Fault Code Abs_14; Fault Code Abs_27; Fault Code Abs_15 - Yamaha FZ8NA Service Manual

ABS_14
Fault code No.
ABS_27
Item/components and probable
Order
cause
1 Installed condition of wheel sensor.
2 Installed condition of wheel bearings,
axle, sensor housing, and sensor
rotor.
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
Item/components and probable
Order
cause
1 Connections
• Front wheel sensor coupler
• ABS ECU coupler
ABS (ANTI-LOCK BRAKE SYSTEM)
Incorrect signal from the rear wheel sensor is
Symptom
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 4-24.
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
4-25.
Check the surface of the sensor
rotor for damage. If there is visible
damage, replace the sensor rotor.
Refer to "MAINTENANCE OF
THE REAR WHEEL SENSOR
AND SENSOR ROTOR" on page
4-25.
Replace the hydraulic unit assem-
bly.
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
securely.
TIP
Turn the main switch to "OFF"
before disconnecting or connect-
ing a coupler.
8-148
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 trial
run at a con-
stant 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.