Launching the self-diagnosis of the Ford Focus 1

To run self-diagnosis on the first generation Focus, you must:

1. Turn off the ignition
2. Press and hold the day mileage button.
3. Turn the ignition switch to position II by continuing to hold the button
4. Wait for the inscription "TEST" on the display of the odometer and release the reset button. Modes are switched with the same button. To exit the test mode, you must turn off the ignition.

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