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2Wd Ecu In 4Wd Stagea

DaveB

By DaveB,
in Wagoneers

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DaveB Mentor

DaveB

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Hi all,

I can't get my consult interface to work and I suspect a dud ECU consult interface. It's a S2 RSFour. I have checked it has 12V ignition connection and a good earth, and RX & TX wire continuity from the pins on my consult interface to the pins on the board. I have tried two different consult interfaces which work in other cars. So it must be the ECU - argh.

I only have a 2WD ECU to swap in and test (both cars are auto though, and S2). Is anybody familiar enough with the ECU pinouts to know whether a 2WD ECU can be safely connected to a AWD ECU?

I suspect it will be OK, because from a quick inspection it appears as though the only connection to the ATTESA system appears to be "integrated control signal (multiple communication)" which sounds like data to me - hopefully disconnected in the 2WD ECU?

post-32445-0-30660000-1417705611_thumb.png

I have been going by a R34 ECU pinout. I don't know if it's different for stagea.

Anybody know if it will be safe to test the 2WD ECU in the 4WD car?

cheers

DaveB

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KiwiRS4T Grand Master

KiwiRS4T

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Should be fine Dave. Main differences are between manual and auto but in the Stagea there appears to be no difference between 2wd and awd. The only thing is traction control so depends where you got your 2wd ecu. It should definitely be perfectly safe to plug in and try.

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DaveB Mentor

DaveB

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Awesome, thanks Bob. Just tried it, I didn't start the car, but with ignition on the consult port worked. So looks like my issue is with my ECU.

For reference, car was a 99 RS auto (2WD).

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DaveB Mentor

DaveB

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Yeah, there are certainly more 2WD ones around for some reason. But I need a 4WD ECU to work with my 4WD tune file (also the car is 4WD of course). I might try a couple of overseas importers.

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DaveB Mentor

DaveB

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Yes, I wonder about that too. The R33 ECU definitely does - it's pin #56:

r33wiring.jpg

On the R34 system(s), I suspect it's pin 79 "ECM TCM, TCS/ABS integrated control signal [multiple communication]", which sounds like a data line. Matt from Nistune also told me there was programming in the ECU which was different for auto and 4WD. But that was a long time ago, with an older version of the type 4 boards.

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