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Toyota to Recall all Mirai Fuel Cell Cars
Toyota Motor Corp. says it will call back all 2,800 of its fuel cell-powered Mirai sedans to fix a software flaw that can cause powertrain voltage to surge.
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Toyota Motor Corp. says it will call back all 2,800 of its fuel cell-powered Mirai sedans to fix a software flaw that can cause powertrain voltage to surge. Dealers will resolve the issue with a 30-minute software update.
The car’s boost converter may hike DC output voltage from the fuel stack to the car's drive motor beyond system limits, according to Toyota. It says the effect can be created if the driver applies full throttle after the vehicle has made a long descent while in cruise control mode.
Fuel cell have relatively low voltage output, respond slowly to changes in load demand and don’t tolerate overloads well. A boost converter helps overcome those limitations to make fuel cells viable for vehicular use, where power demand may vary quickly and significantly.
Toyota introduced the hydrogen-fueled Mirai in December 2014. The cars have been sold in Japan, the U.S. and certain markets in Europe and the Middle East.
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