Yamaha YZF-R1 Series Service Manual page 779

EAS20696
43, 45_ABS
EAS33330
TROUBLESHOOTING
Item
Front wheel sensor (missing pulses)
Procedure
TIP
After the DTC 45 is recorded, DTC 43 will be recorded if a certain speed and time are exceeded.
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 4-38.
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
4-40.
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
4-40.
Is check result OK?
YES
→ Replace the hydraulic unit assembly (ABS ECU).
NO
→ Repair or replace the wheel sensor.
9-282
43, 45_ABS