Yamaha TMAX 2020 Service Manual

9-33ABS (Anti-lock Brake System)Self-diagnosis with the ABS ECUThe ABS ECU performs a static check of the entire system when the ON/start switch is pushed. It alsochecks for malfunctions while the vehicle is ridden. Since all malfunctions are recorded after they aredetected, it is possible to check the recorded malfunction data by utilizing the YDT when the ABS ECUhas entered the self-diagnosis mode.TIPThe ABS performs a self-diagnosis test for a few seconds each time the vehicle first starts off after theON/start switch was pushed. During this test, a “clicking” noise can be heard from front side of the ve-hicle, and if the front brake lever and rear brake lever are even slightly applied, a vibration can be feltat the levers, but these do not indicate a malfunction.Special precautions for handling and servicing a vehicle equipped with ABSNOTICEECA17620Care should be taken not to damage components by subjecting them to shocks or pulling onthem with too much force since the ABS components are precisely adjusted.• The ABS ECU and hydraulic unit are united assemblies and cannot be disassembled.• The malfunction history is stored in the memory of the ABS ECU. Delete the DTC when the service isfinished. (This is because the past DTC will be displayed again if another malfunction occurs.)EAS32895BASIC INSTRUCTIONS FOR TROUBLESHOOTING1. Check the DTC of “malfunction” using the YDT.2. Check and repair the malfunction according to applicable DTC troubleshooting.3. Push the OFF/LOCK switch, and then push the ON/start switch, and then check the DTC of“malfunction” is not displayed.TIP• If another DTC is displayed, repeat steps (1) to (3) until no DTC is displayed.• Push the OFF/LOCK switch will not erase the malfunction history.4. Do the final check.WARNINGEWA17420• Perform the troubleshooting [A][B][C] in order. Be sure to follow the order since a wrongdiagnosis could result if the steps are followed in a different order or omitted.• Use sufficiently charged regular batteries only.