In July 2023, Honda filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Engine Control Computer (ECU), covering the ZR-V, Civic. The filing affects 5,942 vehicles manufactured between June 2022 and March 2023.
Overview
| MLIT filing number | 1153600 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | July 27, 2023 |
| Manufacturer(s) | Honda |
| Component | Engine Control Computer (ECU) |
| Production period | June 2022 — March 2023 |
| Vehicles affected | 5,942 units |
Filing in context
The Engine Control Computer (ECU) is the most frequently cited component category in this archive, appearing in 5 of its 4,890 filings. This filing is one of 18 Honda notifications from 2023 in this archive. For scale, 1,879 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 9 months.
Defect
The engine control unit (ECU) contains an improperly designed control program that misidentifies a momentary crankshaft reversal—which occurs normally during EV operation or regenerative braking while engine stop-position control is active—as a fault. The ECU then resets and erases stored diagnostic trouble information. As a result, the vehicle does not conform to the on-board diagnostic system technical standards prescribed in Article 31 of the Safety Standards (Appended Table 48 of the Detailed Regulations).
Corrective action
On all vehicles, reprogram the engine control unit (ECU) with the corrected/updated software.
Affected models & chassis ranges
This filing lists 3 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 |
|---|---|---|
| 6AA-FL4 | CIVIC | FL4-1000035 — FL4-1003857 |
| 6AA-RZ4 | ＺＲ－Ｖ | RZ4-1000039 — RZ4-1001851 |
| 6AA-RZ6 | ＺＲ－Ｖ | RZ6-1000038 — RZ6-1000401 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
エンジン制御コンピュータ（ＥＣＵ）において、制御プログラムが不適切なため、ＥＶ走行時または回生時のエンジン停止位置制御中にクランクシャフトの瞬間的な逆転を異常と誤検知し、ＥＣＵがリセットして、故障診断情報を消去することがある。そのため、保安基準第３１条で定める基準（細目告示別添４８「車載式故障診断装置の技術基準」）に適合しない。
改善措置
全車両、エンジン制御コンピュータ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=3009412
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Same manufacturer, same component
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Engine Control Computer (ECU) — affects 175,356 vehicles.
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