Tesla Large Drive Unit Support Thread

[bmwx5projet]

the voltage on C6 measures 11.76 the strange thing is that the battery has 12.7V and why does it drop. buy the card directly at open inverter Shop. I will send you the photo of it, it is a V4B, and I have also noticed that all the points of the ampseal connector output 5V, I only have 3.4

[bmwx5projet]

Ok, so the 5V regulator does not produce 5V.
Now what is the voltage on C6? What is the feedback voltage, i.e. across R33? What is the total current draw of the board? Can you post a high res picture of your board? Where did you obtain the board?

[bmwx5projet]

Ok, so the 5V regulator does not produce 5V.
Now what is the voltage on C6? What is the feedback voltage, i.e. across R33? What is the total current draw of the board? Can you post a high res picture of your board? Where did you obtain the board?

I was wrong this is a V5

[johu]

the voltage on C6 measures 11.76 the strange thing is that the battery has 12.7V and why does it drop. buy the card directly at open inverter Shop. I will send you the photo of it, it is a V4B, and I have also noticed that all the points of the ampseal connector output 5V, I only have 3.4

A bit of drop is normal, but should be more like 0.5V. Something is loading down the 5V rail.
I will also check if something is wrong with the 5V reg
EDIT: checked on a board here, it produces 5.3V

- Can you check again with all BUT the ampseal connector disconnected?
- Does anything heat up?

[bmwx5projet]

ok i will do a review and let you know

[bmwx5projet]

A bit of drop is normal, but should be more like 0.5V. Something is loading down the 5V rail.
I will also check if something is wrong with the 5V reg
EDIT: checked on a board here, it produces 5.3V

- Can you check again with all BUT the ampseal connector disconnected?
- Does anything heat up?

Greetings, I was looking at the description of the LD1 voltage regulator and it is AMS1117-3.3 and it is a regulator whose output is 3.3v. No matter what its input is, from 4.5 to 15V, 3.3V come out, which means that the correct voltages are coming out. , which is not 5 but 3.3V. Is this analysis correct?

[johu]

Yes, but before that is a 5V regulator that supplies some parts of the circuit and also the throttle pedal. So 5V goes into LD1, 3.3V comes out. I had you measure across the INPUT and that was 3.4V, too low.

[bmwx5projet]

Yes, but before that is a 5V regulator that supplies some parts of the circuit and also the throttle pedal. So 5V goes into LD1, 3.3V comes out. I had you measure across the INPUT and that was 3.4V, too low.

ok, I understood, then what can it be, I also have the problem that the signal does not come out on pin6 to activate the main contact.

[johu]

ok, I understood, then what can it be, I also have the problem that the signal does not come out on pin6 to activate the main contact.

Please do above checks to further isolate the issue

- Can you check again with all BUT the ampseal connector disconnected?
- Does anything heat up?

[bmwx5projet]

ok, i'll do it and let you know. How can I get the schematic of this V5 card, the one on the page is the V4B. and I'm using it as a parameter to review. but it's not exactly here.

[johu]

It's on my repo https://github.com/jsphuebner/Tesla-Dri ... /master/V5

[bmwx5projet]

Hello, I started doing some follow-up tests and this is what I saw, 12v arrives at lC1 but 4.1 comes out for L1 and 3.4V comes out of L1. what I can deduce is that IC1 is the one that must take out the 5 V to L1 which is an inductor. what do you think?

[johu]

It's hard to help if you don't follow instructions
- what is the current draw?
- does anything heat up?
- do you obtain 5V out of the inductor L1 with all connectors unplugged and only 12v supplied to the board?

[bmwx5projet]

I'm sorry, I hadn't understood the instructions, but yes, I already removed the connectors, just leave the ampseal connector and 5.35V comes out through L1 and 5.35V arrives at LD1 and comes out of LD1 3.3 is correct

[bmwx5projet]

I dared to reconnect the connectors one by one and measure the voltage and the drop that occurs when isense is connected. If left unconnected the voltages remain constant.

[johu]

Ok, so it is diagnosed, something is dodgy with the current sensors then. You can leave them disconnected for some gentle spinning tests as the current values are not needed by the motor control loop.

Then you should find out why they draw so much current and which one of the two draws so much current. Maybe you need a replacement?

[bmwx5projet]

Hola, hoy trate de hacer girar el motor y no tuve éxito, lo intente usando el botón de la web, ya que la señal negativa del acelerador no me está llegando después todas están bien y las señales de los contactores también están llegando y los voltajes también silo esta no me llega.una pregunta: el encoder debe estar conectado para que funcione?

[bmwx5projet]

Hi today i tried to crank the motor and i was not successful i tried using the web button as the throttle negative signal is not getting to me after all are ok and the contactors signals are also getting through and the voltages Also if this doesn't work for me. One question: must the encoder be connected for it to work?

[bmwx5projet]

Another question, apart from the lights on the card, shouldn't the inverter turn on some indicator lights to know that it is activated?

[bmwx5projet]

hello, forget the two messages, leave the inverter disconnected for a moment and the signals are already working. but there is a problem when activating the card the signals go out through pin 3 and 6 at the same time and the precharge relay is not deactivated. However, when I disconnect the high voltage, it is deactivated. What could be happening there since pin 6 must act when the precharge comes out.

[robinhood]

hello can someone possibly share the gbrl file to print a single open source ldu pcb board. I have a tesla ldu out of a SE toyota rav4ev. do i even need one for this drive unit? thinking tesla possibly has less proprietary structures in these units since tesla supplies the LDU to toyota.? prying i could just re flash the original mcu with open inverter with a rs232 usb to can adapter does open inverter have a gui app? where PID rates are shared lol is this ideal logical? should I piss off and give up on life? Riding my combustion dinosaur into the sun? the siounds the smell... the thought of ware and maintenance I hear has been solved help me.
help thanks in advance,

[Boxster EV]

hello can someone possibly share the gbrl file to print a single open source ldu pcb board. I have a tesla ldu out of a SE toyota rav4ev. do i even need one for this drive unit? thinking tesla possibly has less proprietary structures in these units since tesla supplies the LDU to toyota.? prying i could just re flash the original mcu with open inverter with a rs232 usb to can adapter does open inverter have a gui app? where PID rates are shared lol is this ideal logical? should I piss off and give up on life? Riding my combustion dinosaur into the sun? the siounds the smell... the thought of ware and maintenance I hear has been solved help me.
help thanks in advance,

Just buy a logic board from the Open Inverter shop.

FWIW, I don’t think anyone is running the Toyota variant in a conversion due to the challenges with connectors - they are different to the out and out Tesla units.

[johu]

hello, forget the two messages, leave the inverter disconnected for a moment and the signals are already working. but there is a problem when activating the card the signals go out through pin 3 and 6 at the same time and the precharge relay is not deactivated. However, when I disconnect the high voltage, it is deactivated. What could be happening there since pin 6 must act when the precharge comes out.

I don't quite understand your issue yet, so will just give you general info
- Pin 3 becomes active as soon as you power up the drive unit - if less than udcsw/2 V are measured after 5s it will drop
- Pin 6 becomes active as soon as you give the start signal (12V, pin 23) AND udc>udcsw

[bmwx5projet]

ok, this is what happens, I made the connection according to the diagram, when I connect start, the card is activated, negative relay and precharge, which is what should happen right. but the pin 6 signal is also being activated and the precharge stays activated

[bmwx5projet]

In short, pin 3 and pin 6 are being activated since I started without activating the 12V of pin 23