Yamaha FJR13AY 2009 Service Manual page 626

Fault code No. AbS_14
AbS_27
Order Item/components and probable
cause
1 Installed condition of wheel sensor.
2 Installed condition of wheel bearings,
axle, sensor housing, and sensor ro-
tor.
3 Foreign material inside sensor hous-
ing.
4 Defective sensor rotor.
5 Hydraulic unit assembly internal mal-
function.
TIP
Vehicle possibly ridden on uneven roads.
Fault code No. AbS_15
Order Item/components and probable
cause
1 Connections
• Front wheel sensor coupler
• ABS ECU coupler
ABS (ANTI-LOCK BRAKE SYSTEM)
Symptom Incorrect signal from the rear wheel sensor is
detected.
Check or maintenance job
Check for looseness. Repair or
replace the wheel sensor if nec-
essary.
Check the components for loose-
ness, distortion, and bends.
Refer to "CHECKING THE REAR
WHEEL" on page 4-28.
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
4-28.
Check the surface of the sensor
rotor for damage. If there is visi-
ble damage, replace the sensor
rotor.
Refer to "MAINTENANCE OF
THE REAR WHEEL SENSOR
AND SENSOR ROTOR" on page
4-28.
Replace the hydraulic unit as-
sembly.
Symptom No continuity in the front wheel sensor circuit.
Check or maintenance job
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
TIP
Turn the main switch to "OFF" be-
fore disconnecting or connecting
a coupler.
8-143
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.
Reinstatement
confirmation
method
Turn the main
switch to "ON"
and check that
the ABS warn-
ing light comes
on for 2 sec-
onds, then
goes off.