Hi, just checking was this working before and has now stopped ? if so normally these pumps have a 3rd wire which is wired to IGN, probably best to check that its still got the IGN 12V signal. the vw version of this pump has been known to fail from time to time and it might just need replacing. Hi y...

You need to reverse engineer the power supply on the board, look for big caps, diodes and chips with big heat sink or on big pads. then look at datasheets. Well, these are the times I notice I am a software engineer :shock: But it seems that the positive and negative are not that hard. This is the ...

I'm struggling with the pinout. The CAN bus was very quickly found, a twisted wire and measuring 120 Ohm.
There are enough indications of what 12v+ is, the ground perhaps also, but probably needs a wakeup / key on kind of extra signal.

I'll post some pics later

Ok thats great. It sure would be nice to have the pinout, although it probably just requires some trying to apply 12v and what not. I don't really have a clue to start on, it will just be trying. Hopefully I can identify the CAN wires as they are often twisted. But yeah, I'm sure there is a pretty b...

By the way, these are the temperature sensors, two per module. I haven't tried much other than to measure resistance over pins that weren't giving any cell voltage (so they must be sensor related) but I could measure any resistance value over any combination. So probably something digital or somethi...

I will investigate. Maybe I build the BMS and try it. In this case, being at the BMU level will be easier. I'm interested in seeing what the BMU looks like :) Does the above answer some of your questions? Probably not, it may require some signal level debugging. I don't have a (usb protocol) scope ...

Here the full Infineon microcontroller part number https://www.infineon.com/cms/en/product/microcontroller/32-bit-tricore-microcontroller/32-bit-tricore-aurix-tc2xx/aurix-family-tc27xt/sak-tc275tp-64f200n-dc/ Schermafbeelding 2024-04-07 204410.png So, it seems this MCU talks to the Panasonic BMICs t...

Ok so I opened the BMU. That should give some people some more clues. I didn't do any power up and checking for communication or anything, just opening and taking pictures. The BMU is on a liquid cooling plate. It turns out the main BMU PCB has an Infineon tricore mictrocontroller on there. I guess ...

Well, all I can say is keep up the good work.

The BMW REX might not be perfect, I think it is one of the only options around for DIYers looking for a compact range extender.
All the alternatives are much bigger engines integrated into a drivetrain.

Regarding the power steering, I have sent out some questions, if all these paths run dead (quite likely) I will go for something more simple. I'm thinking these Opel pumps as they can be enabled very easily and very cheap. But yeah, such a controller with GPS is nice too. > He said he bought it from...

It also looks similar to the Ford Galaxy pump BG91-3K514-AC. I found some info for a Ford pump here. https://www.diyelectriccar.com/threads/azure-ford-electric-steering-pump.88303/ Thanks, it looks to be the same physical pump, but the rest I'm not sure. The pump doesn't announce itself with the CA...

Oh, I found a part number that I didn't find before opening this topic. Part number A0016240, so it as an EHPS pump from a W221 Mercedes S-class. Apparently it can also be found in a Porsche Panamera and Cayenne/Touareg (with a VW sticker on the pump) This might give more clues to find some CAN bus ...

I made a seperate topic for this power steering pump. I did some CAN bus debugging, but without any further info, it is quite hard.
It probably needs to be replaced.

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Does anybody have a vague idea on these Electric Hydraulic Power steering pump? It is already installed in a broken EV van. It is CAN bus controlled. All the black boxes in the van (which don't get into drive state) actually are sending something to this EHPS pump, but nothing is happening. IMG_2024...

The vauxhall/Opel Corsa D EPAS have been used in motorhomes and other large Mercedes vans to success. I plan on swapping my van to the Corsa D EPAS when I pull the ICE engine for EV conversion. So with the electric motor on the steering column? That seems like quite some work to me. The van I have ...

Doing some basic testing, with some questionable cabling :mrgreen: The cables are shielded though, and I'm just driving 50 meters and stopping again. PHEV battery pack for testing on a pallet, forklifted in the rear of the van. Convenient. IMG_20240331_165228.jpg Now, I've got to figure out this ele...

Interesting - this company used to reside 3 km down the road from my place in the "Nibler Turm". I once applied for a job there when it was already in Chinese hands. The whole situation was super awkward and I wasn't surprised when they went bust. You were probably at the auction that Nib...

So, I bought an electric van that was broken, and it was made by a small German company that already went bankrupt. This one was one of their last, in 2015. elektrische sprinter.jpg It basically is a Mercedes Sprinter with a Siemens ELFA2 drivetrain (motor and inverter) mounted to the 6 speed gearbo...

You seem to be confused The sbox does none of the BMS functions it basically measures current through and pack voltage and has control over the contractors I was not confused, I was basically asking if it is a BMS or not. So in these BMWs the BMS function is in the car instead of in the pack. Like ...

Question about the S-box. It reports all cell values, and you can ask it to close contractors. But does it balance the cells by itself? In other words, is it a true BMS function? And voltage cutoff when discharging etc? I'm guessing those features are not there and will need to be implemented extern...

I'd like to make it as OEM like as possible, with a suitable 3rd party charger and DC to DC, perhaps with a board or CAN bridge to translate. unfortunately, space is limited. Jamie Did you ever put this through? Lots of these cars are failing on the OBC and DCDC Friends had theirs repaired, but its...

boekel wrote: ↑Wed Mar 20, 2024 5:21 pm that will be difficult, and I prefer not to take them apart. Do you know what build dates have those packs?

Be careful with the forklift as those packs with short modules are light on one side (just air in that part), and heavy on the other side.
They might fall off.

Thanks. I got it from asking a mechanic to look into some Hella software that features all kinds of cars. Yours is some specific Mercedes info? It might be useful, since I also need to use parking brake and regular brake pedal. Although those will be fairly straight forward. I'm not sure if there is...

To answer my own question, here is the wiring below (note that 5 and 6 are swapped in the picture), all the coloring matched. Schermafbeelding 2024-03-20 201754.png So I didn't get anything by measuring resistance. Knowing the right pins to apply 5v, and I could see the voltage change with pressing ...

Yes thanks I found that one also, but I dont measure resistance like that.
Only 22kOhm over 2 pins, nothing on the rest.
It really has a PCB with an IC in it, so it probably only works when powering the right pins with 5v