Yamaha TMAX 2020 Service Manual

9-69P0030EAS20397P0030EAS33134TROUBLESHOOTINGItemO2 sensor heater: defective heater controller detected.Fail-safe system• Able to start engine• Able to drive vehicleProcedureTIPIf more than one DTC is detected at the same time, perform troubleshooting of DTC listed below first.• P0112, P0113, P0122, P0123, P0222, P0223, P21351. Connection of O2 sensor coupler.• Check the locking condition of the coupler.• Disconnect the coupler and check the pins (bent or broken terminals and locking condition of thepins).TIPFor this check, also set the engine stop switch to “ON”.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 thepins).Is the coupler condition normal?YES Go to step 2.NOa. Connect the coupler securely or replace the wire harness.b. Push the ON/start switch, and then check the condition of the DTC using the malfunction modeof the YDT.Is it in the “Recovered” condition?YES Go to step 6, and complete the service.NO Start the engine, and then check the condition of the DTC.Is it in the “Recovered” condition?YES Go to step 6, and complete the service.NO Go to step 2.