CAN Error Testing And Repair

A Quick Look At CAN Network Testing



A vehicle arrived at our workshop today on the back of the wrecker. The fault reported was non-start and also the instrument cluster was showing a warning that the vehicle was not recognising that the gearbox was in neutral.

Although the tests and fault finding steps in this post are the same for most vehicle CAN networks, the vehicle we were presented with was an 2008 Iveco with a ZF AS-Tronic EcoLite gearbox.

The first course of action was to carry out a diagnostic code read on the transmission system, here are the results:

  • Fault Code - 806 - Clutch Actuator
  • Fault Code - 830 - Clutch Position
  • Fault Code - 833 - Clutch Position Open
  • Fault Code - 834 - Clutch Position Closed
  • Fault Code - 900 - Terminal 30
  • Fault Code - 907 - Relay Circuit 1
  • Fault Code - 909 - Relay Circuit 2
  • Fault Code - 865 - Gear Select
  • Fault Code - 896 - CAN Error Message
  • Fault Code - 918 - Clutch Valve 2 Closed
This, coupled with the fact that all power supplies and earths were present and correct, also that other ECUs reported communication errors with the transmission ECU, meant that testing of the CAN network at the gearbox was the next step.

The CAN wires are normally easy to identify at the ECU harness as they are usually a twisted pair, however if you have a wiring diagram for the vehicle available it will help tremendously.

I monitored the CAN network using a PicoScope however any 2 channel oscilloscope will do the job and should be setup as follows.

  • Channel 1 or A - CAN High
  • Channel 2 or B - CAN Low
  • 10ms rate
  • Channel 1 and 2 or A and B - DC 5v


A quick and easy way to tell if the CAN signals and wiring to the ECU are in working order is to disconnect the plug from the ECU and measure the CAN wires with the oscilloscope. In this case the results are in the image below.


Good CAN Network Waveform
Good CAN Waveform
As you can tell the CAN waveform is as you would expect. Each wave on the blue CAN High trace has an equal and opposite wave on the red CAN Low trace. This tells me that the CAN network is normal and working correctly with the transmission ECU disconnected. 

The next test is to reconnect the plug to the transmission ECU and monitor the CAN. Here is the result from the oscilloscope.


Bad CAN Network Waveform
Bad CAN Waveform
In the above image it is clear that once the ECU has been connected it introduces a definite fault and this is most notable on the red CAN Low wire. 

This led me to suspect the transmission ECU was fault and the next step would be to remove the ECU and send it for testing and repair.

Once we received the ECU from the repairers, we reconnected it to the vehicle and was able to confirm that the fault had been repaired by clearing the codes and checking that the vehicle started, which it now does!! 

I hope you found this post informative and now have a basic understanding of CAN fault finding. 

If you like these types of articles and would like to see more please leave a comment below.

Comments

  1. Very great post. I simply stumbled upon your blog and wanted to say that I have really enjoyed browsing your weblog posts. After all I’ll be subscribing on your feed and I am hoping you write again very soon!

    ReplyDelete
  2. we'll show you the latest news that popular. We provide the latest information that comes with the new version on news sites. This site will tell da latest news updates with a different style of AishaNews.com please open and read the information.
    ZoToZ News Information and
    News Information autozie thanks.

    ReplyDelete
  3. FUCKTHEFUCKABLEFUCKEN FUCKEDFUCKER

    ReplyDelete
  4. Hi, Really great effort. Everyone must read this article. Thanks for sharing.

    ReplyDelete
  5. That is an extremely smart written article. I will be sure to bookmark it and return to learn extra of your useful information. Thank you for the post. I will certainly return.

    ReplyDelete
  6. I hope you will keep on submitting new articles or blog posts & thank you for sharing your great experience with us.

    ReplyDelete
  7. These tips proved very useful for me and for this, I really want to mention thanks for sharing it with us.

    ReplyDelete
  8. Amazing blog and very interesting stuff you got here! I definitely learned a lot from reading through some of your earlier posts as well and decided to drop a comment on this one!

    ReplyDelete
  9. It was very useful for me. Keep sharing such ideas in the future as well. This was actually what I was looking for, and I am glad to came here! Thanks for sharing the such information with us.

    ReplyDelete
  10. I am extremely impressed along with your writing abilities, Thanks for this great share.

    ReplyDelete
  11. Nice Post. All readers will definitely like this post. Looking forward to your next post.

    ReplyDelete
  12. Very attention-grabbing diary. lots of blogs I see recently do not extremely give something that attract others, however i am most positively fascinated by this one. simply thought that i'd post and allow you to apprehend.

    ReplyDelete
  13. This comment has been removed by the author.

    ReplyDelete
  14. For best auto repair in Calgary, Alberta.. visit Hose B Customs & Restoration Inc.

    ReplyDelete
  15. Thanks for sharing this post. for more info visit our webpage.
    Car Services Near Me


    Thanks
    sushmsen

    ReplyDelete
  16. This is a very useful post, thank you! I agree that innovations are the most important thing for most businesses because with today’s fast-changing world we need to stay on top of the changes if we want to survive.

    highest cash for junk cars in vancouver | cash for cars maple ridge

    ReplyDelete
  17. Thanks for sharing the useful blog about CAN error testing and repair. Keep sharing more Automotive related blogs.

    Garage Invoice Software

    ReplyDelete
  18. This is a smart vidoe. I mean it. You have so much knowledge about this issue, and so much passion. , I wish I can do clutch replacement by myself it would be really fun but I know I can’t. bt Many Autos is team is really helping and supportive

    ReplyDelete
  19. I felt very happy while reading this site. This was really very informative site for me. I really liked it. This was really a cordial post. Thanks a lot!. Export car from Australia to the UK

    ReplyDelete
  20. BIOAYURVEDA brings to you the full spectrum of the best of Ayurveda with organic ingredients and zero synthetics in vegan and vegetarian option. Offered as a holistic ecosystem across the categories of Supplements, Skin+Soin, and Superfoods, these address diverse daily needs of our wellness and wellbeing, naturally.

    blog

    ReplyDelete
  21. https://www.bioayurveda.in
    ayurvedic shop
    [url=https://www.bioayurveda.in/]ayurvedic shop[/url]

    All our products are free of any chemicals or synthetics and are purely 100% organic and natural. With international quality certifications, we offer a comprehensive ecosystem for addressing lifestyle concerns and enabling selfcare with the power of ancient Ayurveda in the modern context.

    ReplyDelete
  22. very nice
    AYURVEDA literally means the knowledge of life and longevity. With a deep understanding of Nature’s healing prowess, it offers exhaustive research developed and documented over thousands of years of trial and testing by seekers and seers of yore regards therapeutic benefits of plants, fruits, stems, roots, leaves, flowers, seeds, grains, spices, oils, minerals and other nutrient sources found in Nature.

    https://www.bioayurveda.in
    shatavari capsule
    [url=https://www.bioayurveda.in/]shatavari capsule[/url]

    ReplyDelete
  23. Thanks a lot for sharing this excellent info! I am looking forward to seeing more posts by you as soon as possible! I have judged that you do not compromise on quality. bao hiem oto bao viet

    ReplyDelete
  24. Awesome article, it was exceptionally helpful! I simply began in this and I'm becoming more acquainted with it better! Cheers, keep doing awesome! wire crimping machine

    ReplyDelete
  25. Vehicles with four x four off road and 4WD Pickups tend to be tougher on the driveshafts. we provide each front and rear shafts and tailor-made shafts (for your application) if needed. New OEM shafts additionally as re-manufactured drive shaft repair at out there, allow us to repair your existing rotating shaft assembly and you economize. drive shaft repair .

    ReplyDelete
  26. Just saying thanks will not just be sufficient, for the fantasti c lucidity in your writing. I will instantly grab your rss feed to stay informed of any updates. "AIR CONDITIONING APPLIANCE REPAIR & SERVICE

    ReplyDelete
  27. Hello
    I visit your blog and read your article. I like the information shared by you. You wrote really very well, I really like your blog and information provided by you. It is very useful information for me and for other peoples also. I hope you will share some more info about Auto Clutch Repair. I appreciate your work. Thanks for sharing such beautiful information.

    ReplyDelete
  28. AUTOMATE is the best garage management software that delivers the best features to multi-brand workshops to complete their workshop process in less time period.

    Best Garage Management System
    Workshop management software

    ReplyDelete
  29. This comment has been removed by the author.

    ReplyDelete
  30. small amount of diesel in gas engine You made such an interesting piece to read, giving every subject enlightenment for us to gain knowledge. Thanks for sharing the such information with us to read this...

    ReplyDelete
  31. This comment has been removed by the author.

    ReplyDelete
  32. The Auto Point Paisley is a company which offers the best car services and also offers Mot In Paisley

    ReplyDelete
  33. This comment has been removed by the author.

    ReplyDelete
  34. Thank you. You have shared good information for this community. The community can book a trial to take advantage of the workshop management software free.

    ReplyDelete
  35. Great Article! Worth Reading...

    Must visit https://danilchukautobody.com/

    ReplyDelete
  36. Hey nice blog,Thank's for this helpful information come back again for more interesting information…Keep it up!
    https://royaltaxi.pk/
    Car Hire Islamabad Airport

    ReplyDelete
  37. Washing Machine Repair Dubai We restoration ALL brands and models of national house appliances for instance; washing machines, refrigerator freezers,dishwashers, tumble dryers, washer ovens, cookers and dryers hobs. All our repairs happen as usual with this several months parts and labour warranty.



    Our company is the appliance revive medical experts and our engineers have already efficiently serviced home appliances for more than 100,000 houses in Dubai. Be it your Laundering freezer, Cooker, Fridge and Machine Dish-washer or Tumble Clothes dryer who has created a fault we shall do all it is possible to to correct it to suit your needs, speedily! All of our improvements are guaranteed so you can make a reservation for on the web 24/7.

    ReplyDelete
  38. Thank you so much to share the valuable content with us. Tire Center Dubai

    ReplyDelete
  39. Thanks for this Nice post.If someone needs any MOT’s, Bike MOT’s, or Tyre services in Edgware then visit at Zek MOTs

    ReplyDelete
  40. Thanks for such an informative post. You have mentioned the amazing facts. Your articles are always amazing. Keep posting!
    Car Scratch Repair

    ReplyDelete
  41. I wanted to thank you for this great read and definitely enjoying every little bit of it and bookmarked to check out new stuff you post.
    Best Digital Marketing Institute in Hyderabad

    ReplyDelete

  42. This is an informative and knowledgeable article. therefore, I would like to thank you for your effort in writing this article.
    Best Digital Marketing Courses in Bangalore

    ReplyDelete
  43. That’s one of the best blog I have came through . Best car selling software provider offers helps to increase your car sales. Get a lead generator for car dealers across the United States.
    automotive lead providers

    ReplyDelete
  44. Thanks For sharing such a perfect and wonderfull blog post really it was lovely reading this blog.Everything in this blog is very informotive and excellent and i hope you keep posting this kind of blog regularly.We provide professional bike repairs & servicing packages. You can easily select the one of your choice and our highly skilled mechanics will provide you the best possible result.At MTB Vans we are experienced and specialise in repairing & van servicing in the UK.Please Visit Visit MTB Vans!

    ReplyDelete
  45. Nice! You shared such an interesting and great ideas. I like your post and would like to read your next post.
    Thanks for sharing it. Keep updating...
    https://wawreckers.com.au/rockingham/
    ford wreckers near me

    ReplyDelete
  46. Nice! You shared such an interesting and great ideas. I like your post and would like to read your next post.
    Rent a Car from Islamabad

    ReplyDelete
  47. This is a useful blog, and thanks for giving us nice information! I agree that the information you provide which is juicy information for us
    wreckers

    ReplyDelete
  48.  I feel that it is best to write more on this matter, it may not be a taboo topic however usually individuals are not enough to talk on such topics. 에볼루션바카라

    ReplyDelete
  49. "Hmm!! This blog is really cool, I’m so lucky that I have reached here and got this awesome information.

    " 카지노사이트

    ReplyDelete
  50. "What a information of un-ambiguity aand preserveness of precious familiarity about
    unpredicted feelings." 먹튀검증사이트

    ReplyDelete
  51. Really a great addition. I have read this marvelous post. Thanks for sharing information about it. I really like that. Thanks so lot for your convene. charge tesla

    ReplyDelete
  52. Adams Automotive Services in Houston, Texas is a full service automotive repair shop that believes in honesty, integrity, and professionalism. Call us today.

    ReplyDelete


  53. We are really grateful for your blog post. You will find a lot of approaches after visiting your post. Great work thank you.
    Data Analytics Course in Chandigarh

    ReplyDelete
  54. Love this post! This is a really good post wish more people would read this, you offer some really good suggestions on Bureau of Automotive Repair. Thanks for sharing.

    ReplyDelete
  55. Thank You For Sharing!
    Our company is one of the most trusted roofing contractors in Stirling and FLAT ROOFER FALKIRK, offering full commercial roofing services and support. We are an award-winning roofers who have been successful for over 15 years because of our passion for what we do. We operate across the Falkirk area, serving customers throughout Stirling and Falkirk. Our friendly team works hard to ensure that all our customers are 100% satisfied with their project or service.

    ReplyDelete
  56. We provide the greatest calibre roofing in Scotland, and we are only a phone call away. We also provide an all transparent roofing option.

    Safeway Roofing offers roofing in Scotland that is of the highest standard, and our services are just a phone call away. We are trusted Roofing Company Falkirk and We also offer a completely transparent service when it comes to price.

    ReplyDelete
  57. This comment has been removed by the author.

    ReplyDelete
  58. I think I have never seen such blogs ever before that has complete things with all details which I want. So kindly update this ever for us.
    full stack developer course

    ReplyDelete
  59. if you are looking for Rolls Royce Services in Dubai then i will recommend you one of the best Car repair service in Dubai. they have expert technicians of experience of 15 years and can fixed thousands of Broken cars

    ReplyDelete
  60. Thank you for sharing your insights on the topic of error testing and repair. As you mentioned, errors can occur in any system, whether it's a mechanical or digital one. And in order to ensure the system is functioning properly, it's crucial to identify and fix those errors.

    I appreciate the way you outlined the various types of errors that can occur, such as logical errors and syntax errors, and how each requires a different approach to testing and repair. It's also helpful to know the different tools and techniques that can be used to identify and fix errors, such as debugging and testing software.

    One point I found particularly interesting was your discussion on the importance of proper documentation when it comes to error testing and repair. As you mentioned, keeping detailed records of the testing and repair process can help prevent errors from occurring in the future and can make it easier to troubleshoot issues down the line.

    Overall, I found this post to be informative and well-written. Thank you for sharing your knowledge on this important topic!
    As I like your writing skill; can you write on cash for cars brisbane topic.

    ReplyDelete
  61. Very nicely written article. Looking forward to many more articles in the future.
    Mini Electric Bike

    ReplyDelete
  62. There are many reasons for ship a car overseas. Relocating for a job, a new car purchase, holidays abroad or a military deployment are just a few of the most common ones. Shipping a car overseas doesn’t mean stacks of paperwork, documents, and hours of navigating through customs clearance. At Trans Global, we know the best and easiest way to ship a car overseas. As a leader in the shipping industry, we can help you ship your vehicle to its new destination.

    ReplyDelete
  63. If you are preparing to import my car, you’ve come to the right place. To help you get started, we have created this guide on the UK car import laws. The following article is not to memorize all the details of the UK import requirements — you can leave that to us — but to get a sense of how everything works and what steps are required.

    ReplyDelete
  64. A Quick Look At CAN Network Testing
    "A Quick Look At CAN Network Testing" provides a concise and informative overview of CAN network testing. 8194 The Importance Of Two Factor Authentication 2Fa For Online Accounts.Html It simplifies a complex topic, making it accessible to both professionals and enthusiasts. A valuable resource for understanding and troubleshooting CAN networks effectively.

    ReplyDelete
  65. Looking for Top Gearboxes Dealers In UAE We have full product list like Screw Industrial gearbox, Automatic gearbox, Manual Gearbox, Gear Motors etc.

    ReplyDelete
  66. Wow, your article on mindfulness techniques is fantastic! I've struggled with stress for a while, and your tips on meditation and deep breathing have already made a difference in my daily life. Thank you for sharing these practical and effective strategies. sound deadening roll

    ReplyDelete
  67. Thoughtfully explored the cultural factors with evidence. The possible implications raised are concerning to consider. More discussion seems needed on this issue. Some alternative proposals would make the arguments even more compelling overall. Still, enjoyed the thought-provoking discussion. sound deadening roller

    ReplyDelete

Post a Comment

Popular posts from this blog

Volkswagen Audi Skoda VAG Engine Management Fault Codes!!

BMW Fault Codes (Hex Codes)!!

Ford Engine Management Fault Code Identification!!