Yamaha 2008 Fazer FZ1-N Service Manual page 487

• ABS ECU coupler terminal is disconnected. → [D-1]
2. ABS warning light goes on for 2 seconds then goes off.
1. With the rear wheel stopped, the front wheel was rotated at a speed faster than 11 km/h. This
is not a malfunction.
2. Signal is not generated at the rear wheel sensor.
• Rear wheel sensor is not installed properly. → [D-4]
• Rear wheel sensor rotor is defective. → [D-4]
3. Rear wheel sensor circuit is short-circuited.
• Rear sensor or lead is short-circuited. → [D-4]
• Wire harness (ABS) sensor circuit is short-circuited. → (Refer to "CIRCUIT DIAGRAM (FZ1-
SA)" on page 8-89.)
4. Rear wheel sensor output drops.
• Sensor signal output may drop due to failure of the bearing, wheel, or brake caliper bracket of
the rear wheel. Check these components when installed for looseness, distortion, and bends.
NOTE:
If the vehicle is ridden on extremely uneven roads continuously, the ABS warning light may flash and
malfunction code 11 or 12 may be recorded depending on the condition.
Malfunction code 13 (front wheel) and malfunction code 14 (rear wheel) (Incorrect signal is
detected by the front (13) or rear (14) wheel sensor.)
1. The wheel sensors or sensor rotors are not properly installed.
1. Installation of the front or rear wheel sensor
• Check that the wheel sensor is properly installed in the housing. → [D-3, 4]
• Check if there is looseness between the housing and the front wheel. → [D-3, 4]
• Check if there is looseness rear brake caliper bracket and the rear wheel. → [D-3, 4]
2. Installation of the front or rear wheel sensor rotor
• Check that the sensor rotor is correctly pressed in the front wheel. → [D-3, 4]
• Check that the sensor rotor is correctly install to the rear wheel. → [D-3, 4]
• Check the rotor and inside the rotor housing for foreign materials. → [D-3, 4]
2. Teeth surfaces of the sensor rotors are defective.
• Check for flaws on the teeth surfaces of the front or rear wheel sensor rotors.
Also, check for any foreign materials. → [D-3, 4]
3. Sensor output has dropped.
• Sensor signal output may drop due to failure of the bearings, wheel axle, rear brake caliper
bracket wheel or sensor housing of (front) the front or rear wheel. Check these components
when installed for looseness, distortion, and bends.
Malfunction code 15 (front wheel sensor) and malfunction code 16 (rear wheel sensor) (No
continuity in the front or rear wheel sensor circuits.)
Broken front or rear wheel sensor circuit is detected.
• Front or rear wheel sensor coupler is broken. → [D-3, 4]
• Front or rear wheel sensor or lead is broken. → [D-3, 4]
• Sub-wire harness (ABS) sensor circuit is broken. → (Refer to "CIRCUIT DIAGRAM (FZ1-SA)" on
page 8-89.)
• Sub-wire harness (ABS) is disconnected from the ABS ECU coupler terminal. → [D-1]
NOTE:
• Check that both the front and rear wheel sensor couplers are connected securely.
• If the vehicle is ridden after malfunction code 15 (front wheel sensor) or 16 (rear wheel sensor) is
displayed, the malfunction code will be overwritten from 15 to 11 (front wheel sensor signal) or
from 16 to 12 (rear wheel sensor signal).
ABS (ANTI-LOCK BRAKE SYSTEM)
8-118