In May 2018, Toyota filed an improvement campaign with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer (Steering). The filing affects 561 vehicles manufactured between January 10, 2017 and October 17, 2017.
Overview
| MLIT filing number | 2105410 |
|---|---|
| Type | Improvement Campaign (manufacturer improvement measure / 改善対策) |
| Date filed | May 9, 2018 |
| Manufacturer(s) | Toyota |
| Component | Computer (Steering) |
| Production period | January 10, 2017 — October 17, 2017 |
| Vehicles affected | 561 units |
Filing in context
The Computer (Steering) is the most frequently cited component category in this archive, appearing in 10 of its 4,890 filings. This filing is one of 30 Toyota notifications from 2018 in this archive. For scale, 3,103 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.
Issue
An error in the hydraulic pump motor rotation control program within the forklift's hydraulic control unit for cargo handling and steering causes a specific sequence of conditions—fine operation of the cargo lever while the pump motor is within a specific speed range at maximum hydraulic pressure, followed by rapid return of the lever to neutral—to momentarily reduce hydraulic pressure below the level required for power-assisted steering. If a steering input is made during this interval, steering effort may temporarily increase.
Corrective action
On all vehicles, reprogram the controller with the corrected/updated software.
Affected models & chassis ranges
This filing lists 5 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 |
|---|---|---|
| ZAF-408FB25 | トヨタジェネオ－Ｂ | 408FB25-10046 |
| ZAF-8FB18 | トヨタジェネオ－Ｂ | 8FB18-10390 — 8FB18-13381 |
| ZAF-8FB25 | トヨタジェネオ－Ｂ | 8FB25-10068 — 8FB25-12836 |
| ZAF-8FBL18 | トヨタジェネオ－Ｂ | 8FBL18-10014 — 8FBL18-11082 |
| ZAF-8FBL25 | トヨタジェネオ－Ｂ | 8FBL25-10013 — 8FBL25-10441 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
フォークリフトの荷役及び操舵の油圧制御コントローラにおいて、油圧ポンプモータの回転制御プログラムが不適切なため、荷役レバーを微操作し、油圧ポンプモータが特定の回転数の範囲にあり、かつ、油圧が最大の状態から、すばやく荷役レバーを中立位置へ戻した直後に、一時的に操舵のパワーアシストに必要な油圧が不足することがある。そのため、この間にステアリング操作を行うと、一時的に操舵力が重くなるおそれがある。
改善措置
全車両、コントローラの制御プログラム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=3008862
Related recalls
Same manufacturer, same component
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