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 |
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