In February 2022, Hino, Isuzu & UD Trucks filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Other (control unit), covering the Quon. The filing affects 5,048 vehicles manufactured between March 2021 and December 2021.
Overview
| MLIT filing number | 1151022 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | February 17, 2022 |
| Manufacturer(s) | Hino, Isuzu, UD Trucks |
| Component | Other (control unit) |
| Production period | March 2021 — December 2021 |
| Vehicles affected | 5,048 units |
Filing in context
This notification is a joint filing by 3 manufacturers: Hino, Isuzu & UD Trucks.
The Other (control unit) is the most frequently cited component category in this archive, appearing in 2 of its 4,890 filings. This filing is one of 28 Hino notifications from 2022 in this archive. For scale, 1,945 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
On large trucks equipped with an electronically controlled compressed air dryer, the air dryer regeneration program in the central chassis input/output module is incorrect. As a result, the desiccant regeneration cycle does not execute at the required frequency, reducing the desiccant's moisture absorption capacity. High-humidity compressed air then condenses inside the tank and air system circuits, generating moisture accumulation. Continued operation under these conditions may cause vehicle height adjustment malfunctions. In the worst case, when ambient temperature falls below freezing, residual moisture in brake system air valves may freeze, triggering a brake warning message and causing the Electronic Braking System (EBS) to malfunction.
Corrective action
On all vehicles, reprogram the central chassis input/output module with the corrected updated software. If warning messages indicating a service brake abnormality or vehicle height adjustment system abnormality are displayed, perform fault diagnosis, replace the affected parts, and purge the air lines.
Affected models & chassis ranges
This filing lists 33 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 |
|---|---|---|
| 2DG-CF5AL | QUON | JNCMBN0B8MU060725 — JNCMBN0B9NU067703 |
| 2DG-CZ5BL | QUON | JNCMBP0E1MU060751 — JNCMBP0E4NU067498 |
| 2DG-HF5AL | － | JNCMBN0B3MU064651 — JNCMBN0B7MU064748 |
| 2DG-SF5AL | － | JNCMBN0B1MU063935 — JNCMBN0B8MU064922 |
| 2PG-CD4BA | QUON | JNCMBM0C2MU060867 — JNCMBM0C0NU067009 |
| 2PG-CD4CA | QUON | JNCMBM0C0MU060575 — JNCMBM0C8NU067226 |
| 2PG-CD5AL | QUON | JNCMBN0C9MU061648 — JNCMBN0C0NU066545 |
| 2PG-CD5BA | QUON | JNCMB02C8MU060605 — JNCMB02C6NU067716 |
| 2PG-CD5BL | QUON | JNCMB02C7MU061132 — JNCMB02CXNU067847 |
| 2PG-CD5CA | QUON | JNCMB02C5MU060531 — JNCMB02C2NU068054 |
| 2PG-CD5CE | QUON | JNCMB02CXMU060590 — JNCMB02C0NU067825 |
| 2PG-CD5CL | QUON | JNCMB02C4MU060648 — JNCMB02C1NU067896 |
| 2PG-CG4CA | QUON | JNCMBM0G7MU060530 — JNCMBM0GXNU067697 |
| 2PG-CG5BA | QUON | JNCMB02G5MU061813 — JNCMB02G2NU067490 |
| 2PG-CG5BE | QUON | JNCMB02G6MU065482 — JNCMB02G7NU066190 |
| 2PG-CG5BL | QUON | JNCMB02G6NU066777 |
| 2PG-CG5CA | QUON | JNCMB02G4MU060426 — JNCMB02G6NU068108 |
| 2PG-CG5CE | QUON | JNCMB02G4MU060572 — JNCMB02GXNU067866 |
| 2PG-CG5CL | QUON | JNCMB02G3MU060532 — JNCMB02G7NU067971 |
| 2PG-CV4BA | QUON | JNCMBM0CXMU060714 — JNCMBM0C3NU067263 |
| 2PG-CW4AL | QUON | JNCMBM0D0MU060620 — JNCMBM0D9NU067664 |
| 2PG-CW5AL | QUON | JNCMBN0D3MU060536 — JNCMB02D7NU068141 |
| 2PG-CW5BL | QUON | JNCMB02D4MU060612 — JNCMBP0D1NU067837 |
| 2PG-CW5CA | QUON | JNCMBP0D5MU060629 — JNCMBP0DXNU067576 |
| 2PG-CW5CL | QUON | JNCMBP0D3MU060600 — JNCMBP0D2NU067930 |
| 2PG-CX5BA | QUON | JNCMB02D8MU061083 — JNCMB02D8NU067564 |
| 2PG-CX5BL | QUON | JNCMB02D5MU060554 — JNCMBN0D3NU067729 |
| 2PG-GK5AAB | QUON | JNCMB22A6MU058782 — JNCMB22A3NU068137 |
| 2PG-GK5AAB改 | QUON | JNCMBP0A0NU065891 |
| 2PG-GK5AAD | QUON | JNCMBP0A3MU060540 — JNCMB22A7NU068142 |
| 2PG-GK5AAE | QUON | JNCMB22A9MU060560 — JNCMBP0A7NU067895 |
| 2PG-GK5AAE改 | QUON | JNCMBP0A0NU066006 |
| 2PG-GK5AAK | QUON | JNCMB02AXMU060989 — JNCMB02AXMU061608 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型トラックの電制エアドライヤーにおいて、セントラルシャシ入出力モジュールのエアドライヤー再生プログラムが不適切なため、当該ドライヤー乾燥再生動作が適切な頻度で実行されず乾燥剤の吸湿能力の低下により、高湿度圧縮空気がエアタンク及び各エアシステム回路内で結露し凝縮水が生成される。そのため、そのままの状態で使用を続けると、凝縮水の影響により車高調整不良等が発生することがある。最悪の場合、外気温が氷点下の環境において、（２） ブレーキ系のエアバルブ内に残留した水分が凍結し、ブレーキ異常の警告メッセージが表示されるとともに、電子制御ブレーキシステム（ＥＢＳ）が作動不良に至るおそれがある。
改善措置
全車両、セントラルシャシ入出力モジュールのプログラムを、対策プログラムに書き換える。なお、主ブレーキ異常および車高調整システム異常の警告メッセージが表示されている場合は、故障診断を行い該当する部品を交換し、エア配管内をエアパージする。
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=3005129
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