Overview
| MLIT filing number | 1133020 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | February 12, 2014 |
| Manufacturer(s) | Toyota |
| Component | Hybrid Control Unit (Inverter) |
| Production period | March 23, 2009 — February 2014 |
| Vehicles affected | 986,232 units |
Defect
In the hybrid system, a software defect causes unexpected thermal stress to be applied to components in the voltage boost circuit during high-load driving such as acceleration. Over time, this stress damages the affected component, illuminating the warning light and causing the system to revert to fail-safe motor-only drive. If electrical noise is generated at the moment of component failure, the hybrid system shuts down entirely and the vehicle becomes inoperable.
Corrective action
Reprogram the control software to the corrected specification on all vehicles. If the warning light illuminates due to component damage after the software update, replace the power converter (DC-AC inverter) module at no charge.
Affected models & chassis ranges
This filing lists 1 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 |
|---|---|---|
| DAA-ZVW30 | PRIUS | ZVW30-1000000 — ZVW30-1795341; ZVW30-5000004 — ZVW30-5740951; ZVW30-0052877 — ZVW30-0333134 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
ハイブリッドシステムにおいて、制御ソフトが不適切なため、加速時などの高負荷走行時に、昇圧回路の素子に想定外の熱応力が加わることがある。そのため、使用過程で当該素子が損傷し、警告灯が点灯して、フェールセーフのモータ走行となる。また、素子損傷時に電気ノイズが発生した場合、ハイブリッドシステムが停止し、走行不能となるおそれがある。
改善措置
全車両、制御ソフトを対策仕様に修正する。 制御ソフト修正後に素子が損傷して警告灯が点灯した場合は、電力変換器（ＤＣ－ＡＣインバータ）のモジュールを無償交換する。
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=3003203