Set the meter to display the odometer first. Hold down the toggle switch and turn the key to ON, and keep switch depressed until the very end. You'll see the Maintenance light blink a couple times and the odomter will turn into a series of dashes. The dashes will then flash and disappear one by one. When all of the dashes have disappeared, you can let go of the toggle. Also, you do not need to start the engine for this procedure.