Hi.
I've rebuild a LDU and performed the coolant delete.
The fet's measured fine (according to diode measurment as Damian describes).
But when all is connected and I'm starting up with gui (No HV yet) I get overcurrent error.
Found a post with similar and removed the cover over the inverter but no LED's located on "tesla gate driver PCB" are on.
Started to measure some on the open inverter PCB, and got these values:
FAULT_LA = 0V
FAULT_HA = 4.95V
FAULT_LB = 3.4V (? shouldn't this be 5V signals?)
FAULT_HB = 4.95V
FAULT_LC = 5.1V
FAULT_HC = 4.9V
So I suspect LA and then LB also seems a bit fishy.
Then I started to probe on the gate driver PCB, slipped with probe and shorted a pin propably towards the 12V and now it's draws a lot of current and is certainly dead.
So any inputs are much appreciated.
And if someone happens to have a gate driver PCB (or two) lying around I'm happy to buy it.
EDIT: I have the red gate driver PCB's...
BR
// Per
LDU "False" overcurrent
Re: LDU "False" overcurrent
Some update.
The fault signal is "shorted" (1.8ohm) to ground somewhere on the gate driver board.
The fault signal from the infineon IC is not shorted so it's not routed directly to the connector.
I've managed to get hold of another PCB and this seems to work so fault searching on these boards is put on hold for now (prioritizing to get the motor back in the car)
The fault signal is "shorted" (1.8ohm) to ground somewhere on the gate driver board.
The fault signal from the infineon IC is not shorted so it's not routed directly to the connector.
I've managed to get hold of another PCB and this seems to work so fault searching on these boards is put on hold for now (prioritizing to get the motor back in the car)