In January 2015, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer (Emissions/Noise), covering the Aero Star. The filing affects 690 vehicles manufactured between May 29, 2013 and December 16, 1951.
Overview
| MLIT filing number | 1135140 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | January 29, 2015 |
| Manufacturer(s) | Mitsubishi |
| Component | Computer (Emissions/Noise) |
| Production period | May 29, 2013 — December 16, 1951 |
| Vehicles affected | 690 units |
Filing in context
The Computer (Emissions/Noise) is the most frequently cited component category in this archive, appearing in 9 of its 4,890 filings. This filing is one of 56 Mitsubishi notifications from 2015 in this archive. For scale, 2,999 of the 4,890 filings in this archive report a larger number of affected vehicles.
Defect
On large route buses, the control software in the engine control unit and the exhaust aftertreatment control unit is incorrectly programmed, causing the urea solution injection volume to be insufficient. As a result, nitrogen oxide (NOx) emissions in the exhaust gas may exceed the regulatory limit.
Corrective action
On all vehicles, reprogram the engine control unit and the exhaust aftertreatment control unit with the corrected/updated software.
Affected models & chassis ranges
This filing lists 9 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 |
|---|---|---|
| QDG-MP35FM | ふそうエアロスター | MP35FM-63502 — MP35FM-63519 |
| QDG-MP35FP | ふそうエアロスター | MP35FP-63001 — MP35FP-63533 |
| QKG-MP35FK | ふそうエアロスター | MP35FK-63001 — MP35FK-64011 |
| QKG-MP35FM | ふそうエアロスター | MP35FM-63001 — MP35FM-64039 |
| QKG-MP35FP | ふそうエアロスター | MP35FP-63003 — MP35FP-64044 |
| QKG-MP37FK | ふそうエアロスター | MP37FK-63001 — MP37FK-63549 |
| QKG-MP37FM | ふそうエアロスター | MP37FM-63001 — MP37FM-63518 |
| QKG-MP38FK | ふそうエアロスター | MP38FK-64012 — MP38FK-64123 |
| QKG-MP38FM | ふそうエアロスター | MP38FM-64011 — MP38FM-64044 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型路線バスの一酸化炭素等発散防止装置において、エンジン制御ユニットと排出ガス後処理装置制御ユニットの制御プログラムが不適切なため、尿素水の噴射量が少なく、排出ガス中の窒素酸化物（ＮＯｘ）の排出値が基準値を超えるおそれがある。
改善措置
全車両、エンジン制御ユニットと排出ガス後処理装置制御ユニットの制御プログラムを対策品に書換える。
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=3003469
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Computer (Emissions/Noise), closest to this one by filing date.
Computer (Emissions/Noise) — affects 35,822 vehicles.
Open recall detail →Computer (Emissions/Noise) — affects 76 vehicles.
Open recall detail →Computer (Emissions/Noise) — affects 31,122 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 →Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Exhaust gas reduction device — affects 260 vehicles.
Open recall detail →Other — affects 26 vehicles.
Open recall detail →All Mitsubishi recalls · All 2015 recalls · Recall Archive home