1999 Es300 What Is The Computer "89661-0W104-84" Doing?

[Camelot.King]

Hi

I send my 1999 ES300 to dealer for CEL/TRACOFF up(P1155 and P1135).

They told me that the root cause is the computer "89661-0w104-84". I need to replace it, $800+$300 labor.

Does any one know

(1) What's the function of this computer?

(2) Do I need to program it if I install a used one?

(3) What's the difference between this one and ECM?

Thanks in advance

[BoaR]

I'm at a loss. :(

http://www.lexuspartsnow.com/components/1999-lexus-es300~electronic-fuel-injection-system-84-04-2274.html

that lexus part seems to be refering to a fuel injection controller module. yet lower it shows it as part of a ECM... but... the haynes says thats the PCM going by the diagram placement matching the lexus one.

what the hell?? lol

btw, a search turned up a previous thread on the same codes and errors/problems.

http://us.lexusownersclub.com/forums/index.php?showtopic=24004

sorry i cant shed some more light on this. im drawing a blank.

[Camelot.King]

I'm at a loss. :(

http://www.lexuspartsnow.com/components/1999-lexus-es300~electronic-fuel-injection-system-84-04-2274.html

that lexus part seems to be refering to a fuel injection controller module. yet lower it shows it as part of a ECM... but... the haynes says thats the PCM going by the diagram placement matching the lexus one.

what the hell?? lol

btw, a search turned up a previous thread on the same codes and errors/problems.

http://us.lexusownersclub.com/forums/index.php?showtopic=24004

sorry i cant shed some more light on this. im drawing a blank.

Hi BoaR

Thanks a lot.

I have replaced the A/F sensor 3 times. I got both P1155 and P1135. First time, I used Bosch. It was not working. Then I replaced with Denso. It was not working. Last week, I bought the OEM part directly from Lexus dealer. The same thing happened.

I gave my car to dealer Wednesday. They spent 2 days and told me that they suspected the ECU has problem. However, it's not sure.