Each function can be displayed in turn by pressing the button on the vehicle's right combination lever. If the battery is disconnected, the on-board computer does not work because it loses all collected data. After connecting, the indication lights up, and the starting knob located on the speedometer must be set in a clockwise direction at the mark «0». Further installation instructions can be found in the extensive user manual.
Note. Recommendation: Troubleshooting on the on-board computer is so extensive and costly that it is best to contact a suitably trained body shop before you damage the electronic components with unskilled intervention.