Wiring diagram by model this document describes car models to which the afc neo product code. Type iopg coil negative terminal to tach and l jet ecu pin 1 single female connector. I just installed my ls2,harness,ecu into nissan patrol. To3 power transistor is on503, 7637 is the date code. Vw ljetronic fuel injection workshop manual author. When installing the afc neo, both this document and the instruction manual are required. As i noticed, my uno have a problem with throttle position sensor, or. Ljetronic ecu connector pinout thanks for the picture, looks completely different with more modern ics. Gtv6 and milano, however if you own any car with bosch ljetronic injection the article will still help. Ljetronic electronic fuel injection only 530i 528i. The control model uses a 25pin plug, with pin 1 at the cable end. The distributor controls the ignition advance and retard. Jetronics primitive management system only controlled fuelling, so the ecu is little more than an injection control unit. The complete system contains the following components.
The most common cause of lhjetronic ecu failure for the 2nd lh 2. It uses the same ignition controller, but comes with a much more advanced oxygen sensor computer, and sometimes a knock sensor computer as well. Wire colors may vary wire colours and pin information are extracted from edition 07. The djetronic electronic control unit ecu rennlist.
Engine sensors provide the ke2 jetronic electronic control unit ecu with information relevant to coolant temperature, throttle position, manifold pressure, engine speed, and the rate of air sensor plate movement. 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. Ljetronic fuel injection systems for bmw e12s first fives. Looking on that ecu connector, pin 25 is on the right side where wiring harness exits ecu, pin 1.
Ecu pinout and electrical tests e30 rts your total bmw. Schematic diagram of an ljetronic system with lambda closedloop control. Remove the glove box and mount the ecu under the dashboard. Electronic control unit ecu on 190 series, the ecu is located on right side of engine on the firewall.
If the car already has electronical fuel injection, just replace the old ecu with the new from the e28 engine. The injection function of the motronic system is based on the well tried l jetronic system, although a number of refinements have improved operation. Tips from richard at elektronik repair the main cause of failure in the lhjetronic fuel injection ecu is the hybrid circuit. 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. 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. Bosch l jetronic l jetronic rx7 brought to you by the team at created date. 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. The wiring harness plug is removed from the ecu for many of. To access the connections, turn battery power off remove the plug from the fuel ecu, the ignition ecu plug can remain connected. Bosch le2lu2 jetronic circuit cr4 discussion thread. The engine control unit selects the operating mode depending on torque, power, exhaust gas and safety 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. Le1jetronic, le2jetronic, le3jetronic 19811991 this is a simplified and more modern variant of ljetronic. Bosch ke2 jetronic fuel ecu pinout measurements bentley turbo r early 89 the fuel ecu is the black box above the accelerator pedal.
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. Compared with ljetronic, the fuel injectors used by le. Important the information on this page is only applicable to the aby and adurs2 engine. Note that the ecu connector is accompanied by the c104, a small 3pin plug that provides data for the instruments. An electric wiring diagram is included at the end of the manual to assist you in tracing cables and locating. Bosch ljetronic fuel injection troubleshooting, maintenance. When the megasquirt is ready to power the pump, voltage is applied to pin 86b from ms pin 20 and ecu connector pin 37 should have power and through the coil a and out 85 should have ground to the ecu which is actually grounded inside. I added the pc board identification of the various modules that do the heavy lifting. 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. 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. Not much is standardized in djetronic connectors, but all of them have a 25 pin amp connector with a spacing of 5. The ljetronic system control unit ecu takes sensor information such as afm flow and temperature, engine rpm from ignition, warm up information from coolant temperature sensor, throttle mode idle and wot switches, o2 sensor in lambda systems. Ljetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant temperature sensor, fuel injectors, and the electronic control unit terminal for the constant idle systems cis if equipped.
In a motronic system the control of the ignition and fuelling is controlled by the ecu. For the operating method and precautions for the afc neo, refer to the instruction manual. Attached information is only meant to give you a compact and easily readable overview of each ecu pinout. The ke2 jetronic ecu processes incoming signals from the sensors in order to calculate the. The large flat distributor at the front of the engine just delivers the current to the plugs. Several of the ecu output actuators and solenoids are protected by fuses in the main fuse box. L jetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. The k in kjetronic indicates continuous injection, and lambda indicates the inclusion of a lambda probe, or oxygen sensor on certain models. Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. Ljetronic fuel injection technical troubleshooting article. I need the pinout for this ecu and eliminate unnecessary wires from the harness. Ljetronic system fuel injectors n open when energized by ecu not continuous as k jetronic. Vw ljetronic fuel injection workshop manual created date. The ecu was much cheaper to produce due to more modern components, and was more standardised than the ljetronic ecus.
Jetronickjetronic jetronic, or cise, which means continuous injection system, due to the mechanical fuel distributor, is the basic system used in lowerend models early on. Ecu will send a small current to the injector via the connector, opening the injector and allowing fuel from the fuel rail to spray through the tip and into the. A 25 pin connector and multiplug connects the ecu to the battery, sensors and actuators. Haynes diagram is good, but owners manual shows more. Now i have a little knowledge of mono jetronic fuel injection system. Type iopg coil negative terminal to tach and ljet ecu pin 1 single female connector. The ecu was at the heart of the fuel injection system volkswagen chose to reduce emissions and for better fuel economy. Bmw e12 l jetronic fuel injection systems schematic diagram. 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. As per ljetronic, a vanetype airflow sensor is used. Homogeneous lean charge mode in the transition zone between stratified charge mode and homogeneous charge mode, the engine runs in homogeneous lean charge mode.
On 300e models the ecu is located in the component compartment on the right side. Fuel injection system the ke2jetronic fuel injection system is fitted to turbocharged engines. Kejetronic kejetronic or cise, which means continuous injection system with electronic control is a variant on the much more basic jetronic system. Together with the ecu wiring diagram, basically what i used for reference when installing my. Direct petrol injection system with bosch motronic med 7. Ive wanted to get this up for a while, and finally found some time to sit down and do it. The diode blocks current from megasquirt on 86b from flowing to 86a and engaging the starter while the. 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. Vw type 2 ljetronic connector pinout benvinguts, passeu passeu. 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. If your car has a standard type of distributor then it is l jetronic. To understand the function of the hybrid, please envision it as a type of interface that converts the 5 volt signals of the microprocessor to 12 volts, or 12 volt signals of the controller to the level lower 5 volts. This is a fairly technical document that has more information than many readers are looking for.
1471 753 1292 281 1165 1437 1436 205 1472 740 637 359 1081 1449 579 1110 615 61 746 685 1496 136 663 1047 85 1611 381 451 530 1595 99 74 871 95 651 706 456 1395 99