Search found 9 matches
- Sun Aug 06, 2023 4:07 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
Just a quick update, the SDU was in fact dead. Again not sure what happened, since I had it running months before with the same set up. Installed only another Inverter with the openinverter board on the first SDU and it did not work. So installed the second complete SDU with it´s Inverter and the sa...
- Sun Jul 16, 2023 3:36 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
The shorted high side indeed does not sounds good, though it shouldn't inhibit precharge. Is the precharge resistor still ok? Could there be a bad solder joint on the gate driver connector? The prechage resistor is the Tesla OEM one, the 23 ohms one, it is still giving this resistance when tested w...
- Sat Jul 15, 2023 7:27 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
I have put it back together, but this time it would not even pre-charge. Udc was 1.44 volts. I cannot understand, it was 318 yesterday and pre-charge was working. I have done the IGTB test using a 12 volt limited power supply just to be sure with one 12 volt bulb 1. positive to DC+, negative to one ...
- Sat Jul 15, 2023 3:13 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
Now measured voltages on IC5, with HV connected, HVIL switch closed, same result before and pressing start. IC5 Pin1: 4.96V - Gate drive fault signal A - ok Pin2: 4.96V - Gate drive fault signal B - ok Pin3: 3.75V - comparator output - ok Pin4: 4.96V - Gate drive fault signal C - ok Pin5: 0V - Gate ...
- Sat Jul 15, 2023 12:34 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
Just checked again both Current sensor voltage, with HVIL switch closed both are the same: 5V: 5.0 V OP: 2.5V REF:0V 0V:0V Voltage after R56 resistance also read 5 volts. I don´t know what happened yesterday to be getting those odd measurements. Today I double checked with two multimeters, both with...
- Sat Jul 15, 2023 11:36 am
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
Measured:
R56 - 9.5k ohm
R58 - 7.9k ohm
I bought it from an EV shop, not sure they bought it from you.
Number: 2881179A_Y79-2201110
R56 - 9.5k ohm
R58 - 7.9k ohm
I bought it from an EV shop, not sure they bought it from you.
Number: 2881179A_Y79-2201110
- Fri Jul 14, 2023 10:37 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Re: Dead SDU? or not?
Took the inverter out and the phases do not appear to be short. Checked both Current sensor voltage, with HVIL switch closed both are the same: First measurement: 5V: 5.7V OP:2.85V REF:0V 0V:0V Second measurement: around 4 min later 5V: 6V OP:3 V REF:0V 0V:0V Something is wrong with the 5 volt suppl...
- Fri Jul 14, 2023 12:05 pm
- Forum: Tesla
- Topic: Dead SDU? or not?
- Replies: 15
- Views: 1024
Dead SDU? or not?
Dear forum, I am building a Porsche 911 classic, with a Tesla SDU using openinverter board V7, MEB batteries, Orion2 BMS, 6.6 Kw charger (OBC) and Low Voltage Power Management Unit. A few months ago I tested this setup on the bench and I got the motor to spin without any issue. This was done just wi...
- Mon Feb 21, 2022 5:17 pm
- Forum: Classifieds
- Topic: Various EV parts for sale
- Replies: 47
- Views: 8724