SL/R230: CAN Bus Distribution Block Help
#1
Junior Member
Thread Starter
CAN Bus Distribution Block Help
Does the order/location of the individual connections matter on the CAN bus distribution hub? If so, what would be the best way to figure out which cable goes to what system? this picture is not X30/17 but is a visual hint of what I'm talking about.
If location does matter, on the diagram contained in the PDF, note the order of connectors, 1, 3,5, 6,7,8,9,10,11,2
Assuming left-to right ordering, is the second from the left position #3 or #2 ?
If location does matter, on the diagram contained in the PDF, note the order of connectors, 1, 3,5, 6,7,8,9,10,11,2
Assuming left-to right ordering, is the second from the left position #3 or #2 ?
#2
Member
No, it does not make a difference as they are all parallel with each other.
However as you see on the schematic they are numbered and assembled that way when the car is built.
There are two signals on this CAN bus, CAN Low (the brown wires) and CAN High (brown wire with a red or black tracer.)
The black / black-white wires connect to another distribution block somewhere else in the car.
The second from the left position is #2 but all are functionally interchangeable.
However as you see on the schematic they are numbered and assembled that way when the car is built.
There are two signals on this CAN bus, CAN Low (the brown wires) and CAN High (brown wire with a red or black tracer.)
The black / black-white wires connect to another distribution block somewhere else in the car.
The second from the left position is #2 but all are functionally interchangeable.
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mb_texas (04-09-2023)
#4
MB_Texas, where is this CAN bus? Or more to the point, the CAN bus distribution block that you are referencing? I need to find it, I'm into the passenger side footwell, carpet and cover off, subwoofer enclosure out and can't see anything that looks right.
Last edited by KLinNBC; 12-15-2023 at 05:30 PM.
#6
As it's developed I need to find X30/18 which I believe is the sole CAN C block, all the others are CAN B. And I believe that X30/18 is in the left side door sill. Can anyone confirm or provide better info?
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KLinNBC (12-15-2023)
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#9
Senior Member
Just a quick note, removing the CANBUS plugs can be quite confusing and challenging.
Here are two pictures I took showing how they come out.
To remove the locking cover, press in the two tabs, one at each end, and the whole cover (with tabs) slides sideways from the main plug.
Then use a small screwdriver press in tab of individual plug to enable it to be released.
Here are two pictures I took showing how they come out.
To remove the locking cover, press in the two tabs, one at each end, and the whole cover (with tabs) slides sideways from the main plug.
Then use a small screwdriver press in tab of individual plug to enable it to be released.
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KLinNBC (12-16-2023)
#11
Senior Member
Junior, I wonder why are you accessing the CAN C..? Perhaps you are having the same issues I am having..! A DTC tells me about a miscommunication issue that points to one of the subsystems connected to CAN C.
I have not have the time to dig into that but suspect it may be a contact issue due to corrosion on one of the terminals..! Please let me know your findings and results!
Thanks,
I have not have the time to dig into that but suspect it may be a contact issue due to corrosion on one of the terminals..! Please let me know your findings and results!
Thanks,
#13
X30/18
Hi please help i have a no crank no start issue my scanner has led me to this connector x30/18 when I got to it the connector next to is was wet and corroded i have sorted that but still have the same issue? I am getting all negative signals on x30/18
#14
Senior Member
To check this connector you will need an oscilloscope, checking each wire to ground. You should see a "square wave" or pulses on each wire when they are communicating.
All voltages are low, around 5v against ground.
If you put your multimeter on AC voltage you may be able to read an average value depending on how good the meter is, but an oscilloscope is the correct tool.
However if you have diagnostics you should see which modules are inaccessible.
If they are all inaccessible through this connector then you should be looking at EIS or diagnostics module.
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MR.AMG. (06-22-2024)
#17
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'99 and '05 E55 AMG
Both on and off. There is voltage on the CAN bus whether asleep or awake. Use a multimeter, oscilloscope, or CAN bus analyzer. The third link deals with a no crank, no start issue solved by disconnecting a bad transmission control module that was nuking the CAN bus. Once identified, the tech replaced the bad module.
https://mbworld.org/forums/e-class-w...is-repair.html
https://mbworld.org/forums/e-class-w...-part-2-a.html
https://mbworld.org/forums/w211-amg/...-no-start.html
https://mbworld.org/forums/e-class-w...is-repair.html
https://mbworld.org/forums/e-class-w...-part-2-a.html
https://mbworld.org/forums/w211-amg/...-no-start.html
Last edited by bbirdwell; 06-16-2024 at 10:12 AM.
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MR.AMG. (07-04-2024)
#18
Senior Member
Birdwell, thanks for all this info......now I got deeper issues and need to start digging on the CAN modules! I really wonder why the MB techs wanted to implement such a complex electronic control system..! Perhaps they wanted the quasi-mechanic owners to go to the dealer's shop which needed to generate revenues!
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'99 and '05 E55 AMG
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MR.AMG. (06-23-2024)
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MR.AMG. (06-23-2024)
#23
Senior Member
Was the ignition turned ON when you used your diagnostics? Terminal 15 is generally the ignition ON supply.
If this is missing you will get a multitude of other faults.
If this is missing you will get a multitude of other faults.
#24
Hi yes ignition was on and now the whole power is getting cut out after like 10secs I really thought repairing the wires would've solved it but seems like something else has gone on after the water damage
#25
Hi yes ignition was on and now the whole power is getting cut out after like 10secs I really thought repairing the wires would've solved it but seems like something else has gone on after the water damage