As i noticed, my uno have a problem with throttle position sensor, or you said potentiometer. Together with the ecu wiring diagram, basically what i used for reference when installing my. It is, therefore, possible this number may change during the life of the ecu. Not all stored faults may cause the fault warning lamp to illuminate. The following diagram provides an overview of how the fuel injection components are integrated. I attach a description of the bosch mono jetronic system.
Bosch ke2 jetronic fuel ecu pinout measurements bentley turbo r early 89 the fuel ecu is the black box above the accelerator pedal. Adaptronic is the leader in aftermarket ecus and accessories. Air pressure transducer apt the air pressure transducer monitors induction manifold pressura it passes this information to the relevant ecu. In vehicles with mt, pin 42 is directly connected to earth. As for ecu pinouts, the links below will provide all the info you need to debug any wiring issues with the 3b and aby engines. The wiring harness plug is removed from the ecu for many of. The djetronic electronic control unit ecu rennlist.
Unfortunately due to the file limits its one per post. Haynes diagram is good, but owners manual shows more. First tests with manual assembly at blaupunkt failed and bosch built up its. If you dont know which electronic control unit your car should have, just check the engine type and youll know which ignition system and ecu part number your car should have. Bosch kejetronic continuous injection system mechanical fuel injection overview part 1of 6 fuel injection system bosch cise 1986 fuel systems mercedesbenz cise electronic control system description the fuel injection system used on. Our world class customer service team can help you find the best ecu and. Tips from richard at elektronik repair the main cause of failure in the lh jetronic fuel injection ecu is the hybrid circuit. Other ecu failures may rarely occur but they are much more unusual than those listed above. The information is conveyed ro the ecu as a measure of engine load and is one of the elements used in the calculation of ignition timing and fuelling requirements. The ezk spark control is the system master, if engine rotation signals are not provided to the ezk, spark will not be generated and the ezk will not provide a turnon signal to the lh jetronic fuel injection system. If the ect is replaced by the prior owner, so the ect connector has fresh conductive contact with the factory wiring not being futzed with, like cut or what have you, suspect corrosion at the ignition ecu wire harness connector. Appendix b of djetronic article series by drdjet lists pinout of all ecus of all djetronic equipped cars. Kejetronic kejetronic or cise, which means continuous injection system with electronic control is a variant on the much more basic jetronic system.
This number is for the ecu as a whole and provides for the including of any later uploaded changes. Basic engine combustion process, combustion requirements, fuel delivery implementations, electronic fuel injection system components, ljetronic system, troubleshooting, conversion to lambda control, and performance. There are two water temperature sensors, one throttle position sensor, one exhaust sensor, and one air flow meter that all signal the ecu and must be operating correctly in order. Fuel system k jetronic lambdathis page is dedicated to checking and, if need be, adjusting your k jetronic lambda fuel injection system. In the table below you can find the ecu application chart. Bosch ke2 jetronic fuel ecu pinout measurements bentley turbo r early 89 22888 the fuel ecu is the black box above the accelerator pedal rhd cars. Direct petrol injection system with bosch motronic med 7 design and function selfstudy programme 253 service. Kjetronic 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 kjetronic since its introduction, the kjetronic gasolineinjection system has proved itself in millions of vehicles. L jetronic system, although a number of refinements have improved operation. If youve ever tried tracing the full schematic and concluded the headlights were controlled by the radio, these schematics will help a lot. The ecu can self detect up to 105 different problems with itself, its wiring and its associated sensors, storing the respective code if it detects any malfunction or reading outside of pre defined acceptable limits. Pdf page 18 of 20 both ect wires are red blue stripe from the ect connector that quickly hides under the sheathing. Mar 19, 2014 thought i would add a few of the most common ecu pinouts and wiring diagrams, as ive managed to get a pdf writer working as well as a copy of autodata.
Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. Ecu pinout and electrical tests e30 rts your total bmw. The control model uses a 25pin plug, with pin 1 at the cable end. In this unit the single pcb is surface mount on one side and leaded components on the other including two or. In which case this pin is pulled to 12v with the engine running and is used to empower the maf burnoff sequence with the engine off. Jetronics primitive management system only controlled fuelling, so the ecu is little more than an injection control unit. Chapter 3 of djetronic article series by drdjet describes the brain of djetronic. Schematic diagram of an ljetronic system with lambda closedloop control. If you would just like to understand a bit more about how the ecu works and some answers to the more common questions and problems, id suggest reading the first three sections, then moving on to. Important the information on this page is only applicable to the aby and adurs2 engine. Fuel injection system the ke2 jetronic fuel injection system is fitted to turbocharged engines.
Several of the ecu output actuators and solenoids are protected by fuses in the main fuse box. Bosch le2lu2 jetronic circuit cr4 discussion thread. The ecu internally connects that pin to earth via one of the ecu pins that are directly connected to earth. Thisis necessary due to the added complexity and increased power output of the engine, the system provides a higher degree of mixture strength control than that provided by the k jetronic system. I just cut open the wiring tube a little bit from the combo relay, cut the green wirepin 15 on the combo relay, stripped the green wire on the fuse box connectorpin 4 a bit and soldered the wires together. Ecu pinout and electrical tests at the connector on april 24, 20 at 7. Diagram pdf somurich pdf toyota 1nz fe ecu engine wiring diagram temdesong porsche 928 ecu dme bosch lh jetronic 0280002504 0 280 002 504 specialized ecu repair 1nz fe ecu wiring diagram pdf somurich ecu dashboard immobox pin outs diagrams com may th, 2019 vag edc16 ecu pinout basic connection pinout for bosch edc16u1 edc16cp34. Anyone who can speak polish, translate and publish. Bmw e12 l jetronic fuel injection systems schematic. The injection function of the motronic system is based on the well tried l jetronic system, although a number of refinements have improved operation. Do you have the pin function image for a bosch jetronic ecu 0280000. Wire colors may vary wire colours and pin information are extracted from edition 07. By controlling both major systems in a single unit, many aspects of the engines characteristics such as power, fuel economy, drivability, and emissions can be improved.
Ignition voltage on the e28 is supplied to the combo relay by the green wire on the small connector next to the ecu. Appendix b of d jetronic article series by drdjet lists pinout of all ecus of all d jetronic equipped cars. Tips from richard at elektronik repair the main cause of failure in the lhjetronic fuel injection ecu is the hybrid circuit. Chapter 3 of djetronic article series by drdjet describes the brain of. Jetronic s primitive management system only controlled fuelling, so the ecu is little more than an injection control unit. Switched 12v supply voltage via fuel pump relay activated by ecu. In many settings and measured values are described. I am posting these here for posterity, as went down some time ago, and i dont know if will continue hosting it forever. Le1jetronic, le2jetronic, le3jetronic 19811991 this is a simplified and more modern variant of ljetronic. This valve is mounted on the throttle body part like a carburetor. Bosch ke2 jetronic fuel ecu pinout measurements bentley. Ljetronic fuel injection systems for bmw e12s first fives. I was disappointed but not really surprised to find that there isnt much information available about the inner workings of the bosch l jetronic ecu used in so many cars worldwide.
Chapter 3 of djetronic article series by drdjet describes function, repair and tuning of the brain of djetronic. The earth return connection for most engine sensors is made through an ecu pin that is not directly connected to earth. To access the connections, turn battery power off remove the plug from the fuel ecu, the ignition ecu plug can remain connected. Ljetronic fuel injection technical troubleshooting article.
Dec 12, 2011 wise people, i have scoured the internet and a few libraries for a circuit diagram of a bosch le2 or lu2 jetronic ecu circuit diagram without success. The following article discuss on ljetronic fuel injection systems for bmw e12 which covers following topics. This is a fairly technical document that has more information than many readers are looking for. Ke jetronic ke jetronic or cise, which means continuous injection system with electronic control is a variant on the much more basic jetronic system. The main feature of mono motronic system is the existence of a single valve for all engine cylinders. The bosch ljetronic fuel injection system used in the porsche 912e is often referred to as the. Please note that the output waveforms produced by the rather sophisticated compared to the tr8 ecu output current control circuity are not shown in the diagram. The diagram below shows a typical fuel system arrangement, the. The diagram at left click on it for a larger version is from a bosch pamphlet that explains the overall operation of the ecu. Oct 27, 2012 9 responses to ecu pinout and electrical tests e30. This code is used to indicate any late modifications which may have. It has been discussed, that they are interchangeable, but for anyone searching what they might need or have, we all know that year of the bus means little compared to whats actually presently in there.
They are generally only available in the domain of dealerships and a small number of audi specialists as addendums to the generic audi 8090 wiring info. Bosch licensed the concept to many automobile manufacturers. Also related to holdover relay with ecu for the maf. Note that the ecu connector is accompanied by the c104, a small 3pin plug that provides data for the instruments. The diode blocks current from megasquirt on 86b from flowing to 86a and engaging the starter while the car is running starting or running.
A 55 pin connector and multiplug connects the ecu to the battery, sensors and actuators. By no means it shall replace bosch service manuals for your car that are more detailed describing cold start valve control, correct pressures, locations with photos and spare numbers. Wise people, i have scoured the internet and a few libraries for a circuit diagram of a bosch le2 or lu2 jetronic ecu circuit diagram without success. Bosch ljetronic l jetronic rx7 brought to you by the team at. So lets start with the 306 s16, bosch motronic mp3. 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. Direct petrol injection system with bosch motronic med 7. As per ljetronic, a vanetype airflow sensor is used. There have been several books published that cover repair and upgrading the rest of the system, but they do not discuss the circuitry inside the ecu itself. Gtv6 and milano, however if you own any car with bosch ljetronic injection the article will still help.
The bosch l jetronic system has a variety of sensors designed to signal the ecu electronic control unit throughout engine operation. In this unit the single pcb is surface mount on one side and leaded components on the other including two or three proprietry thick film hybrid modules. There are several variations of the technology offering technological development and refinement. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed and marketed by robert bosch gmbh from the 1960s onwards. The bosch djetronic electronic fuel injection system is composed of 3 major subsystems. Probably for burnoff assuming that pin 25 burnoff trigger is a 0v output pulse. Were dedicated to providing you with the most robust and advanced ecu for your mazda, toyota, nissan, and custom projects.
Other ecu earths are use to complete actuator and sensor circuits. Attached information is only meant to give you a compact and easily readable overview of each ecu pinout. It was reading like someone would hold the info and pdf files hostage, freed for a fee, some around 6. Jetronick jetronic jetronic, or cise, which means continuous injection system, due to the mechanical fuel distributor, is the basic system used in lowerend models early on. I added the pc board identification of the various modules that do the heavy lifting. An electric wiring diagram is included at the end of the manual to assist you in tracing.
The ecu was much cheaper to produce due to more modern components, and was more standardised than the ljetronic ecus. Do not try to correct engine trouble by making simple adjustments to the idle speed or the idle mixture co. I would add to each of the years the associated ecu part number. It uses the same ignition controller, but comes with a much more advanced oxygen sensor computer, and sometimes a knock sensor computer as well. Ecu internally connects that pin to earth via one of the ecu pins that are directly connected to earth. L jetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. The djetronic electronic control unit ecu controls most aspects of the fuel injection system. Thought i would add a few of the most common ecu pinouts and wiring diagrams, as ive managed to get a pdf writer working as well as a copy of autodata. Fuel system kjetronic lambdathis page is dedicated to checking and, if need be, adjusting your kjetroniclambda fuel injection system.
Now i have a little knowledge of mono jetronic fuel injection system. It is no secret that the wiring schematics for the audi s2 are notoriously hard to get your hands on. The motronic ignition point and injection duration are jointly processed by the ecu so that the best moment for ignition and fuelling are determined for every operating condition. I also got information that resetting ecu could be done for having best performance. The k in kjetronic indicates continuous injection, and lambda indicates the inclusion of a lambda probe, or oxygen sensor on certain models. The throttle body integrates other components that in the motronic system are scattered around the engine, like idling actuator and butterfly potentiometer, among other. Looking on that ecu connector, pin 25 is on the right side where wiring. You then click on clear faults to clear the fault code. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. As i noticed, my uno have a problem with throttle position sensor, or. Also known as a brain or a computer, its a combination of digital circuits, analog sensor interfaces, and control circuits.
Bosch ke jetronic continuous injection system mechanical fuel injection overview part 1of 6 fuel injection system bosch cise 1986 fuel systems mercedesbenz cise electronic control system description the fuel injection system used on all mercedesbenz gasoline engine vehicles uses. All sensors are used here to calculate when and how long to open the fuel injectors. Ljetronic fuel injection systems for bmw e12s peter florance. Thisis necessary due to the added complexity and increased power output of the engine, the system provides a higher degree of mixture strength control than that provided by the kjetronic system. Opening times determine the amount of fuel injected. Motronic is the trade name given to a range of digital engine control units developed by robert bosch gmbh commonly known as bosch which combined control of fuel injection and ignition in a single unit.
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