The self-diagnosis mode is available on all versions and versions of Fusion, regardless of the on-board computer.
Self-diagnosis requires that you perform the following steps:
Start the ignition, press and not release the diem reset button, turn the ignition switch at position II, while not releasing the daily mileage reset button, waiting for TEST on the odometer to release the label, then release the button. You can switch between self-diagnosis modes using the same button. To exit self-diagnosis mode, you must turn off the ignition or hold the button for more than 4 seconds.
