4A-GE smallport ECU wiring

[stahlz_ae86]

Hi all, just in the process of tidying up a loom for a smallport conversion into KE70.

There's 3 slots on the ECU, a large 26p, medium 16p, and a small 12p.

Now I have the 26 and 16, but went to the wreckers thisarvo to raid the toyota's for the right plug to go in the 12p slot. I pulled the ECU out of a 93 widebody V6 Camry and took 3 of the 4 plugs from that, a 26, 16 and a 12. Problem still lies in the fact i have not got the correct 12p plug as the spacing of the pins is wider on the smallport ECU than that of the Camry.

Does someone know what model Toyota I would be able to raid next for the correct plug to use in that slot? There's obviously no SX Corolla's at pick-a-part so I'd like to find it on a more common model.

[stahlz_ae86]

For the record the 16p and 26p plugs from the V6 Camry ECU fit the smallport 4A-GE ECU. V6 Camry 1993-1996.

[Golberg]

Umm, look at a late 3S-FE camry (SV21) early ones definitely don't have the correct plug (they're the same a big port ECU's), but I'm pretty sure 89-90 should have all the same plugs as a smallport ECU.

[stahlz_ae86]

Cheers, going to the other wreckers thismorning to sus it out, I'll let you know how i went.

[stahlz_ae86]

Got the correct wider pinned 12p plug thismorning. It came from a Dec '93 widebody camry sedan with 5S-FE. The Nov '93 widebody Camry wagon I checked had a different computer again, so i don't know if all pre November 93 ecu's have all got different ecu pinouts to all Dec 93 onward ones but that would be my guess.

All SV21 Camry's I looked at seem to have the yellow plugs which I think may be the same as bigport 16V 4A-GE. From memory the 3 plugs had the same amount of pins so i guess anyone who needs that gear for a bigport conversion can keep that in mind when they get to that stage.

The Dec '93 widebody Camry I pulled the 12p from also had the same 16p and 26p so if you need a full set of ECU plugs that's the model I suggest people to look for if they need a complete set of 3 plugs to do a smallport 16V ECU install.

Hope this info can help others in the future.

[Golberg]

Yeah the earlier SV21's have all the same plugs as the bigport ECU. I was almost certain the later ones had the newer plugs. I'm sure that some sort of car with a 3S-FE has them at least.