In February 2017, Toyota filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer, covering the Mirai. The filing affects 1,455 vehicles manufactured between November 11, 2014 and December 16, 2016.
Overview
| MLIT filing number | 1139940 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | February 15, 2017 |
| Manufacturer(s) | Toyota |
| Component | Computer |
| Production period | November 11, 2014 — December 16, 2016 |
| Vehicles affected | 1,455 units |
Filing in context
The Computer is the most frequently cited component category in this archive, appearing in 42 of its 4,890 filings. This filing is one of 24 Toyota notifications from 2017 in this archive. For scale, 2,590 of the 4,890 filings in this archive report a larger number of affected vehicles; the vehicles involved here were manufactured over a span of about 2 years and 1 month.
Defect
In the fuel cell system, the FC boost converter's voltage step-up control is incorrect. During extended downhill driving, the converter's output voltage may exceed the maximum control voltage. This causes the warning light to illuminate and the fuel cell system to shut down, rendering the vehicle inoperable.
Corrective action
On all vehicles, reprogram the control software.
Affected models & chassis ranges
This filing lists 1 type code(s). A vehicle is affected if its chassis number falls within one of the ranges below.
| Type code (型式) | Model | Chassis ranges |
|---|---|---|
| ZBA-JPD10 | Mirai | JPD10-0001001 — JPD10-0002476 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
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。
改善措置
全車両、制御プログラムを修正する。
Source & verification
This entry reproduces public data from Japan's MLIT recall registry. English text is jdmvin.com's own translation; always verify against the official source:
https://renrakuda.mlit.go.jp/renrakuda/ris-detail-car.html?class=recalldatacar&id=3003967
Related recalls
Same manufacturer, same component
Other Toyota filings involving the Computer, closest to this one by filing date.
Computer — affects 1,249,662 vehicles.
Open recall detail →Computer — affects 250,284 vehicles.
Open recall detail →Computer — affects 4,164 vehicles.
Open recall detail →Computer — affects 111,842 vehicles.
Open recall detail →Computer — affects 8,669 vehicles.
Open recall detail →