Yamaha MT-09 2021 - 54_Immobilizer; Troubleshooting

9-269
54_IMMOBILIZER
EAS20682
54_IMMOBILIZER
EAS33311
TROUBLESHOOTING
Item
Codes transmitted between the ECU and the immobilizer unit do not match.
Cause
• Disconnected lead/cable.
• Immobilizer unit malfunction.
• ECU failure. (The ECU or immobilizer unit was replaced with a used unit from another vehicle.)
• ECU malfunction.
Procedure
TIP
When a system malfunction occurs, the immobilizer system indicator light will flash. The DTC can be
identified by the flashing pattern. Refer to “HOW TO CHECK DTC” on page 9-27.
1. Connection of Immobilizer unit coupler and 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).
2. Turn the main switch to “ON”.
3. Register the code re-registering key and standard keys.
• Turn the main switch to “ON”.
4. Replace the main switch/immobilizer unit.
Refer to “HANDLEBAR” on page 4-57.
• Turn the main switch to “ON”.
Is the coupler condition normal?
YES
→ Go to step 2.
NO
→ Connect the coupler securely or replace the wire harness.
Is DTC displayed?
YES
→ Go to step 3.
NO
→ Service is completed.
Is DTC displayed?
YES
→ Go to step 4.
NO
→ Service is completed.
Is DTC displayed?
YES
→ Go to step 5.
NO
→ Service is completed.