MLIT Statutory Recall · Japan

Recall 1155543 — Computer (engine)

Filed October 31, 2024 · Mazda

Overview

MLIT filing number1155543
TypeStatutory Recall (government-mandated recall)
Date filedOctober 31, 2024
Manufacturer(s)Mazda
ComponentComputer (engine)
Production periodJuly 2022 — August 27, 2024
Vehicles affected12,965 units

Defect

In mild hybrid vehicles, the engine control computer and mild hybrid battery use improper battery control logic, which may cause voltage differences to develop between cells inside the battery. Continued use allows these voltage differences to grow, triggering a fault judgment at engine startup. This causes the engine warning light to illuminate and a "Hybrid System Malfunction" message to appear on the instrument cluster, and motor assist may stop. If a fault judgment occurs during a vehicle-speed idling stop, in the worst case the engine may fail to restart, resulting in a stall.

Corrective action

On all vehicles, reprogram the engine control computer and mild hybrid battery control module with the corrected/updated software.

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)ModelChassis ranges
3CA-KH3R3P CX-60 KH3R3P-100013 — KH3R3P-113761

Original Japanese (MLIT source text)

Show the original Japanese filing text

状況

③マイルドハイブリッド車のエンジン制御コンピュータとマイルドハイブリッド用バッテリにおいて、バッテリ制御が不適切なため、バッテリ内部のセルに電圧差が生じることがある。そのため、そのまま使用を続けると電圧差が大きくなり、エンジン始動時に故障判定してエンジン警告灯が点灯し、メータに「ハイブリッドシステム異常」のメッセージが表示され、モータアシストが停止するおそれがある。有車速アイドリングストップ時に故障判定すると、最悪の場合、エンジンが再始動できずエンストするおそれがある。

改善措置

③全車両、エンジン制御コンピュータとマイルドハイブリッド用バッテリの制御プログラムを対策プログラムに修正する。

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=3009876

Check your own vehicle: to see whether this filing affects a specific chassis number — and find every other recall for it — use the chassis lookup on the home page.

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