S3C owners: Help!!

[mentall]

Please could any of you tell me what ECU you have?
Mine's an 8BLB, but I think it (and the engine) has come from another vehicle: probably a Sierra.

And, if you have the information, which ECU pin on yours is connected to the battery (not the ignition switch) for the Keep-Alive-Memory?

Thanks, guys.

[chiefyo]

88BB 12A650 LB

[HvdWeerden]

8BLB and 88BB seems to be the same .

Picture of my spare ECU from a S3C

[mentall]

Thanks, guys: mine's just the same. I'm now happy I've got the right ECU (not so sure about the engine though).
My car seems to be a hybrid S3/S3C; the engine wiring harness is spliced to the TVR harness, but incorrectly. In particular, the keep-alive power terminal on the ECU is connected to the engine/fuel pump circuit through an ignition-switch controlled fuse. This means the ECU can't remember anything when switched off: sort of Groundhog Day effect!
I've hot-wired it from the radio connections for now, and the 015 diagnostic signal (KAM not working) has gone away. Let's see what happens next!

[HvdWeerden]

Would this link help : click

[mentall]

Thanks, Han: not directly applicable (it shows air-flow meters, no lambdas), but interesting, nevertheless. It shows the engine relays wired to a non-switched (permanent live) fuse, and there's no apparent keep-alive power to the ECU. Perhaps S3's don't need it, as they don't have adaptive control (because no lambdas).

The diagram I'm using is the last post in this thread: Clicky. I can print it, but can't link to it directly. The wiring and colours correspond almost perfectly to my car, but being an engine-only diagram it doesn't tell me where the keep-alive power comes from!

[Podie]

My old J reg S3c had a Ford Falcon ECU... before being remapped with a piggy-back ECU.

[Podie]

My old J reg S3c had a Ford Falcon ECU... before being remapped with a piggy-back ECU.

[mk1fan]

Can't help with the wiring but can photograph the ECUs in my S3C and my S3. If I get the chance I'll do it this week.

[mentall]

Many, many thanks.

If you have the time, the inclination and the kit, please could you check if there's battery voltage on Pin 1 of the S3C ECU, with the ignition off?

[Marc C]

Mentall, PM me your email address and I'll send you my ECU pinout list

It's not complete and possibly not 100% correct, it's just a list I made when checking the continuity of the engine bay wiring after finding a broken wire and deciding to check everything, but if your at the stage where you suspect your ECU, the wiring and even the engine ! then it might give you something to cross reference your findings against

[mentall]

PM sent, Marc. Please check, as there seems to be some doubt whether PM's are getting through.

[Marc C]

Nothing yet

[Marc C]

Check your inbox

[Marc C]

My ECU is 8BLB (88BB-12A650-LB) no idea if it's the original one or not

[mk1fan]

From my J plate 1991 S3




From my H plate 1991 S3C



HTH

Edited by mk1fan on Monday 7th September 23:10

[tivi92]

HvdWeerden said:

Would this link help : click

...that could help: EEC IV power running plan part A and B

clicky