Onsomeljetronic systems, the air temperature sen sor is visible in the air flow meter inlet. A surprising number of different testers were developed for the d jetronic system. Bosch announced a more advanced system, l jetronic, in 1972 and the writer remembers a v12 jaguar saloon equipped with a dual version, one per bank, in 1974 or thereabouts, anticipating bmws similar dual motronic arrangement of their more recent v12 by many years. The bosch d jetronic is an analog electronic control unit ecu developed in the sixties, when microprocessors were not jet available for general use, but this is not to say that the complex calculations crunched digitally by screaming fast arithmetic logic units alu of todays injection ecus, were not perfectly capable of being processed by. Pelican parts has an excellent rental service with two of the most capable testers, the bosch and vw testers. Gtv6 and milano, however if you own any car with bosch ljetronic injection the article will still. Using the lambda sensor together with additional equipment for the lambda closedloop control facility, the k jetronic can already comply today with the exhaustgas regulations of tomorrow. The pressure gauge kdep 1034 is the same unit used to test bosch kjetronic cis systems and reads from 06 bar pressure.
Bosch licensed the concept to many automobile manufacturers. K jetronic system overview fuel supply 14 fuel metering 18 adapting to operating conditions 24 supplementary functions 30 exhaustgas treatment 32 electrical circuitry 36 workshop testing techniques 38 k jetronic since its introduction, the k jetronic gasolineinjection system has proved itself in millions of vehicles. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. Since remakes are not always economically feasible, airflow meters that are sent to us are assessed in the bosch plant and refurbished if necessary. Its wide use throughout the industry justifies its coverage in this manual. To use this gauge for testing vehicles with ljetronic, modify as shown below. Ive made a hobby of collecting these testers and learning about what they can do. But you can also use bosch 0 280 150 035 or any other green bosch d jetronic injector. Bosch k jetronic fuel injection manual linkedin slideshare. Then, the command unit processes this information received and calculate the appropriate fuel injection time, through an electric signal. Bosch kjetronic fuel injection part 2 volvo owners club.
Bosch l jetronic l jetronic rx7 brought to you by the team at created date. Please refer to the relevant service literature for uptodate inspection, adjustment and repair instructions. Assuring you of quality and reliability at a cost effective price. After a few days, you receive the repaired airflow sensor which is covered by the bosch exchange parts warranty. Unfollow k jetronic to stop getting updates on your ebay feed. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. The djetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to. The bosch djetronic electronic fuel injection system is composed of 3 major subsystems. Bosch technical instruction l jetronic pdf manufactured by the company bosch presented for you in electronic format page size 586 x 829 pts rotated 0 degrees. The pressure gauge kdep 1034 is the same unit used to test bosch k jetronic cis systems and reads from 06 bar pressure. The airflow sensor is therefore a functional component of the k jetronic. Nov 21, 2009 ning of the era of fuel injection at these were joined by bosch mono bosch, but there was still a long path jetronic in 1987. Bosch ke jetronic manual pdf for download contains important information, media and a detailed explanation about bosch ke jetronic manual pdf, its contents of the package, names of things and what they do, setup, and operation.
This is why engines equipped with the bosch motronic med 7 direct petrol injection system will be used for the first time in the lupo fsi and golf fsi. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Home video course bosch ke3 jetronic 539 89 injection system manual 328 mondial read online available as pdf. It was primarily based on patents that bosch licensed from the bendix corporation. Bosch fuel injection and engine management bentley. Vw l jetronic fuel injection workshop manual author. New important note this selfstudy programme explains the design and function of new developments. The following table is a guide to the fuel paths marked by each blue arrow in figure 6.
Bosch ljetronic fuel injection idle adjustment diagnostic. Bosch ljetronic fuel injection troubleshooting, maintenance. Anyhow here is the link bosch kjetronic fuel injection manual. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle writer remembers a v12 jaguar saloon equipped with a dual version, one per bank, in 1974 or thereabouts, anticipating bmws similar dual motronic arrangement of their more recent v12 by many years. Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx, all u. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. They have the potential to reduce fuel consumption by up to 15% compared to a similar engine with intake manifold injection. Other than that, it is functionally equivalent to a bosch efaw 228 tester. The bosch l jetronic fuel injection system used in the porsche 912e is often referred to as the air flow controlled or afc fuel injection system. The bosch d jetronic tester that can be rented from pelican parts tests some aspects of ecu operation, but it is not comprehensive. The bosch djetronic is an electronical gasoline injection system which was introduced in 1967. Bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page for usa models of alfa romeo spiders 19821989. The k jetronic is a mechanical system in which the fuel is continuously metered in accordance with the amount of air drawn in by the engine.
Originally, volkswagen adapted the l jetronic for the type 4 air cooled 411 engines sold in the united states due to more stringent emissions and fuel consumption regulations. The bosch djetronic tester that can be rented from pelican parts tests some aspects of ecu operation, but it is not comprehensive. Bosch jetronic repair manual free bosch jetronic repair manual repair manual bosch mono jetronic management bentley bosch k jetronic service manual pdf free download ebook handbook textbook user guide pdf files on the internet quickly and easily bosch k. With the help of the electronic control unit a more precisive fuel metering is possible compared to conventional carburetors so that the more stringent emission standards could be matched. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. Now let us have a look how bosch ke jetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. Then tested and calibrated to manufacturers original specification.
Bosch cis fuel injected engine cold and hot start problems duration. Bosch l jetronic fuel injection idle adjustment, diagnostic and tune up page for usa models of alfa romeo spiders 19821989. This particularly cost to travel on the way to fuel injection for efficient singlepoint injection unit passenger cars. There are several variations of the technology offering technological development and refinement. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. Mixture control unit the task of fuel management is to meter, or allocate, the correct quantity of fuel which corresponds to the amount of air drawn in by the engine. Repair kit to rebuild a bosch k jetronic fuel distributor metering, this kit will service all 8 cylinder aluminum units that do not have eha. Frank kerfoot, a former bell labs ee, did a fantastic job of reverseengineering the schematics of the ecu. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle bosch d jetronic is an analog electronic control unit ecu developed in the sixties, when microprocessors were not jet available for general use, but this is not to say that the complex calculations crunched digitally by screaming fast arithmetic logic units alu of todays injection ecus, were not perfectly capable of being processed by. Fuel metering distributor repair kit for bosch k jetronic 8. Order the complete gauge and directional control valve under the number kdep 1034. This kit will service the following fuel distributors.
Fuel management carried out by the mixture control unit. While new carburated engines were used in the european markets, vw adapted the ljetronic for the type 4 in the us due to more stringent emissions and fuel consumption regulations. The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967. To use this gauge for testing vehicles with l jetronic, modify as shown below. Order the complete gauge and directional control valve.
This manual can be viewed on any computer, as well as zoomed and printed, makes it easy to diagnose and repair problems with your machines electrical system. I am writing this article specifically from the point of view of a u. The djetronic system measures incoming airflow by monitoring. This is the only manual that fully explains aspects of the most widely installed bosch systems, including specific technical information on the newest kemotronic and lhmotronic systems that is not available from any other source. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. This tester is a relabeled bosch tester designed for the jaguar xjs, which used djetronic.
It differs from the bosch testers by having a separate plug that apparently connects to the fi amplifier, which was used to drive the additional injectors on the 12cyl jaguars. Vw l jetronic fuel injection workshop manual created date. Tthe photo obviously shows the system as fitted to a four cylinder cvh in an old escort but the principles of operation within this guide should be the same for its other applications wether capri 2. Kmi service exchanged kjetronic fuel distributors are carefully remanufactured by our technicians. Bosch l jetronic fuel injection troubleshooting, maintenance. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. Bosch ke3 jetronic 539 89 injection system manual 328 mondial to read online or download as pdf. Watch out for the rubber seals underneath the injectors and fuel hose leakage. The throttle switch is another original bosch part with no. This is the authoritative handbook on bosch fuel injection and engine management systems. Direct petrol injection system with bosch motronic med 7.