In January 2018, Honda filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer, covering the Clarity. The filing affects 205 vehicles manufactured between December 17, 2015 and August 2017.
Overview
| MLIT filing number | 1141840 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | January 25, 2018 |
| Manufacturer(s) | Honda |
| Component | Computer |
| Production period | December 17, 2015 — August 2017 |
| Vehicles affected | 205 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 21 Honda notifications from 2018 in this archive. For scale, 3,559 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 1 year and 8 months.
Defect
In the fuel cell control computer (FC-ECU), the fault detection program for the fuel cell stack is incorrect. When the high-voltage battery is fully charged, the program may misidentify a drop in fuel cell stack cell voltage as stack degradation. This causes warning lights and warning messages to illuminate and the fuel cell system to shut down. In the worst case, the vehicle may become inoperable.
Corrective action
On all vehicles, reprogram the fuel cell stack fault detection program with the corrected/updated 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-ZC4 | ＣＬＡＲＩＴＹ | ZC4-1000021 — ZC4-1000277 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
燃料電池制御コンピュータ（ＦＣ‐ＥＣＵ）において、燃料電池スタックの故障検知プログラムが不適切なため、高電圧バッテリが満充電時の燃料電池スタックのセル電圧低下を燃料電池スタック劣化と誤検知することがある。そのため、警告灯、警告表示が点灯し、燃料電池システムが停止して、最悪の場合、走行不能となるおそれがある。
改善措置
全車両、燃料電池スタックの故障検知プログラムを対策プログラムに書き換える。
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=3004178
Related recalls
Same manufacturer, same component
Other Honda filings involving the Computer, closest to this one by filing date.
Computer — affects 218 vehicles.
Open recall detail →Computer — affects 12,190 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Pressure Control Transmission Unit — affects 525,568 vehicles.
Open recall detail →Pressure Control / Transmission Unit — affects 578,956 vehicles.
Open recall detail →Other (Electrical System) — affects 218 vehicles.
Open recall detail →