JECS Corporation (formerly Japan Electrical Control Systems Co Ltd) is an automotive components company headquartered in Isesaki,

Gunma is a landlocked prefecture of Japan located in the Kantō region of Honshu. Gunma Prefecture has a population of 1,937,626 (1 October 2019) and has a geographic area of . Gunma Prefecture borders Niigata Prefecture and Fukushima Prefecture to t ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

and a wholly owned subsidiary of

Hitachi () is a Japanese Multinational corporation, multinational Conglomerate (company), conglomerate founded in 1910 and headquartered in Chiyoda, Tokyo. The company is active in various industries, including digital systems, power and renewable ener ...

. Its principal products are electronic control units, software, semiconductors,

mechatronics Mechatronics engineering, also called mechatronics, is the synergistic integration of mechanical, electrical, and computer systems employing mechanical engineering, electrical engineering, electronic engineering and computer engineering, and also ...

, resin molding, inspection technology and material analysis. JECS was formed in June 1973. It was a

joint venture A joint venture (JV) is a business entity created by two or more parties, generally characterized by shared ownership, shared returns and risks, and shared governance. Companies typically pursue joint ventures for one of four reasons: to acce ...

between Robert Bosch GmbH,

Nissan is a Japanese multinational Automotive industry, automobile manufacturer headquartered in Yokohama, Kanagawa, Japan. The company sells its vehicles under the ''Nissan'' and ''Infiniti'' brands, and formerly the ''Datsun'' brand, with in-house ...

Motor Co. and Diesel Kiki Co., Ltd.. It enabled Nissan to use Bosch's engine control technology, and gave Bosch access to the Japanese market. JECS later expanded to manufacture many other automotive parts besides EFI systems.

History

*1956 Unisia established. *June 1973 JECS formed. *1993 JECS merges with Atsugi Unisia, becoming Unisia JECS Corp. *November 1999 The French clutch company

Valeo Valeo is a French global automotive supplier headquartered in France, listed on the Paris Stock Exchange ( CAC Next 20 Index). It supplies a wide range of products to automakers and the aftermarket. The Group employs 113,600 people in 29 countri ...

buys shares in Unisia JECS clutch division to gain entry to the Japanese market. This closely follows Renault's purchase of a controlling interest in Nissan, April of the same year. *Mid 2001 Unisia JECS forms joint venture with Bosch Braking Systems Co. to produce power steering systems. *October 2002 100% of Unisia JECS Corp. bought by

, delisted from stock market, renamed Hitachi Unisia Automotive, Ltd.. Previously, Nissan Motor, Hitachi and Robert Bosch owned 25%, 17% and 10% respectively. *2003 Unisia JECS opens factory in

Shenzhen Shenzhen is a prefecture-level city in the province of Guangdong, China. A Special economic zones of China, special economic zone, it is located on the east bank of the Pearl River (China), Pearl River estuary on the central coast of Guangdong ...

, China, to cut costs as demanded by Nissan. *2004 Hitachi Unisia Automotive Ltd. merged into Hitachi, Ltd. *2004 Unisia JECS opens factory in

Guangzhou Guangzhou, Chinese postal romanization, previously romanized as Canton or Kwangchow, is the Capital city, capital and largest city of Guangdong Provinces of China, province in South China, southern China. Located on the Pearl River about nor ...

, China, to make water pumps and valves.

Motorsport Sponsorship

Unisia JECS sponsored the Hasemi Motorsport team in JTCC and JGTC from 1991 until 2002. The Unisia JECS Skylines (GT500) and Silvias (GT300) also featured in video games & toys.

Applications

16-bit ECUs from JECS were produced for the 1993+

Nissan 300ZX The Nissan 300ZX is a sports car that was produced across two different generations. As with all other versions of the Z, the 300ZX was sold within the Japanese domestic market under the name Fairlady Z. It was sold in Japan from 1983 to 2000 a ...

Technology

Electronic Fuel Injection

Bosch first produced the Jetronic EFI system in 1967. K-Jetronic & L-Jetronic followed from around 1973 which is when Nissan became involved.

L-Jetronic

Early JECS systems were L-Jetronic, with Bosch moving vane airflow meters. These systems used a mixture of German & Japanese parts. The electronics were Japanese, the sensors often German, the fuel pumps/regulators made under license to Bosch by DENSO.

LH-Jetronic

By the mid-1980s, JECS were using LH-Jetronic, and the new Bosch hotwire mass airflow meter. The early JECS LH-Jetronic systems were based on a Motorola 6800 architecture, using many

components. The earliest hotwire meters were still from Germany, but by the end of the 1980s all of the system components (pumps, sensors, injectors, ECU) were being made in Japan.

References

{{Bosch Automotive companies established in 1973 Japanese companies established in 1973 Companies based in Gunma Prefecture Auto parts suppliers of Japan Nissan Former joint ventures Hitachi subsidiaries Bosch (company)