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Yup, it's a normal feature to force the engine to warm up faster. This is for emissions and fuel economy reasons as the faster the engine warms up, the shorter the time the engine needs to run on the richer cold start mixture. Toyota started doing this in the late 90s across many models and it was done somewhat inelegantly so it was obvious to the driver. Later models do the same thing but it seems more smoothly executed and is less obvious to the driver.
 
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