If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. Perfect power wiring diagram volvo ecu volvo wiring diagrams model sv40 2. Air mass meter amm with aluminum body and adjustable mixture. It was reading like someone would hold the info and pdf files hostage, freed for a fee, some around 6 gigs of volvo reference content including many years of green manual sets. Gasoline fuel injection system mono jetronic pdf995 bitbin. By club member john hall, who worked for volvo usa for many years. Attention aux poids du fichier merci a tout ceux qui mont. Ljetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. With the electronics disconnected, this system will operate as a k jetronic system. Megasquirt support forum msextra lhjetronic 35 pin. There seems to be a lot of dissagreement on what the version number is on this early system. B 230 f gasoline engine with fuel injection and cataly tic con erter system. You can both modify parameterscurvesmaps and read out all internal values. Check the system pressure and flow with the lb2912f.
This adapter allows you to calibrate the bosch lhjetronic. The most common cause of lh jetronic ecu failure is the hybrid control circuit. Onsomeljetronic systems, the air temperature sen sor is visible in the air flow meter inlet. Digital data processing and microprocessors make it possible to translate extensive operating. The primary difference between this motronic system and the previous generation of volvo lhjetronic engine management systems is the fact that ignition timing is controlled directly by the motronic pcm. With the electronics disconnected, this system will operate as a kjetronic system. This soft file bosch mono jetronic manual pdf epub is ready to read anytime you want. Start the engine and bring up to normal running temperature.
Since its introduction, the kjetronic gasolineinjection system has pro. Bad ecu common symptoms of a failing lh injection module. It looks like the ezk boxes uses a 25 pin connector,same row and pin spacing. Then, the command unit processes this information received and calculate the appropriate fuel injection time, through an electric signal. A site that lists the ecu connector pinouts for the lh jetronic 2. Product information automotive gasoline systems diagnostics and. L jetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. This manual describes the troubleshooting and repair of vehicles with the. Read above, i explained that lh jetronic has 2 seperate controllers and motronic controlls them togeather. Jetronic, lhjetronic, and motronic as an integrated engine management system. U tom slucaju na rezultat merenja ne utice gustina vazduha koja zavisi od temperature i pritiska atmosferskog.
With the lh relay jumpered between pins 30 and 87, there should be 12 v at lh connector pin 18. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. Bosch handbook k d l lh jetronic fuel injection emissions. Bosch djetronic, ljetronic, lhjetronic, lhmotronic, kjetronic and kejetronic fuel injection systems. This page was last edited on 30 novemberat sequential fuel injection and knock control.
I dont know why there are a separate ignition control box,and a ecu box. Monojetronic fuelinjection system system overview monojetronic is an electronically controlled, lowpressure, singlepoint injection spi system for 4cylinder engines. A computer controls the injection and ignition systems with reference to shared optimization criteria. This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the kejetronic. All data required to make the test system operate are stored on the software cassette. A thorough understanding of the various components is required before working on k jetronic fuel systems. Bosch l jetronic l jetronic rx7 brought to you by the team at created date. Vw l jetronic fuel injection workshop manual author. The most common cause of lhjetronic ecu failure is the hybrid control circuit. Earlier volvo engine management systems had separate control units for fuel and spark. Before troubleshooting, testing or adjusting the k jetronic fuel injection system, the ignition system and the mechanical system of the engine compression, valve timing, etc. This chart is a summary of bosch lhjetronic components for the saab 900 and 9000 cars, from 1984 through 1994. These early motronic systems integrated the spark timing element with thenexisting jetronic fuel injection technology. The lejetronic command unit receives various input signals, from the various sensors that send precise information about the instant engine operation conditions.
As stated in the video, you have access to all measures of the original software. How can i tell which version of bosch lh fuel injection is on. 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. Some later post1995 versions contain hardware support for first generation diagnostics according to iso 9141 a.
Bmw engines all about the m50m52m54bosch motronic basic, motronic 1. Mono jetronic fuelinjection system system overview mono jetronic is an electronically controlled, lowpressure, singlepoint injection spi system for 4cylinder engines. Model year 1989 and newer 928s have a spark monitoring system, consult the wiring schematics and workshop manuals for specifics. Before troubleshooting, testing or adjusting the kjetronic fuel injection system, the ignition system and the mechanical system of the engine compression, valve timing, etc. Bosch l jetronic fuel injection troubleshooting, maintenance. Ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3jetronic.
However the components of other cars using ljetronic will. Jun 08, 2012 this video shows how to engineer modelbased functions for the lh jetronic 2. As stated in the video, you have access to all measures of the. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. Get bosch mono jetronic manual pdf epub and save both time and money by visit our website, available in formats pdf, kindle, epub, itunes and mobi also. This is a simplified and more modern variant of ljetronic. Bosch digifant engine management system jetronic motronic. Vw l jetronic fuel injection workshop manual created date. Jun 22, 2011 this adapter allows you to calibrate the bosch lh jetronic. Licensing some of boschs ljetronic concepts and technologies, lucas, hitachi. There is alot of information on high performance lh jetronic systems but the problem with the system as far as i know is its inability to measure large amounts of airflow without moddifications since it uses a total flow sensor as far as. Jetronic controls fuel supply while the electronic ignition system provides optimal ignition control. Onsomel jetronic systems, the air temperature sen sor is visible in the air flow meter inlet.
This is a simplified and more modern variant of l jetronic. The final car to use k jetronic was the porsche turbo 3. A thorough understanding of the various components is required before working on kjetronic fuel systems. B 230 f gasoline engine with fuel injection and cataly tic. The le jetronic command unit receives various input signals, from the various sensors that send precise information about the instant engine operation conditions.
There are two separate temperature sensors housed in the one sensor body in lh fuel injected 928s, one sensor is for the lh and the other for the spark module. The charts are broken out by lh system version and catalyst or no catalyst. While port injection systems such as ke and l jetronic employ a separate injector for each cylinder, mono jetronic features a single, centrallylocated, solenoidcon. Lele2lu a 010902021 9705 1 operation lele2lu jetronic foreword the multitester pluspro software cassette is the component that gives the diagnostic equipment its unique test characteristics. I am currently developing a circuit board that accepts the 35pin connector used on jetronic boxes. This video shows how to engineer modelbased functions for the lhjetronic 2. Volvo repair manuals free download automotive handbook. The ongoing development of the control unit and the sensors has led from the d jetronic to the ljetronic, and resulted in this fuelinjection system becoming. The final car to use kjetronic was the porsche turbo 3. Motronic, featuring digital processing for numerous engine functions. Interject k jetronic servicing and cleaning procedure 1. This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the ke jetronic.
The volume of air taken in by the engine is measured to determine the amount of fuel to inject. The lhjetronic was mostly used by scandinavian car manufacturers, and by sports and luxury cars produced in small quantities, such as porsche originally, this system was called jetronic, but the name djetronic was later created as a retronym to distinguish it from newer versions. Home ferrari 400 ferrari 400 parts shop bosch k jetronic webshop. The engine control wire harness for both lhjetronic 3. Feb 12, 2019 bosch digifant engine management system jetronic motronic. Engine will not run at idle airfuel mixture is too rich this can damage catalytic converters no fuel pump operation, butthefuel pump operates when its relay is. Engine will not run at idle airfuel mixture is too rich this can damage catalytic converters no fuel pump operation, butthefuel pump operates when its relay is jumpered between pins 30 and 872. I have found that most of the problems were in connections, either being dirty or loose.
Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. The lh jetronic was mostly used by scandinavian car manufacturers, and by sports and luxury cars produced in small quantities, such as porsche originally, this system was called jetronic, but the name d jetronic was later created as a retronym to distinguish it from newer versions. Mar 27, 2006 read above, i explained that lh jetronic has 2 seperate controllers and motronic controlls them togeather. Aug 16, 2019 ke3 jetronic pdf mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic. I dont know why there are a separate ignition control box,and a. Robert bosch ljetronic efi system using mostly common workshop tools. While port injection systems such as ke and ljetronic employ a separate injector for each cylinder, monojetronic features a single, centrallylocated, solenoidcon. Note the orientation of the protruding alignment notch. The primary purpose of the fuelinjection system is to.
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