P2158; Troubleshooting - Yamaha MT-09 2021 Service Manual

EAS20633

P2158

EAS33113

TROUBLESHOOTING

Item
Front wheel sensor: no normal signals are received from the front wheel sensor.
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
1. Locate the malfunction.
• Check the ABS warning light.
Is the ABS warning light on?
YES
→ Refer to "BASIC INSTRUCTIONS FOR TROUBLESHOOTING" on page 9-43.
NO
→ Go to step 2.
2. Execute the diagnostic mode.
• Execute the diagnostic mode. (Code 16)
• Rotate the front wheel by hand and check that the indicated value increases.
Is that value increased?
YES
→ Go to step 10, and complete the service.
NO
→ Go to step 3.
3. Connection of front wheel sensor coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
Is the coupler condition normal?
YES
→ Go to step 4.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code 16)
c. Rotate the front wheel by hand and check that the indicated value increases.
Is that value increased?
YES
→ Go to step 10, and complete the service.
NO
→ Go to step 4.
4. Connection of ABS ECU coupler.
• Check the locking condition of the coupler.
• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of the
pins).
9-251
P2158