Quick Attessa Question.

[GTR 94]

ok guys so just had an Autronic SM4 fitted in my 32 GTR and have found 4wd light is on and always in RWD mode, (dont get me wrong this is fun but not why i wanted a GTR)

so i have checked the attessa computer and i am getting 21 flashes which if im correct is the throttle sensor or circuit.

Can anyone tell me if this is a mechanical fix problem or is it somthing in the autronic??

thanks you Lee

[blind_elk]

I had the same drama when I fitted a Wolf to my GTS4. The (factory) ECU passes a throttle signal through to the ATTESSA computer.

Advanced Engine Management (makers of Wolf) have a "black box" solution. Maybe Autronic has something similar.

[RBeed]

ok thanks blind elk, umm surely some one on here runs a sm4 on there GTR and can tell me if they have had a similar problem, please?

cheers

[T04GTR]

YES, you just need to relay the tps input to the atessa ecu. standard loom diagram will sho all simple as splicing it in no extra boxes or shit needed.

[giant]

^ yep

[dundersmurfen]

hey guys

ets: 4wd control unit right?

ems: engine management/control system?

ok ok im unsure about all the uhm, technical terms but hope you get it anyways...

Have installed a new ems in a friends r32gtr. Engine runs fine but we havent worked out all details in the atessa vs ems. Vill splice the tps signal(?) back to the ets, but what about the rpm signals that schematics show goes from ems to ets? Are they relevant for getting 4wd working or just tells ets that engine is running and 4wd can be engaged. Problem with this is dont know what sort of signal the ets wants when recognizing engine rpm, or maybe a positive 5v feed is enough to just say, hey engine running... with a rpm based signal it gets more tricky since we dont know what frequency it likes to listen to...

well just some of my projects right now trying to get this r32 sliding in the snow here with all 4 wheels spinning like crazy...

later on my r33 gtr will get the same treatment, would that be about the same as this? (4wd stuff vs new ems)

so i will try to get back with some info on this later...

[dundersmurfen]

ok so this works fine. just plug in tps signal to ets and its back in 4wd!

(might need a grounding wire also shown in eccs section in manual)

might need a slight recalibration on tps to get it just right... (adjust tps unit postition on throttle bracket)

dont know if i missed something, but rpm signal to ets seems to have no effect on anything important... guess ill just skip it for now.

Edited February 22, 2009 by dundersmurfen

[bozodos]

sounds like the same problem as what I mentioned in the Microtech + GTS-4 thread.. so dundersmurfen you just hooked up the TPS signal wire from your aftermarket ECU to the TPS out wire on the original loom and it worked fine?

[dundersmurfen]

it works, but not perfect. seems like the ets unit draws some current... calibrating tps in ecu gets a bit tricky... working on it, if i find a solution ill put up some info here...