Mercedes older series diagnostic fault code reading. W1. 24 R1. 29 others. Mercedes older series diagnostic fault code reading. W1. R1. 29 1. 98. HTB1yH_UKVXXXXc6XFXXq6xXFXXX7/220273717/HTB1yH_UKVXXXXc6XFXXq6xXFXXX7.jpg' alt='How To Make Obd2 To Serial Cable' title='How To Make Obd2 To Serial Cable' />Freematics OBDII Adapter for Arduino. This product works as a vehicle OBDII data bridge for Arduino, providing OBDII data access with Arduino library as well as. What is a Diagnostic Trouble Code DTC Diagnostic trouble codes or fault codes are codes that are stored by the onboard computer diagnostic system. Things Needed There are basically 3 things you need to record diagnostic data from a GM based On Board Diagnostic 1 OBD1 system on your 1982 1995 era car. Mercedes scn coding online account is Mercedes benz online programming account. Mercedes benz scn coding online account One year can used for Wifi MB SD CONNECT C4. EHow Auto gets you on the fast track with repair, maintenance, and shopping advice. Whether youre jump starting a battery or insuring a new car, we can help. As you are reading this you will probably be wishing to extract a fault code or clear a fault indicator lamp from the dashboard of your older Mercedes Benz model vehicle. You will have also likely been frustrated by reading a multitude of confusing information, following dead web links and generally reading several different takes on the same subject mostly from well meaning members on forums or online motor clubs who unintentionally muddy obtaining the most correct and technically accurate information. Well the alternative information source you have been looking for is here, hopefully clear and accurate enough for your needs. I have collected the following information together in one place to save the frustration of trying to locate and find most that you would ever need to tackle this job. I will not repeat what has already been expertly written on this subject, you can find links below to these sources to expand on what I have noted here. What I have done is written about the important parts and included some vital pieces of information that you may need to refer to you may find this data at the other linked sources too, but at least it will remain available in another Mercedes resource should any of it disappear from the web, as a great deal on this subject already has. Enjoy Carsoft Interface connected to R1. MB Diagnostic History. Back in the day when Mercedes first ventured into the world of on board diagnostics in the era of the 1. W1. 24 and its stable mates they began to introduce electronic code diagnostics. The first being either through an 8 pin X9. X1. 14 square block fastened to the bulkhead. There were actually only. X1. 14 models as slot 2 was a small momentary push button and slot 4 was a small red LED used to read out fault codes flashes. All was needed was a paperclip or short banana plug jumper to ground the required pins and simply watch the number of flashes. Codes are resolved from comparison of flashes to fault codes on a written list. Counting flashes activated by grounding individual pins continued through the square block connectors to the 3. X1. 11. 4 diagnostic socket to about 1. This was commonly located within the ECU box and was accesses by removing a sealed access cap. Although 3. 8 pins were used only the pins relating to build options were loaded and as such gave diagnostic flash blink access to the cars individual modules. USA and some EU versions around 1. X1. 11. 4 and the now common 1. OBD port we use today. The reason behind this was that MB at the time had to comply with export requirements that necessitated access to emission data through OBD standard protocols. At this time Mercedes added the OBD port under the dash, in some cases near the steering column just to give access to emission related diagnostic codes, all the other electronic systems were dealt with through the 3. So very much a hybrid situation was in existence seemingly done as a quick fix to continue to sell cars in the US. Mercedes were in parallel developing their own digital diagnostic system and not following the industry standard of OBD12. From August 1. 99. Mercedes phased out the analogue type of flashblink diagnostics in favour of their propriety digital code reading system. Without going into too much detail this new system used ISO9. This used both a K line and L line connection and Mercedes own communications language to access the system. Even though the communications standard of ISO9. OBD2 systems the way in which it talked to the modules was bespoke and this is why you cannot use traditional OBD2 readers on systems of this type. Fortunately Mercedes saw the error of their ways and only ran with this for about a six year window opting to take on the OBD2 standard across the board from 1. Thank goodnessTypes. So given the above history there are three primary diagnostic code reading methods actually four that you may come across in the model year window of 1. Please note all dates stated are approximate and for guidance only What is a little confusing is that Mercedes in their wisdom used the 3. The diagnostic systems that were available during this period are. Flash Blink circa 1. Flash Blink with OBD X1. Under dash for US Markets circa 1. OBD Port for engine management onlyMercedes Proprietary Digital Diagnostics 1. OBD2 Standard 1. 99. Useful links that have great information and should be used for reference. MediaDiagnostics. Here is some important information that budding MB SL R1. W1. 24 diagnosticians will need. To build and use a simple Mercedes Flash Blink decoder,  here is the circuit diagram. Here is the link to the Cs. Baum Tools Manual code reader that contains most of the detailed information you may ever need regarding, connections, pin outs etc specifically for Mercedes Benz models. Importantly it contains the analogue flash blink error code fault decoder information. To read codes 1. Connect the code reader cables to pin 1 for the black or ground connection and pin 3 for the 1. Select your chosen test point module connection to test from the following 3. Turn ignition on, engine not running. Press momentary switch for 2 4 seconds, wait and then count flashes. Note down the number of flashes on a piece of paper. Repeat the process until the first flashed code repeats. Note A single flash means   no fault stored. To clear codes 1. After reading a code, press the momentary switch for 6 8 seconds then release. Mercedes SL R1. 29 3. Diagnostic connector pin out diagram and function list. Please note not all pins are loaded in every model, the quantity of available pins depends on model, version and fitted equipment. Later MB Proprietary Digital Diagnostic Communications 1. MY R1. 29  SLI have discovered that this period model The one I have was fitted with a combination of both analogue Blink Flash and Digital Mercedes Proprietary diagnostic systems. I do not have an OVP module voltage controller I have a Base Module. The base module can be accessed with the blinkflash code reader, faults read and cleared on pin 8, while other system components can be accessed with the Mercedes Proprietary reader from the same socket However that is about the extent of any function accessible by this method. As stated earlier above to read engine codes or ABS codes etc the unit has to be connected to a capable electronic code reader. The Autel OBD2 reader I use for most of my modern day Mercedes diagnostics does not work even with the OBD 1. This is because the protocol or access language is specific to Mercedes. About the only system capable of reading and accessing the majority of codes through the Mercedes proprietary system is the Carsoft V1. Markham Parks And Rec Programs there. This is a Mercedes single model diagnostic tool made in Belgium. Its kit consists of a 7. MB models Operating USB security dongle and Carsoft V1. PC software. I will cover the use of this diagnostic equipment in another post shortly. For those fortunate to own post 1. R1. 29 stable your car should be equipped with a fully compliant OBD2 diagnostic system, 1. OBD2 reader. Lucky youAir conditioning system self diagnosis R1. The AC control unit in the R1. Jenkins Perforce View Map From File. Mercedes SL model along with a few other MB models of the time outlined in the CS1. AC control unit console in the car. OBDResource Online Store Professional OBD2 Tools Center.