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Automotive · Japan · 2024-08-27

Origin: 日本

Mitsubishi Fuso Aero Star large buses' engine ECU has insufficient design review

Country	Japan
Category	Automotive
Published	2024-08-27
Country of origin	日本
Manufacturer	Mitsubishi Fuso Truck and Bus Corporation
Models affected	Fuso Aero Star
Units affected	1720
Defect	In the engine ECU of large route buses, due to insufficient design review, the following defects may occur. ① If poor engagement between the pinion gear and ring gear occurs during starter operation, current continues to flow to the coil side, driving the motor without passing through the main switch contacts. As a result, if the coil is damaged by thermal stress, the starter becomes inoperable, preventing the engine from starting. ② Clogging of the DPF or a decrease in the efficiency of the oxidation catalyst may be incorrectly detected. As a result, engine output is restricted, a DPF regene…
Component	Engine (Engine ECU)
Remedy	For all vehicles, rewrite the engine ECU software with the improved version.
Recall number	5530
Official notice	View source ↗

What this means for sellers

Likely platform / channel actions	OEMs/dealers will run the remedy (repair, replace or refund); component suppliers in the chain may face traceback.
Self-check for comparable products	Check your comparable products' design, materials and QC records against the defect described here.
Rules & standards likely involved	the destination market's product-safety rules and mandatory standards

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