In July 2021, Toyota filed an improvement campaign with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer (control unit), covering the Prius. The filing affects 40,941 vehicles manufactured between June 17, 2020 and June 2021.
Overview
| MLIT filing number | 2106200 |
|---|---|
| Type | Improvement Campaign (manufacturer improvement measure / 改善対策) |
| Date filed | July 7, 2021 |
| Manufacturer(s) | Toyota |
| Component | Computer (control unit) |
| Production period | June 17, 2020 — June 2021 |
| Vehicles affected | 40,941 units |
Filing in context
The Computer (control unit) is the most frequently cited component category in this archive, appearing in 14 of its 4,890 filings. This filing is one of 39 Toyota notifications from 2021 in this archive. For scale, 846 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.
Issue
The pre-crash brake assist control program in the collision avoidance support system (Pre-Crash Safety System) is incorrect. When the system detects a vehicle ahead with collision potential, the warning alert and warning display activate normally; however, if the driver applies light brake pedal pressure, activation of the brake assist may be delayed.
Corrective action
On all vehicles, reprogram the pre-crash brake assist control program to the corrected specification.
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 |
|---|---|---|
| 6AA-ZVW51 | PRIUS | ZVW51-6151927 — ZVW51-6206556 |
| 6AA-ZVW55 | PRIUS | ZVW55-6014256 — ZVW55-6021556 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
衝突回避支援システム（プリクラッシュセーフティシステム）において、プリクラッシュブレーキアシスト制御プログラムが不適切なため、前方に衝突の可能性がある車両を検知した際、警報および警告表示は正常に作動するが、運転者のブレーキ踏力が弱いと、ブレーキアシスト作動が遅れる場合がある。
改善措置
全車両、プリクラッシュブレーキアシスト制御プログラムを対策仕様に修正する。
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=3008921
Related recalls
Same manufacturer, same component
Other Toyota filings involving the Computer (control unit), closest to this one by filing date.
Computer (control unit) — affects 196,984 vehicles.
Open recall detail →Computer (control unit) — affects 60,260 vehicles.
Open recall detail →Computer (control unit) — affects 115,206 vehicles.
Open recall detail →Computer (control unit) — affects 3,345 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Other — affects 111,842 vehicles.
Open recall detail →Computer — affects 111,842 vehicles.
Open recall detail →Exhaust Pipe — affects 111,842 vehicles.
Open recall detail →Seat Belt — affects 418,929 vehicles.
Open recall detail →Speedometer — affects 7,087 vehicles.
Open recall detail →