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AC Compressor HES33
Posted: Wed Apr 06, 2022 3:09 pm
by EV_Builder
Anyone gave this one already a go?
Part nr: 1063369-00-G
Pin 1: 12VDC
Pin 2: CAN+
Pin 3: CAN-
Pin 4: GND
Connector = Molex 33472-0401
- molexac.PNG (20.63 KiB) Viewed 1681 times
Update:
CAN ID:
0x223
0x233
0x363
0x223:byte5 higher nible bit 0 toggles on reception of 0x28A;
0x233:byte0 & byte 1 contain HV voltage (45 02=60VDC, 7A 01=40VDC)
0x363: Firmware info/data;
Re: AC Compressor
Posted: Fri Apr 15, 2022 10:03 pm
by EV_Builder
Ok got it to spit out some messages... (it needs a bit of HV connected)
0x223
0x233
0x363
0x223:byte5 higher nible bit 0 toggles on reception of 0x28A;
0x233:byte0 & byte 1 contain HV voltage (45 02=60VDC, 7A 01=40VDC)
Re: AC Compressor
Posted: Sat Apr 16, 2022 9:36 am
by muehlpower
017A = 37,8V ?
0245 = 58,1V ?
Re: AC Compressor
Posted: Sat Apr 16, 2022 9:59 am
by EV_Builder
Yeah could welk be the case my LAB power supply is not from A brand. What is your formula?
0,1Vdc / bit.
Re: AC Compressor
Posted: Tue May 17, 2022 11:00 am
by Dylan Witt
i found a pdf on the control chip, it works the same as the older tesla compressors, tx-rx but the hes33 uses a can bus decoder of some sort, im currently trying to get mine working. posted some pictures of the control board hoping someone could help us out
Re: AC Compressor
Posted: Tue May 17, 2022 7:06 pm
by EV_Builder
Ok; i have it figured out but don't have the compressor hooked up yet to test.
Do you use VCU?
Re: AC Compressor HES33
Posted: Wed May 18, 2022 7:11 am
by EV_Builder
Next stop: is the sensors of the Tesla AC system.
They are temperature and pressure in one housing.
I will make a look up table for each sensor (black one and green?!? one).
My idea is to use my IO module (or a new design based on it) for controlling the AC pump, the waterpumps , valves and reading in the sensors.
Together that makes like a THC controller.
Re: AC Compressor HES33
Posted: Thu Jun 09, 2022 5:17 pm
by EV_Builder
I'm looking for this connector someone can help?
Re: AC Compressor HES33
Posted: Sun Aug 14, 2022 10:11 am
by tg1929
Hi All, I have a 2019 model 3 write off that is still running and in working order including a functioning AC system. I am interested in trying to assist in reverse engineering some of the ancillary devices like the AC and the coolant pump as a way of contributing to this forum. Ultimately I would like to use as much of the car as possible in a conversion project.
I have done some can sniffing on the can bus connected to the AC compressor, so far with little success. I could not identify any messages changing in a consistent way by turning the AC system on and off via the control screen.
If anyone has any suggestions or specific tests they want run on a working system please send a reply and I will endeavour to assist.
Re: AC Compressor HES33
Posted: Fri Dec 16, 2022 9:33 pm
by johnspark
tg1929, you could try with different temperatures of the compressor, if feasible, try with different high voltages, it might register pressures, I don't know how you would check that easily...
Re: AC Compressor HES33
Posted: Sat Dec 17, 2022 12:06 am
by johnspark
You can also try over-voltage HV, under-voltage HV, over-voltage LV, under-voltage LV, same with current but not sure how you can create an overload situation...