Thank you so much for posting this video with the main theme being helping others. It is awesome to see the topics we discuss and the applications shared being used at the coal face to help diagnose problems in the real world. Thank you again as these videos can take ages especially when you are filming, narrating and using the equipment all at the same time
Very clever idea. So, as you show, the current clamp tells you when the packet is coming from the module you are next to. In your video, you were getting pull-downs even when the module you were next to was NOT talking, so you knew that module wasn’t causing the problem. You’d keep doing that, ticking off as good, all those modules that don’t cause the pull down. Eventually, you’ll come to the module that shows the pull-down every time it talks, and the pull-down never occurs when the module is silent. At that point, you know you’ve found the dodgy module. Correct? Very clever use of the current clamp. Am I right in thinking you were lucky that plugging your breakout box into the DLC allowed you to see ALL the CAN traffic, because with some CAN topologies, where a gateway is involved, you cannot see all the CAN traffic from the DLC, in which case you’d need to access each module (or pierce the CAN wires) to pick up CAN High and CAN Low at the module? Have you used the clamp in a similar ingenious way anywhere else other than on CAN networks?
Yes that’s correct and unfortunately this has gateway module so case wiring diagram figure can topology out and what modules are on what network and then attack it from there
wow. This technique is very cool. First time I seen that. what current clamp are you using, also what is the maximum point(how far)that you can be away from the module to pick up the current signal? And my last question, I couldn't understand, what you was saying on the video, how much was the current on the laptop screen. I subscribed immediately.
I’m sorry but I’m confused. If the module that has the drop out has current it’s the bad module. But you have drop outs in the scope from other modules?Wouldn’t one of those still have current if you were clamped in? Please explain if I’m seeing it incorrectly. Ps i love this new approach. Just need to fully understand it. Thank you
The current flow is nothing to do with it being bad. current flows in good modules too. When you have a bad can signal we want to know which module. You have to work out area ti start looking and pin down this works by you put clamp near that and as current flows that data packet is for that module. So in this vehicle data was faulty for several modules on left hand side if car this helped me section vehicle down quickly and find a bad can block. I hope this helps if not I will try get some time and do another video
So basically, because it's just one packet dropping out that's confirmed it's a single module. Then using the current flow lined with the CAN transmitted it can be identified. Current flow lines with good node all ok Current flow lines with drop out that's the bad module.
Sorry mate, I don't see which module is being ID'd, I love the amp clamp test but I still need to go locate and bypass (my style) the suspected module CAN in to out lines, to verify no more amp increase when bypassed, cheers.
So the one where the current rises is that module. As that data packet and current. If clamp is next to that module then that one with issues. Then you can move along and be x,y,z modules are all being affected. In this case was left hand side of vehicle. Then a faulty can block was found Helped section vehicle down. Hope that explains it better
@@soptea it probably won’t unless it’s only doing on certain phases which pony you could pin down certain part of vehicle maybe it’s not a be definitive use for every case more if another tool in box but like we all have more than one 10mm spanner all used to help us in a different way
@@lawsonthursfield6950 hopefully it can give other some ideas for testing and things time is money and also we all know how much nightmare removing trim can be. Or Ecu that are buried if can get close ish just open loom up a bit might give you a yes no approach
