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Hello everybody,
Until today I have many electrical issue with my car, it worked well for about 2 years.
I did change both battery same issue, Any one has that problem before, Please help
I'll try to help you. I can only help identify the problem, but diagnosis of these type issues are just too complex online.
By the VCDS printout you posted here it appears you've lost at least one of three major CAN bus segments of the system. CAN issues are very high on the list of complexity. CAN bus issues can also contribute to numerous other simpler diagnostic issues in a "false reporting" way, and I know you've recently been plagued with them. Now the question is - were they real?
First, a little primer of the topology in the car:
The system uses a 3 tier CAN network, both low and high speed networks. They are:
Infotainment
Comfort
Powertrain
These 3 systems all interact constantly and the modules along the bus in each architecture are constantly pinging. The top of the architecture is the infotainment bus. The instrument panel acts as the central point of the entire architecture.
In your case, it appears you've lost the "Comfort" architecture at address 19. All the modules showing faults under 19 are along the Comfort architecture. These probably all do not need individual addressing. It is probable you've lost the comm path to all of them. Unfortunately, it is pretty impossible to guess here if a module has failed, or this is a cabling issue. It could also be a failure at the top of the topology at the infotainment level causing the Comfort topology to drop out.
That is about the end of the help I can provide. I am sorry I cannot even get you at more of a specific starting point.....Maybe the instrument cluster.
Here is a map of the comfort tier. The modules showing failures on your VCDS are in this structure. Again, I wouldn't guess all these modules have failed, rather the pathway to/from them has.
In this image, look at the bold arrows and you can see where the Infotainment and powertrain topos enter and exit the Comfort topo.
@Bwings : I did pm you, please read it...
anyway I removed the Instrument cluster, then I turn on the car but the problem still the same, so Is that mean my Cluster is good?
do u think I should disconnect one by one module in Comfort CAN?
Very difficult to advise you how to proceed. I do not think the issue is with any modules on the Comfort CAN (But that could be wrong). Those modules are suffering because they are not allowed to ping or receive pings on the CAN.
Instead, my instincts are the problem is an interruption to the BUS itself. That interruption could be coming from the powertrain structure or (more likely guess) from the infotainment structure. Refer to the CAN topology I posted above. Please look at the main CAN bus running horizontally through the center of the structure, look at the far right side and see the entrance/exit of signalling from the Powertrain and Infotainment structures.
I posted that topology for information and the coincidence that all of the failures shown on your VCDS list are modules listed in this architecture. Again, it is not very probable every one of those modules are defective. Instead, you see they all report "intermittent" meaning they cannot send or receive their ping signals at regular intervals. I deduce all these modules are good. My inclination is to look at the BUS pathway.
NG - One thing I can mention. I do NOT like giving this advice because of the complex process and the drawbacks to disconnect batteries.
A place that you can start is to completely clear all data in volatile memory on all of the modules in the car. Then restart, let all of the modules reboot see if this fixes the issue. A complete power down causes all the modules to reboot.
Steps:
First use VCDS to delete ALL CELS. Use the global delete function in VCDS
Then, remove all battery power FOLLOW the Bentley sequence to disconnect batteries (important). I posted these in other posts on the board.
Next WITH BATTERY TERMINALS REMOVED FROM BATTERIES, touch and hold the POSITIVE battery cable to chassis ground, or the negative cable and hold for 3 minutes. This drains all the capacitance from all of the modules.
Now reconnect the batteries in the CORRECT sequence according to the Bentley manual.
Place the key in the ignition, turn to start but do not start the engine; cycle back off and remove the key.
Now Start the engine and let idle for 5 minutes. This start will get engine warm enough to start closed loop.
Now drive the car to reset everything after battery disconnects.
Recheck, see if address 19 failures come back.
Hi All,
I found out the issue, Water come in to the CAN splitter make it corrosion ...and short to GND
I post a Pic here if anyone has the same issue can fix it
