For model year 1996, Land Rover chose to discontinue use of the 14CUX in its products and instead used GEMS ("Generic Engine Management System"), which had been developed jointly by Lucas and SAGEM.
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The engine control unit (ECU) of the 14CUX system is run by a Motorola MC6803U4 8-bit microprocessor, which is an uncommon variant of the otherwise ubiquitous 6803.
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The 14CUX is capable of storing diagnostic trouble codes in a 32-byte segment of its internal memory that is maintained (even while vehicle ignition is off) by applying 5VDC (regulated down from 12VDC from the vehicle's battery.) Because of this maintainer voltage, the ECU is always drawing a small amount of current.
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