Yamaha XSR900 2022, Service Manual

Page: 552 / 726

9-146
P020 3
EAS20576
P020 3
EAS33056
TROUBLESHOOTING
Item
Injector #3: malfunction in injector #3. Normal signal is not received from the injector circuit.
Fail-safe system
• Able to start engine (depending on the number of faulty cylinder)
• Able to drive vehicle (depending on the number of faulty cylinder)
Procedure
1. Connection of injector #3 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. Defective injector #3.
• Measure the injector resistance.
Refer to “CHECKING THE FUEL INJECTORS” on page 8-49.
3. Connection of 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).
Is the coupler condition normal?
YES
→
Go to step 2.
NO
a. Connect the coupler securely or replace the wire harness.
b. Execute the diagnostic mode. (Code 38)
Is it hear operating sound?
YES
→
Go to step 6.
NO
→
Go to step 2.
Is check result OK?
YES
→
Go to step 3.
NO
a. Replace the injector #3.
Refer to “THROTTLE BODIES” on page 7-6.
b. Execute the diagnostic mode. (Code 38)
Is it hear operating sound?
YES
→
Go to step 6.
NO
→
Go to step 3.