Yamaha R15 2022 Service Manual page 446

Fault code
Item
No.
14* Rear wheel sensor
27* (abnormal pulse pe-
riod)
15 Front wheel sensor
(open or short cir-
cuit)
16 Rear wheel sensor
(open or short cir-
cuit)
ABS (ANTI-LOCK BRAKE SYSTEM)
Symptom
Rear wheel sensor
signal is not re-
ceived properly.
(The pulse period is
abnormal while the
vehicle is traveling.)
Open or short cir-
cuit is detected in
the front wheel sen-
sor.
Open or short cir-
cuit is detected in
the rear wheel sen-
sor.
Check point
• Foreign material
adhered around
the rear wheel
sensor
• Incorrect installa-
tion of the rear
wheel
• Defective sensor
rotor or incorrect
installation of the
rotor
• Defective rear
wheel sensor or in-
correct installation
of the sensor
• Defective coupler
between the front
wheel sensor and
the hydraulic unit
assembly
• Open or short cir-
cuit in the wire har-
ness between the
front wheel sensor
and the hydraulic
unit assembly
• Defective front
wheel sensor or
hydraulic unit as-
sembly
• Defective coupler
between the rear
wheel sensor and
the hydraulic unit
assembly
• Open or short cir-
cuit in the wire har-
ness between the
rear wheel sensor
and the hydraulic
unit assembly
• Defective rear
wheel sensor or
hydraulic unit as-
sembly
8-113
ELEC –
Fail-safe system
Diag-
Start- Driving
nostic
ing the the ve-
code
engine hicle
Able Able —
Able Able —
Able Able —
+