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

Gunma is a 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 6,362 km2 (2,456 sq mi). Gunma Prefecture borders Niigata Prefecture and Fukushima P ...

, Japan and a wholly owned subsidiary of Hitachi. Its principal products are electronic control units, software, semiconductors, mechatronics, 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 economic risk, risks, and shared governance. Companies typically pursue joint ventures for one of four rea ...

between Robert Bosch GmbH, Nissan 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 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 Hitachi, 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 (; ; ; ), also historically known as Sham Chun, is a major sub-provincial city and one of the special economic zones of China. The city is located on the east bank of the Pearl River estuary on the central coast of southern province ...

, 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 (, ; ; or ; ), also known as Canton () and alternatively romanized as Kwongchow or Kwangchow, is the capital and largest city of Guangdong province in southern China. Located on the Pearl River about north-northwest of Hong Kon ...

, China, to make water pumps and valves.

Motorsport Sponsorship

Unisia JECS sponsored the Hasemi Motorsport team in JTCC and

JGTC Super GT (stylized as SUPER GT) is a grand touring car racing series that began in 1993. Launched as the , generally referred to as either the JGTC or the All Japan Grand Touring Car Championship, the series was renamed to Super GT in 2005. It is ...

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 Jetronic is a trade name of a manifold injection technology for automotive petrol engines, developed and marketed by Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers. There are several variations ...

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 A mass (air) flow sensor (MAF) is a sensor used to determine the mass flow rate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the co ...

. The early JECS LH-Jetronic systems were based on a

Motorola 6800 The 6800 ("''sixty-eight hundred''") is an 8-bit microprocessor designed and first manufactured by Motorola in 1974. The MC6800 microprocessor was part of the M6800 Microcomputer System (latter dubbed ''68xx'') that also included serial and para ...

architecture, using many Hitachi 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 Joint ventures Hitachi Robert Bosch GmbH