Shares in Toyota have jumped nearly 5% after a US inquiry¹ into reports of unintended acceleration² found no electronic flaws in the company's cars.

美国一家调查组发现丰田汽车意外加速问题不存在电气缺陷，丰田的股票随之上涨近5%。

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Toyota stayed ahead of General Motors as the world's biggest car maker last year
The 10-month investigation⁴ ordered by the US Congress followed recalls of millions of Toyota vehicles in 2009 and 2010.

Part of the investigation, published in August, suggested driver error might have played a part in many incidents.

Toyota, the world's biggest car maker, welcomed Tuesday's findings.

The company, which has reported a 39% drop in quarterly profits, lifted its operating profit forecast for the year to 550bn yen⁵ (£4.1bn; $6.7bn) from 380bn yen.

"Toyota still has a challenge competing against its rivals in emerging markets but there are hopes that it can regain⁶ its market share in the US market," Mitsushige Akino, a fund manager at Ichiyoshi Investment Management, told Reuters news agency.

'Peace of mind'

Toyota shares jumped 4.7% in early trading in Tokyo on Wednesday while they gained by more than 4% on Wall Street overnight.

"We believe that the results of the US Department of Transportation's investigation confirms the reliability⁷ of our electronic throttle⁸ control（节流控制） systems," Toyota said in a statement.

"We intend to continue to listen to our customers even closer and to offer not only safe vehicles but vehicles that provide peace of mind."

The company recalled more than 12m vehicles globally in 2009 and 2010 for various problems including faulty floor mats, sticky accelerator pedals, braking software glitches⁹（小故障） and steering¹⁰（操纵，指导） malfunctions¹¹.

Questions had been raised over whether software-driven throttles¹² had played a role in unintended acceleration complaints.

But US Transportation Secretary Ray LaHood said in a statement on Tuesday: "There is no electronic-based cause for unintended high-speed acceleration in Toyotas."

Mechanical flaws that were fixed¹³ in previous recalls appeared to be behind the problems with unintended acceleration, US officials said.

"We feel that Toyota vehicles are safe to drive," Mr LaHood stated.