For Suzuki Firmware Versions 5.3e and greater: This procedure will allow the ECU to determine the optimum idle step value for your machine. By doing so, it will give better starts and low end throttle response if your machine's configuration deviates from the "typical" machine. To calibrate and use the optimum value: 1) Start with the key off. Put the toggle switch to position #1. 2) Connect the orange tether input to a 12V source. Turn on the key, and once the ECU detects it connected for one second, it will turn on the status light, and start pulsing out a L-L-L-L (L=1 second flash) error code to indicate its waiting to/calibrating the step value. You can now disconnect the orange wire. 3) Start the engine. 4) The ECU will idle the engine until it reaches operating temperature (still flashing the L-L-L-L code). Once the engine is warmed up, the ECU will idle the engine down, and save the optimum value. The engine will then return to normal idle, and the status light will flash on 1/4 second intervals to indicate it is done. 4) Next time the key is turned on, it will use this new value instead of the value stored in the “idle step” location of the map. To clear the optimum value, and default back to the map value (only required should you not find the optimum value good): 1) Start with the key off. Put the toggle switch to position #1. 2) Connect the orange tether input to a 12V source. Turn on the key, and once the ECU detects it connected for one second, it will turn on the status light, and start pulsing out a L-L-L-L (L=1 second flash) error code to indicate its waiting to/calibrating the step value. You can now disconnect the orange wire. 3) Turn off the key. 4) Next time the key is turned on, it will use the idle step value from the map.