not equipped with ABS. Therefore, ride at a safe speed and keep a safe distance between yourself and other vehicles.
• The braking of the vehicle, even in the worst case, is principally executed when the vehicle is
advancing straight ahead. During a turn, sudden braking is liable to cause a loss of traction of
the tires. Even vehicles equipped with ABS cannot be prevented from falling over if braked
suddenly.
• The ABS does not work when the main switch is turned to “OFF”. The conventional braking
function can be used.
* Wheel lock: A condition that occurs when the rotation of one or both of the wheels has
stopped, but the vehicle continues to travel.
1-21
Loading...