Yamaha TMAX 2020 Service Manual page 629

EAS20617
P1604, P1605
EAS33097
TROUBLESHOOTING
Item
• [P1604] Lean angle sensor: ground short circuit detected.
• [P1605] Lean angle sensor: open or power short circuit.
Fail-safe system
• Unable to start engine
• Unable to drive vehicle
Procedure
1. Connection of lean angle 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 2.
NO
a. Connect the coupler securely or replace the wire harness.
b. Push the ON/start switch, then to "OFF", and then back to "ON".
c. Check the condition of the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
Go to step 6, 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. Push the ON/start switch, then to "OFF", and then back to "ON".
c. Check the condition of the DTC using the malfunction mode of the YDT.
Is it in the "Recovered" condition?
YES
Go to step 6, and complete the service.
NO
Go to step 3.
3. Wire harness continuity.
• Disconnect the lean angle sensor coupler and ECU coupler.
• Open circuit check
9-155
P1604, P1605