Yamaha TMAX 2020 Service Manual page 651

EAS20708
17, 45_ABS
EAS33372
TROUBLESHOOTING
Item
Front wheel sensor (missing pulses)
Procedure
TIP
If pulse gaps are detected when the vehicle is traveling at a speed of 30 km/h (19 mi/h) or more, DTC
No. 17 will be recorded. If the vehicle is traveling at a speed of 29 km/h (18 mi/h) or less, DTC No. 45
will be recorded first and DTC No. 17 will be recorded if the condition continues.
1. Foreign material adhered around the front wheel sensor
• Check the surface of the sensor rotor and wheel sensor for foreign material, such as metal particles.
Is check result OK?
YES
 Go to step 2.
NO
 Clean the sensor rotor and wheel sensor.
2. Incorrect installation of the front wheel
• Check the components for looseness, distortion, and bends.
Refer to "CHECKING THE FRONT WHEEL" on page 4-24.
Is check result OK?
YES
 Go to step 3.
NO
 Replace the wheel axle, tire, front wheel, wheel bearings or oil seals.
3. Defective sensor rotor or incorrect installation of the rotor
• Check the surface of the sensor rotor for damage.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page 4-
26.
Is check result OK?
YES
 Go to step 4.
NO
 Replace the sensor rotor.
4. Defective front wheel sensor or incorrect installation of the sensor
• Check the wheel sensor for damage and the installed condition of the sensor.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page 4-
26.
Is check result OK?
YES
 Replace the hydraulic unit assembly (ABS ECU).
NO
 Repair or replace the wheel sensor.
9-177
17, 45_ABS