The Lexus RX330 Ignition Switch is the gateway that energizes the SUV's electrical and starting systems, allowing the driver to make the engine come to life or power components with a simple turn of the key or press of the switch. Early models of the RX330 maintained a traditional steering column Ignition Switch with a lock cylinder that accepted a coded key and routed battery power to START, ON, ACC, or LOCK positions while also locking the wheel to deter theft. When the proper key is inserted in the Ignition Switch to the START position, current flows to the starter, fuel injection, and ignition circuits, and once in ON, the Lexus electronics and comfort functions remain powered. If set to ACC, drivers in a Lexus can enjoy the radio or windows without having to start up the engine; moving back to OFF or LOCK removes power and allows the key to be removed. Wear to keys, wafer tumblers, or internal contacts may jam the Ignition Switch, resulting in hard turns, no-crank conditions, flickering components, or even unexpected engine shutoff, problems which became one of the known issues as the RX330 aged. Later versions of the Lexus use a push button start that holds the coded fob in a pocket, where the computer checks the signal and, with the brake held down, activates the starter, providing newer RX330 owners with quicker starts and fewer moving parts than the mechanical Ignition Switch.
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