Yamaha TMAX 2020 Service Manual

9-2SELF-DIAGNOSTIC FUNCTIONEAS32859CHECKING THE WARNING LIGHTThe warning light comes on after the ON/start switch has been pushed on. Refer to the following tablefor lighting up time.If the warning light still comes on, refer to a check item of a troubleshooting of each system, check andrepair it. If the warning light does not come on, the warning light (LED) may be defective.TIP• This engine equips self-diagnostic function. It’s controlled delicately for detecting defective and mal-function of the exhaust emission control system. Therefore, the vehicle modifying, poor maintenance,and improper using of the vehicle may also become the cause of the MIL come on. These events maycause the occurrence of the warning light coming on without malfunction.• Reprogramming of the ECU software.• Using the electrical accessory which may affect the ECU.• Using the incorrect specification of spark plug and fuel injector. Using the third party accessories suchas suspension and exhaust system.• Change of specifications of drive belt, drive pulley, wheel and tire.• Removing or modifying the O2 sensor, the exhaust system part (catalyst, etc.).• Poor maintenance of the drive belt and tire air pressure.• Incorrect brake lever position, rear brake dragging.• Excessive opening and closing of the throttle grip, frequently used of burnout, wheelie and half clutch.• Air mixture by fuel supply badness.System Lighting up warning light Lighting timeFUEL INJECTION SYSTEM MIL “2” 2.0 secondsABS (Anti-lock Brake Sys-tem) ABS warning light “1” *1CRUISE CONTROL SYS-TEM (for XP560D) MIL “2” 2.0 seconds21