ECU RESET(MANUAL) HONDA RS125 FI

ECU/ECM-Engine/Electronic Control Unit/MODULE
DLC-Data Link Connection/Connector

Turn ignition switch off, remove seat, remove DLC (Data Link Connector) cover, short DLC terminals using the special tool (The pins to reset the ECU are attached to the Green and Blue wires on the harness. ) , open the throttle grip fully and hold, turn on ignition switch. The MIL light should come on and start blinking rapidly, with in 5 seconds after rapid blinking starts close the throttle grip and hold for more than 3 seconds.


Note this does not work if a code is stored on the ECM the code must first be read and removed. If the rapid flashing does not happen you should check for a code.

Note: Information below credited to Technomotive.

Myth

There is quite a bit of mythology revolving around resetting the ECU. Many people mistakenly believe that they need to reset the ECU after installing major engine modifications or parts such as exhaust pipe. Others believe resetting will resolve engine problems. Neither are correct. (Yes, resetting ECU may help in solving engine/electronic problems but the diagnosed errors has to be fixed first)

Reality

The ECU is always tracking the engine’s sensors and actuators when the ignition is switched ON. Resetting the ECU does not cause the ECU to learn engine changes any faster. The ECU is always  tracking the gradual changes in the engine sensors and actuators. The ECU never gets satisfied with a setting, and is always updating the trim values. It will discover whatever change you made to your engine and make the appropriate changes when you’re riding.

RS125