In August 2017, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Engine Control Computer, covering the GA550, GAK550 and 1 more model. The filing affects 168 vehicles manufactured between October 14, 2015 and June 21, 2017.
Overview
| MLIT filing number | 1140950 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | August 10, 2017 |
| Manufacturer(s) | Mitsubishi |
| Component | Engine Control Computer |
| Production period | October 14, 2015 — June 21, 2017 |
| Vehicles affected | 168 units |
Filing in context
The Engine Control Computer is the most frequently cited component category in this archive, appearing in 18 of its 4,890 filings. This filing is one of 38 Mitsubishi notifications from 2017 in this archive. For scale, 3,652 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
On agricultural tractors, the engine control unit software is incorrect, causing elevated hydrocarbon (HC) concentrations in the exhaust gas. This exhaust gas circulates into the EGR cooler, generating carbon deposits that adhere to the EGR valve. Accumulation of these deposits degrades EGR valve movement, which may result in reduced engine output.
Corrective action
On all vehicles, reprogram the engine control unit with the corrected/updated software. Additionally, inspect the EGR valve and, if it does not operate normally, replace the EGR valve unit.
Affected models & chassis ranges
This filing lists 2 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 |
|---|---|---|
| YDN-GT55B | ＧＭ５５０ | T55B-50011 — T55B-50122 |
| YDN-GT55C | ＧＡ５５０ | T55C-50011 — T55C-50079; T55C-60011 — T55C-60032 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
農耕トラクタの原動機において、エンジン制御ユニットのプログラムが不適切なため、排気ガスに含まれるＨＣ（炭化水素）濃度が濃くなり、当該排気ガスがＥＧＲクーラーに回り込み、カーボンデポジットが生成されてＥＧＲバルブに付着することがある。このため、カーボンデポジットの堆積によりＥＧＲバルブの摺動が不良となり、エンジンの出力が制限されるおそれがある。
改善措置
全車両、エンジン制御ユニットのプログラムを対策プログラムに書き換える。 また、ＥＧＲバルブを点検し、正常に作動しない場合は、ＥＧＲバルブユニットを交換する。
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=3004082
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Engine Control Computer, closest to this one by filing date.
Engine Control Computer — affects 8,871 vehicles.
Open recall detail →Engine Control Computer — affects 88 vehicles.
Open recall detail →All Mitsubishi recalls · All 2017 recalls · Recall Archive home