Ecu Help

[CMY32]

Hello,

Does anyone know if the 4WD system in a GTS4/GTR is run through the standard ECU

or is there a seperate computer that runs this?

Thanks

[bozodos]

yeah there is, getting it to work with an aftermarket ECU is something I'd also like to find out

[CMY32]

great - thanks :-)

[funkymonkey]

there's an ATTESA computer that receives a signal from the ECU (readings from sensors like speed etc). Pinouts are different between RWD and AWD ECU's though.

[R31Nismoid]

Separate ECU

Located under the rear parcel shelf or passenger seat.

I can never remember which one is which... (HICAS vs 4WD)

[CMY32]

Thanks for the info, came to the right place

[paulr33]

for the 4wd and active LSD systems to pass diag at boot up (ie when key on) they need a working TPS signal

the signal for the TPS comes from the normal throttle sensor, but it runs to the main ECU

the main ECU then relays this TPS signal on another wire which is run to the boot

so for bozodos you either need your aftermarket ecu to relay this signal (pfft yeah right) or you splice the TPS wire and link the one from the TPS sensor to the one that runs to the 4wd / A-lSD computer in the boot

[bozodos]

Yeah I tried that once, but then I went by just a generic pinout for the R32 assuming that pinouts between RWD and 2WD are the same... then went from what I thought was the TPS input wire on the Microtech to the TPS out wire (well what im thinking is the TPS out wire) on the standard plug.