well, i found the problem. no signal from the ecu terminal #24 it is the terminal that sends 12v to the main sfi relay when the key is turned to the on position. the main relay then closes and allows current to flow to the B+ terminals on the ecu, which in turn powers up everything else. i am going to take the computer back to the rebuilders because the lexus tech that i have been talking to says that it could still be the comp and that he has had to send back a few comps because they were not perfect. just to check everything out i jumped the relay terminals and the car started, and the check engine light is functioning. i drove it for about an hour. the comp. rebuilder really did fix the transmission circuts it feels like a different car. all the shift points are back, and overdrive really kicks in.
I know this is way old but am hoping you still look here occassionally... I live across the coast from you and would like to know where the computer rebuilder is?
My Sc300 Just Died
in 92 - 00 Lexus SC300 / SC400
Posted
I know this is way old but am hoping you still look here occassionally... I live across the coast from you and would like to know where the computer rebuilder is?
TIA