J Spec TT6 Pre facelift ECU differences

[Samurai 20V]

Hi chaps..

 

Need some info..

 

EPC for the J spec TT6 lists two ecu's for a pre facelift non-VVTi.

 

89661 COMPUTER, ENGINE CONTROL

89661-14501 (10/1993 - 04/1996)

89661-14770 (05/1996 - 08/1997)

 

Does anybody know if they are interchangeable?

 

I have both, my car is a 1994 so stock is 89661-14501.

 

The 89661-14770 has the same connector but when I connected it to my car it throws an 02 sensor error, car runs lean on idle. On boost it drives fine.

 

Any info will be helpful.

 

Thanks.

[Samurai 20V]

Guys,

 

It seems the (05/1996 - 08/1997) ECU is OBDII...

 

The Yanks on Supraforums swap them over with some mods to get rid of the lean spot on the changeover..

 

Can anyone confirm this?

[mr_maj]

Hi mate did you find out the differences between the 2 ecus?

 

Im looking for the one ending 14770 and have been offered a 14501

 

This is for a facelift model so ideally I need the 14770

[Samurai 20V]

Hi mate did you find out the differences between the 2 ecus?

 

Im looking for the one ending 14770 and have been offered a 14501

 

This is for a facelift model so ideally I need the 14770

 

Hey mate..

 

I found the circuit diagrams, they seem the same..

 

I guess the mapping is different..

 

My car takes the 14501, I have a Mines 14770, its working fine, with the exception of the O2 sensor heater circuit error it always it had..

 

If its cheap enough, it may be worth a shot.