In August 2024, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer (Engine), covering the Aero Star. The filing affects 1,720 vehicles manufactured between September 2019 and May 2024.
Overview
| MLIT filing number | 1155301 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | August 27, 2024 |
| Manufacturer(s) | Mitsubishi |
| Component | Computer (Engine) |
| Production period | September 2019 — May 2024 |
| Vehicles affected | 1,720 units |
Filing in context
The Computer (Engine) is the most frequently cited component category in this archive, appearing in 49 of its 4,890 filings. This filing is one of 41 Mitsubishi notifications from 2024 in this archive. For scale, 2,495 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 4 years and 8 months.
Defect
Due to insufficient consideration during design of the engine ECU on large-route buses, the following two defects may occur. (1) If the pinion gear and ring gear fail to mesh properly during starter operation, current continues to flow through the coil side to drive the motor without passing through the main switch contacts. This causes the coil to sustain heat damage. In the worst case, the starter becomes inoperable and the engine cannot be started. (2) The ECU may falsely detect DPF clogging or reduced oxidation catalyst efficiency. When this occurs, engine output is restricted, a DPF regeneration failure warning is displayed, and the engine warning lamp illuminates at the next engine start.
Corrective action
On all vehicles, reprogram the engine ECU software to the corrected/updated software.
Affected models & chassis ranges
This filing lists 10 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 |
|---|---|---|
| 2KG-MP35FK | ふそうエアロスター | MP35FK-70009 — MP35FK-80001 |
| 2KG-MP35FM | ふそうエアロスター | MP35FM-70032 — MP35FM-85028 |
| 2KG-MP35FP | ふそうエアロスター | MP35FP-70009 — MP35FP-85039 |
| 2KG-MP38FK | ふそうエアロスター | MP38FK-70032 — MP38FK-85428 |
| 2KG-MP38FM | ふそうエアロスター | MP38FM-70014 — MP38FM-80003 |
| 2PG-MP35FK | ふそうエアロスター | MP35FK-70001 — MP35FK-85003 |
| 2PG-MP35FM | ふそうエアロスター | MP35FM-70001 — MP35FM-95005 |
| 2PG-MP35FP | ふそうエアロスター | MP35FP-70001 — MP35FP-95001 |
| 2PG-MP38FK | ふそうエアロスター | MP38FK-70001 — MP38FK-95009 |
| 2PG-MP38FM | ふそうエアロスター | MP38FM-70001 — MP38FM-85062 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型路線バスのエンジンＥＣＵにおいて、設計検討が不十分なため、以下の不具合が生じるおそれがある。 （１） スターター作動時にピニオンギヤとリングギヤの噛合い不良が発生すると、メインスイッチの接点を介さずコイル側にモーターを駆動する電流が流れ続けてしまう。そのため、コイルが熱ダメージを受けて損傷すると、スターターが不動になり、エンジンを始動出来なくなる。 （２） ＤＰＦの詰まりや酸化触媒の効率低下を誤検知することがある。そのため、エンジン出力が制限されると共にＤＰＦ再生不可の警告が表示され、次回エンジン始動時にエンジン警告灯が点灯する。
改善措置
全車両、エンジンＥＣＵのソフトウェアを対策品に書き換える。
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=3009814
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Computer (Engine), closest to this one by filing date.
Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Computer (Engine) — affects 30,137 vehicles.
Open recall detail →Computer (Engine) — affects 2,146 vehicles.
Open recall detail →Computer (Engine) — affects 140,682 vehicles.
Open recall detail →Computer (Engine) — affects 23,179 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Rearview Mirror — affects 3,024 vehicles.
Open recall detail →Exhaust gas reduction device — affects 260 vehicles.
Open recall detail →Other — affects 26 vehicles.
Open recall detail →Wiring — affects 1,051 vehicles.
Open recall detail →Other (Control System) — affects 41,093 vehicles.
Open recall detail →All Mitsubishi recalls · All 2024 recalls · Recall Archive home