FC507

which wires are the grounds for the ECU N322? Also which one is for the O2 sensor?
i have looked in the FSM, the ecu plug are different.

NZConvertible

I've already posted this diagram in one of your other threads. It shows the ECU ground wires.



The O2 sensor doesn't have a ground wire, it's grounded through the exhaust. Look at the wiring diagram on FSM page 50-25.

HAILERS

I'm curious. Is the N322 a dizzy engined car or a CAS car. Does it have a distributor or a CAS is what I'm asking. Isn't that a European ECU?

Do a search for N322 and you'll get several hits. Personally I know nothing about them. Sure it doen;t have plugs like NZ posted above?

NZConvertible

Oops, my bad. I thought you said N332, which is US-spec S4 TII. This appears to be a Euro-spec car. I've never seen anyone post any info on the Euro-spec EFI system. Typically the ground wires are the only black ones at the ECU, and you can confirm this by pulling out the plug and checking for continuity between the pin and the chassis. Euro-spec cars don't have O2 sensors.

Carzy Driver

Ok, I'm lost... is that pic that NZ posted for ECU 322 or 332?

NZConvertible

Those two pin layouts are from the 88 and 89 online FSM's, which are for US models.

N322 is Euro-spec S4 NA, N332 is US-spec S4 Turbo.

FC507

I am confused too. are you saying that on S4 NA (UK version) does not have O2 sensor in the ECU? Secondly, my N322 ECU lokks different to the diagram show above, the first two plugs are the same, but the third plug on the diagram is bigger than the one i have. I have searched by using N322, and there is a user whoc posted the N322 pic which is the same as the one i got but not the same as above, i really need to know the connections, otherwise i can not do any tapping into the ECU, please please help

NZConvertible

Yes your ECU is totally different. The whole EFI system was quite different in fact. No ignition control, far less emission controls, no O2 sensor, no 5V sensors and more. Like I said, I've never seen anyone post any info in any FC forum about this system.

You can't use an S-AFC with this ECU, if that's what you're trying to do. It won't work with a 12V AFM.

ΝΙΚΟΣ

I use this ecu.but my car is not na .i'm trying to remove the 12a distributor now and plug in the 2nd gen coils....and the electronic distributor cap...i thing i can make it work as i read that this ecu has not ignition control,right?