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Loss of control Published 15 Feb 2017 Ref JP-1139940

Toyota: Computer

Translated from Japanese · machine translation

Safety-critical recall — loss of control. If your vehicle is affected, contact your dealer before driving.
Country
Japan
Published
15 Feb 2017
Units affected
1455
Reference
JP-1139940

Affected vehicles

Toyota Mirai 2014–2016

Hazard

In the fuel cell system, due to improper boost control of the FC boost converter, the output voltage of the FC boost converter may exceed the maximum control voltage during extended downhill driving. As a result, a warning light illuminates, the fuel cell system shuts down, and the vehicle may become inoperable.
Show original (日本語)
燃料電池システムにおいて、FC昇圧コンバータの昇圧制御が不適切なため、長い下り坂を走行中にFC昇圧コンバータの出力電圧が最大制御電圧を超えることがある。そのため、警告灯が点灯するとともに燃料電池システムが停止し、走行不能となるおそれがある。

Remedy

All vehicles: Reprogram the control software.
Show original (日本語)
全車両、制御プログラムを修正する。

Official source

View the official recall notice