Author Topic: C20NE ecu fault codes and live reading with ELM 327 or similar bluetooth dongles  (Read 406 times)

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Offline CroCop

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So I'll try tto keep this short. I have c20ne calibra, which i wanted to  modernise a little bit. Not a long time ago I've seen one guy using this dongle on his car and made me interested could i use it on my calibra mostly for fault code clearing and sometimes to track data when changing or tweeking some mechanical parts. The other friend of mine has opel vectra a with the same ecu as mine and he cant get this dongle to work when he connetcts it with 10pin aldl to obd 2 adapter.
 
now, has anyone tried to do the same on c20ne calibra with mapped and chipped ecu or the stock one and managed to pull it of, if so how. I know that its mostly done with op-com and computer but i want my data on my phone in any time.

Offline calibul

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I understand you very well what you want, but the only working solution for you is Op-com with laptop! Sorry!

Offline electric geen

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The Calibra is not OBD compliant in either I version or II, so none of those dongles will work as the Calibra ECU (Bosch) is not compliant in any way. The paper clip test is the fail safe method, but persistent problems will light the ECU warning lamp. I believe the software used in the Calibra will dates back to the L - Jetronic days of Porsche as the systems are similar especially my 8V with a flapper air measuring device.

Offline calibul

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Just saying... I'm reading the error codes and a live-data with Op-com on my Bosh Motronic without any problem!

Offline electric geen

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Agreed that op com seem to have software that reads the ECU and in real time (as does the trip computer in the Calibra (certain data only)) but this is specialist software not OBDI or II so none of the OBD loggers will work. Having gogled op com and gone to a link, their attitude is a bit desperate and arrogant. I have too much other stuff to do but whipping up an interface and software for a 8 bit (or 16 bit) processor of an ECU is not that difficult for me or for others but the number of times I would use it in a year , probably zero hence the paper clip low tech approach. The Bosch ECU in the Calibra is not programmable without changing memory components and to be honest why bother when Megasquirt is out there to fine tune any engine and someone else has spent many many hours debugging the software. Op com seem to complain a lot about their software being hacked by the Chinese, but unless Op com have a licence from GM or Bosch (unlikely) how did they find out the protocols to communicate with the ECU? Pot calling kettle black somewhere in there.

Offline electric geen

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Two online articles that explain the Motronic 1.x ECU as fitted to my 8 Valve Calibra 2.0NE, one from a (cough) BMW site and the other a final project which the guy built to test all GM OBD1 K Line ECU's. Any electronic´s hobbyist has enough info there to construct and interrogate any of the Calibra Motronic ECU's. This includes real time monitoring of all the sensor inputs/outputs on LCD, no PC or Laptop required and it can be vehicle mounted.

One point I did pick up from a quick surf of the material is the frequency of the baud rate (communication) is very particular to these ECU´s and would explain why some of the op com clones and scantool clones won´t work very well, other than that it´s all bog standard interface and software procedures - but it's all done for you already.


https://lukeskaff.com/projects/car/gm-obd-i-obd1-aldl-microcontroller-lcd-interface-scan-tool/
https://forum.bmwland.ru/index.php?act=attach&type=post&id=6521

Also a link to a Raspberry PI version in the comments section of Luke Skaff's Website

Offline calibul

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Guys... Why you don't understand that it's so easy (and cheap). When I need, just for a seconds I connect the Op-com (China clone) and by my laptop I can see any error and I can check the works of each one of the sensors in the car like the Oxygen Sensor, Knock Sensor, Idle, MAF, ABS etc. ...  It's faster then a "paper clip" and there's no comparison.
It's enough for our "simple" cars! Just to keep them in the perfect condition! 8)

P.S. Thanks for the links!  :)

Offline Jepwee

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Hi, It's with great interest in reading the facts regarding ECU fault codes and live data. I have for awhile been trying to understand where early GM vehicles fit in with Fault code readers. I understand OBD1 and OBD2 will work on vehicles from 1996, but prior to that you had to go to the Dealers for the ECU to be interrogated. As a Techno Pygmy I do not understand what is OP COM is, how its connected to your computer and to be honest fiddling about with my lap top fills me with dread. Basically all I am asking is can I buy a code reader that will give me fault codes and live data. I am sure there must be something around as not only GM was using the Bosch Motronic system and something would have filtered down to the general public. I take my hat off to you guys who understand computers and make it sound simple, but people like me who worked on PA Cresta's,Velox's and Wyverns we need a bit help. The car by the way is a 8v C20NE, had it for 18 years.           

Offline Jepwee

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Hi, Is there anyone who could answer my question on code readers?.