Background
Background: A 2020 YAMAHA ZY125T-15 motor, its instrument warning light is on and engine speed is a little bit high after washing throttle. DTC ID shows P0507 with description of 【[For FID/ISC valve]FID/ISC valve(stuck fully open)[For ETV]ldling failure】.
Maintenance Tips
Maintenance Tips:
It needs to learn about idle speed control after any maintenance below.
●Uninstall and install throttle
●clear throttle
●change throttle
●uninstall and install Idle speed controller
Solutions
Solutions: Using MS80 to operate on follow test:
【(54)ISC(idle speed control)valve/FID(fast idle solenoid)】
【(67)ISC correction value erasure】
【(87)Air-fuel control learning data erasure】
Detail Steps:
①Connect MS80 to Motorcycle, enter into【Moto Diag】;
②Click【All】, input letters such“YAM”in search bar, click【YAMAHA】;
③Click the newest YAMAHA edition；
④Click【Select from system】,【Auto Scan】；
⑤Turn off the ignition, click【Enter】;
⑥Turn on the ignition, click【Enter】;
⑦Turn off the ignition, click【Enter】;
⑧Turn on the ignition, click【Enter】;
⑨Turn off the ignition, click【Enter】;
⑩Turn on the ignition, click【Enter】;
⑪Click【Engine Control Unit】;
⑫Click【Special Function】, 【ldle speed learning】；
⑬Click【(54)ISC(idle speed control)valve/FID(fast idle solenoid)】;
⑭Click【Actuator Check】three times in 5 seconds;
⑮Operation successful, it shows 0;
⑯Click【(67)ISC correction value erasure】；
⑰Click【Actuator Check】three times in 5 seconds, then ISC correction value will be erased;
Notes:
00：the ISC correction value has been erased;
01：no need to erase the ISC correction value;
02：erase the ISC correction value.
⑱After ISC correction value erasure, it shows 0;
⑲Click【(87)Air-fuel control learning data erasure】；
⑳Click【Actuator Check】three times in 5 seconds to erase the air-fuel control learning data.
㉑After air-fuel control learning data erasure, it shows 0.
㉒Engine speed shows normal value. It has no fault after clearing all faults. With its instrument warning light off, the problem got resolved.
Summary
If Motorcycle has idle speed instability or a little bit high after uninstalling and installing, clearing, changing throttle, operate on erasure of ISC correction value and air-fuel control learning to solve the problems.