Yamaha FJR13AEV(C) Service Manual page 618

NOTE:
If the vehicle is continuously ridden on extremely uneven roads, the ABS warning light may flash and
malfunction code 11 or 12 may be recorded depending on the condition.
Malfunction codes 13/26 (front wheel) and 14/27 (rear wheel) (Incorrect signal from the front
(13/26) or rear (14/27) wheel sensor is detected.)
1. The wheel sensors or sensor rotors are not properly installed.
a. Installation of the front or rear wheel sensor
• Check that the wheel sensor is properly installed in the housing.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTE-
NANCE OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "IN-
STALLING THE REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
• Check if there is looseness between the housing and wheel.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTE-
NANCE OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "IN-
STALLING THE REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
b. Installation of the front or rear wheel sensor rotor
• Check that the sensor rotor is correctly pressed in the wheel.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTE-
NANCE OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "IN-
STALLING THE REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
• Check the rotor and inside the rotor housing for foreign materials.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTE-
NANCE OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "IN-
STALLING THE REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
2. Teeth surfaces of the sensor rotors are defective.
• Check if there are flaws on the surfaces of the sensor rotor teeth. Also, check for any foreign mate-
rials.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTE-
NANCE OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "INSTALL-
ING THE REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
3. Sensor output has dropped.
• Sensor signal output may drop due to failure of the bearings, wheel axle, wheel, or sensor housing
of the front or rear wheel. Check these components, without removing them, for looseness, distor-
tion, and bends.
Malfunction codes 15 (front wheel) and 16 (rear wheel) (No continuity in the front or rear wheel
sensor circuit.)
Broken front or rear wheel sensor circuit is detected.
• Front or rear wheel sensor coupler is disconnected.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTENANCE
OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "INSTALLING THE
REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
ABS (ANTI-LOCK BRAKE SYSTEM)
8-147