Thread: BCU, ECU & TCU for 4.6 from USA

Originally Posted by ozscott

Dont forget though Evo the 4.5 odd litre straight 6 in the 100 series had to less cylinders and about another 600kg being hauled around all the time and in the real world the 6 and the 8 in the 100 series cruiser used a LOT more fuel than a D2 V8.

Cheers

i'm not overly knowledgeable in the cruisers i'm afraid.

Originally Posted by Eevo

i'm not overly knowledgeable in the cruisers i'm afraid.

You say that like it's a bad thing

Cheers

Originally Posted by ozscott

You say that like it's a bad thing

Cheers

hard to pay them out

At the time LR was building there was I think, a fairly hefty tax penalty for motors over 2.5-3L in the UK and Europe ? Which dictated the market they wanted the most from. The good thing that came of it was some very nice small motors with a reasonable power to displacement ratio.

After a few days of driving I've got loads of codes and always in open loop. Turns out the ECU is from a 03 D2 with SAI. Apparently there is workaround which involves building a secondary air pump simulator to trick the ECU into thinking the pump is there and working.

Might have to go that route if I can't find (struggling to!) a non SAI ECU from the USA.

Try a simple trick, see RAVE - Electrical library - Connector views - C0636 pin 16(black/orange wire in the middle plug of the ECU) , splice into this wire with a relay's coil as the other terminal to be connected to an ignition live

i checked the diagram and from pure electronic point of view this is missing for the NAS ECU cos it monitors the SAI pump's relay coil as it manages it through the earth path, the pump itself gets feed through the relay's contact and direct earth so the ECU can't monitor it other way than through the relay's coil.

i know too little about how the V8 engine works but from electronic management point of view this is the conclusion

Thanks Sierrafery, I'm going try that tomorrow.

I really hope this works because I put the 4.0 ECU back in this afternoon and it's a completely different truck.

Cheers

Originally Posted by sierrafery

Try a simple trick, see RAVE - Electrical library - Connector views - C0636 pin 16(black/orange wire in the middle plug of the ECU) , splice into this wire with a relay's coil as the other terminal to be connected to an ignition live

i checked the diagram and from pure electronic point of view this is missing for the NAS ECU cos it monitors the SAI pump's relay coil as it manages it through the earth path, the pump itself gets feed through the relay's contact and direct earth so the ECU can't monitor it other way than through the relay's coil.

i know too little about how the V8 engine works but from electronic management point of view this is the conclusion

So is the slice wire from the ECU the output and the ignition live wire the input?