P1606, P1607; Troubleshooting - Yamaha MT-09 2021 Service Manual

EAS20787

P1606, P1607

EAS33530

TROUBLESHOOTING

Item
• [P1606] Intake air pressure sensor 2: ground short circuit detected.
• [P1607] Intake air pressure sensor 2: open or power short circuit detected.
Fail-safe system
• Able to start engine
• Able to drive vehicle
Procedure
1. Connection of intake air pressure sensor 2 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. Turn the main switch to "ON", and then check the condition of the DTC using the malfunction
mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 7, and complete the service.
NO
→ Go to step 2.
2. 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 3.
NO
a. Connect the coupler securely or replace the wire harness.
b. Turn the main switch to "ON", and then check the condition of the DTC using the malfunction
mode of the YDT.
Is it in the "Recovered" condition?
YES
→ Go to step 7, and complete the service.
NO
→ Go to step 3.
3. Wire harness continuity.
• Disconnect the intake air pressure sensor 2 coupler "1" and ECU coupler "3".
• Remove the joint coupler cap "2".
• Open circuit check
9-235
P1606, P1607