Tactrix EcuFlash Info for BRZ 86 FRS Rom flash update and logging

[teratakm]

Hello, I'm trying to flash OFT stage2 on my 2019 JDM BRZ AT with CALID : ZA1JU00B00G. Any substitute ROM available?

[Compelica]

Originally Posted by teratakm

Hello, I'm trying to flash OFT stage2 on my 2019 JDM BRZ AT with CALID : ZA1JU00B00G. Any substitute ROM available?

Use ZA1JK01I.

Or if you need help you can PM me - where are you located? Am located in MY as well.

[callisto]

A kind user on another forum sent me their stock ZA1JN00J for the archives:

ZA1JN00J AM6 H4NA KS MT (2017) BSW_12CYH4N_DI_MC5 Ver 1.00r1

[callisto]

Originally Posted by Td-d

As requested by Steve, dump of the ZA1JD00G ram addresses

E_Final_Fueling_Base_2byteExt_E124                     FFF89E38 
E_Final_Fueling_Base_4byteExt_E123                     FFF8A2C8

Thanks to this post over a decade ago and about three years of tracing the closed-loop fueling system, I have finally pinned down the logcfg addresses for Final Fueling Base AFR as requested by the Mafscaling tool's volumetric map feature (VECalc): 0xFFF89F84 / 0xFFF8A364 / 0xFFF8A090 for A01G / K00G / V00C in that order. It's an AFR parameter (also known as "Commanded Fuel Final"), so it needs to be multiplied by 14.7 as usual — but, most notably, as it's derived from the non-BRZ Injector Flow Scaling value, it is not used under normal healthy operation; use Commanded AFR (and Injector Flow Scaling BRZ) instead.

paramname = Final_Fueling_Base
paramid = 0xfff8a090 ; V00C
isfloat = 1
scalingrpn = x,14.7,*

Commanded AFR is the correct parameter to use, but I've wanted to track this down for quite some time and prove that, so this checks off an item on my list: I now have identified every logging parameter used by all the various tabs in mafscaling, and as a bonus can now directly log observed Volumetric Efficiency (VE) without custom-patching the ECU (and see all those lovely erroneous values at low airflow speeds that the forum encountered in A01C!).

; volumetric efficiency from VGE mafscaling WOT Best VVT tab
; variant: IAT celsius (no scalingrpn), MAP kilopascals (scalingrpn=x,0.133322368,*)
type = calc
paramname = VE
scalingrpn = MAF,MAP,1000,*,IAT,273.15,+,287.05,*,/,1000,*,/,121.9254,RPM,*,3456,/,0.0283,*,60,/,/,100,*

For the especially curious, in the process of figuring this out I also tracked down the difference between Injector Flow Scaling and Injector Flow Scaling BRZ. The BRZ-specific path requires RPM >500, ECT <110°C, and — while I'm not sure yet — I suspect it's also checking DI fuel rail pressure. Duly noted, since the car apparently can use the other scaling value; though I expect it doesn't matter under normal operation, perhaps it's useful to know.

  fVar1 = (ENGINE_final_fueling_base - ENGINE_dipi_ect_ratio) - FLOAT_fff8aaf8;
  if (BOOL_fff8a16e) {
    /* BRZ path, uses Injector_Flow_Scaling_BRZ=263.1 */
    _port_ipw = ENGINE_fueling_port * 263.1;
    _direct_ipw = (ENGINE_fueling_direct +
                  ENGINE_Low_Pulse_Width_Fuel_Injector_Comp * ENGINE_low_fueling_comp *
                  ENGINE_fueling_port) * 263.1;
    _ipwA = (CALC_fueling_cylA_a100 + CALC_fueling_per_cyl_a0e0[0]) * 263.1;
    _ipwB = (CALC_fueling_cylB_a104 + CALC_fueling_per_cyl_a0e0[1]) * 263.1;
    _ipwC = (CALC_fueling_cylC_a108 + CALC_fueling_per_cyl_a0e0[2]) * 263.1;
    _ipwD = (CALC_fueling_cylD_a10c + CALC_fueling_per_cyl_a0e0[3]) * 263.1;
    fVar1 = fVar1 * ENGINE_load_multiplied;
    fVar1 = ((1.0 - ENGINE_fueling_port_ratio_a12c) * fVar1 +
            ENGINE_Low_Pulse_Width_Fuel_Injector_Comp * ENGINE_low_fueling_comp *
            ENGINE_fueling_port_ratio_a12c * fVar1) * 263.1;
  }
  else {
    /* non-BRZ path, so to speak. */
    /* ENGINE_final_fueling_total = Injector_Flow_Scaling=12176.6 * [long messy codepath]; */
    _total_ipw = (ENGINE_stft_raw + ENGINE_ltft_raw + ENGINE_fueling_adj_ab88) *
                 ENGINE_final_fueling_total;
    _port_ipw = _total_ipw * ENGINE_final_fueling_base;
    _direct_ipw = (ENGINE_low_fueling_comp * _port_ipw + 0.0) *
                  ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
    _ipw_base = ENGINE_low_fueling_comp * _total_ipw;
    _ipwA = (ENGINE_ipw_A * CALC_DiPi_Fueling_clftu_iarlael_cylA * _ipw_base + 0.0) *
            ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
    _ipwB = (ENGINE_ipw_B * CALC_DiPi_Fueling_clftu_iarlael_cylB * _ipw_base + 0.0) *
            ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
    _ipwC = (ENGINE_ipw_C * CALC_DiPi_Fueling_clftu_iarlael_cylC * _ipw_base + 0.0) *
            ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
    _ipwD = (ENGINE_ipw_D * CALC_DiPi_Fueling_clftu_iarlael_cylD * _ipw_base + 0.0) *
            ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
    fVar1 = (fVar1 * ENGINE_final_fueling_total * ENGINE_low_fueling_comp + 0.0) *
            ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
  }
  _port_ipw_with_low = _port_ipw * ENGINE_Low_Pulse_Width_Fuel_Injector_Comp;
  upper_bound = 262136.0;