Hi guys I have a lexus ls400 with engine swap.

The story is I bought the car off a friend who did a reshell of the car into a newer shell it was completely swapped over because the 95 shell was rotten all the electrics work and the car cranks over unfortunately my friend has since passed away so I'm just going on details he has given me.

When I try start the car it cranks over but does not start and no engine management light is on and the alternator fuse keeps blowing when I change the fuse up to 30amp then it starts to smoke so immediately pulled it.

I brought the ECU to a guy who said he tried the capacitors but seems fine and resoldered the connections but still no eml light and keeps cranking when I'm plugged it back in.

I tried the ECU on another friends car a 1996 and it did the same thing but il try it again over the weekend and update the thread.

The ECU part number is 89661-50252
The car registration is DCZ 7216

I did some searching of this ECU but not much come up and wondering if any ECU from 95-96 will run the car or is it down to exact parts number

 

My old ECU was 89661-50251 (still working after recapped) and your 89661-50252 is newer version of it. Those series used in limited number of cars which seem to be European RHD (specificalyl UK) and JDM.
I bought 89661-50380 and it is running fine.