Ferrari 456M Seat Sliding Failure Due to Potentiometer Fault

Confirm a potentiometer failure by checking if the seat's 'easy entry' or memory functions are inconsistent or completely unresponsive. Since the ECU stops the motor if it cannot verify seat position, use a diagnostic tool to check for position sensor data or manually measure the resistance across the potentiometer pins while moving the seat backrest. If the resistance values remain static or show an open circuit during movement, the potentiometer is failing to report position to the ECU, causing the system to inhibit motor operation.

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