Yamaha VMAX 2009 Service Manual page 537

Fault code No. ABS-18
ABS-46
Order Item/components and probable
cause
1 Installed condition of wheel bearings,
axle, sensor housing, and sensor ro-
tor.
2 Foreign material inside sensor hous-
ing.
3 Defective sensor rotor.
Fault code No. ABS-21
Order Item/components and probable
cause
1 Open or short circuit in solenoid cir-
cuit.
ABS (ANTI-LOCK BRAKE SYSTEM)
Symptom Missing pulses detected in the rear wheel sen-
Check or maintenance job
Check the components for loose-
ness, distortion, and bends.
Refer to "CHECKING THE REAR
WHEEL" on page 4-24.
Check the interior of the sensor
housing and the surface of the
sensor rotor for foreign material,
such as metal particles. Clean
the sensor housing and sensor
rotor if necessary.
Refer to "MAINTENANCE OF
THE REAR WHEEL SENSOR
AND SENSOR ROTOR" on page
4-24.
• Check the surface of the sensor
rotor for damage.
• If there is visible damage, re-
place the sensor rotor.
Symptom Hydraulic unit solenoid circuit is open or short-
Check or maintenance job
Replace the hydraulic unit as-
sembly.
8-104
sor signal.
Reinstatement
confirmation
method
• Turn the main
switch to "ON"
and check
that the ABS
warning light
comes on for
2 seconds,
then goes off.
• Perform a tri-
al run at a
constant
speed of 30
km/h and
check that the
ABS warning
light does not
come on.
circuited.
Reinstatement
confirmation
method
• Turn the main
switch to "ON"
and check
that the ABS
warning light
comes on for
2 seconds,
then goes off.
• Perform hy-
draulic unit
operation test
1 and check
that the oper-
ation of the
hydraulic unit
is normal.