Knock Sensor Calibration, thresholds and noise filter

td-d · **Posted:** Wed Jul 18, 2012 6:26 pm

As referenced in another thread, I've been meaning to put this up for a while - it's all the various tables and parameters related to the knock sensor calibration, noise filtering, and thresholds, for AZ1G101N - although it's fairly straighforward to find all of these in most of the 32 bit roms, as many of the parameters are identical.

Firstly an acknowledgement, and then a warning - this is due to being able to reference the amazing work done by COBB on this, I'm assuming Bill (but yes, I had to dig around to find these, so nothing untoward). As a warning - this is about as experimental as it gets (and is also labeled as experimental by COBB) - I have worked through some of the logic behind these, but nowhere near the full set of subroutines.

I am going to post up the definitions first, and slowly try and put up the meaning of the various parameters (which may not be self evident) - it will take some time, as there are 27 in total.

Here goes:

Code:

   <scaling name="Knock" units="units" toexpr="x" frexpr="x" format="%.2f" min="0" max="255" inc="1" storagetype="float" endian="big"/>
   <scaling name="Knock2" units="units" toexpr="x" frexpr="x" format="%.0f" min="0" max="255" inc="1" storagetype="uint16" endian="big"/>
   <scaling name="Knock3" units="units" toexpr="x" frexpr="x" format="%.0f" min="0" max="255" inc="1" storagetype="uint8" endian="big"/>
   <scaling name="Knock4" units="units" toexpr="x*0.000015258789" frexpr="x/0.000015258789" format="%.4f" min="0" max="255" inc="1" storagetype="uint16" endian="big"/>

   <table name="Knock_Sensor_Calibration" category="Knock Sensor" address="cef18" type="2D" level="1" scaling="rawecuvalue">
      <table name="Volts" address="cee14" type="X Axis" elements="65" scaling="rawecuvalue"/>
   </table>

   <table name="Knock_threshold_filter_Final_Limit_Min" category="Knock Sensor" address="cf044" type="2D" level="1" scaling="Knock">
      <table name="Volts" address="cf01c" type="X Axis" elements="10" scaling="RPM"/>
   </table>

   <table name="Knock_threshold_filter_Final_Limit_Max_Cyl_1" category="Knock Sensor" address="cf094" type="2D" level="1" scaling="Knock">
      <table name="Volts" address="cf06c" type="X Axis" elements="10" scaling="RPM"/>
   </table>

   <table name="Knock_threshold_filter_Final_Limit_Max_Cyl_2" category="Knock Sensor" address="cf0e4" type="2D" level="1" scaling="Knock">
      <table name="Volts" address="cf0bc" type="X Axis" elements="10" scaling="RPM"/>
   </table>

   <table name="Knock_threshold_filter_Final_Limit_Max_Cyl_3" category="Knock Sensor" address="cf134" type="2D" level="1" scaling="Knock">
      <table name="Volts" address="cf10c" type="X Axis" elements="10" scaling="RPM"/>
   </table>

   <table name="Knock_threshold_filter_Final_Limit_Max_Cyl_4" category="Knock Sensor" address="cf184" type="2D" level="1" scaling="Knock">
      <table name="Volts" address="cf15c" type="X Axis" elements="10" scaling="RPM"/>
   </table>

   <table name="Knock_threshold_filter_Final_Limit_Min" category="Knock Sensor" address="cf044" type="2D" level="1" scaling="Knock">
      <table name="Volts" address="cf01c" type="X Axis" elements="10" scaling="RPM"/>
   </table>

   <table name="Knock_threshold_weight_factor_RPM_Load_Cyl_1" category="Knock Sensor" address="d0a60" type="3D" level="1" scaling="Knock">
      <table name="X" address="d0a10" type="X Axis" elements="18" scaling="RPM"/>
      <table name="Y" address="d0a58" type="Y Axis" elements="2" scaling="Knock"/>
   </table>

   <table name="Knock_threshold_weight_factor_RPM_Load_Cyl_2" category="Knock Sensor" address="d0b40" type="3D" level="1" scaling="Knock">
      <table name="X" address="d0af0" type="X Axis" elements="18" scaling="RPM"/>
      <table name="Y" address="d0b38" type="Y Axis" elements="2" scaling="Knock"/>
   </table>

   <table name="Knock_threshold_weight_factor_RPM_Load_Cyl_3" category="Knock Sensor" address="d0c20" type="3D" level="1" scaling="Knock">
      <table name="X" address="d0bd0" type="X Axis" elements="18" scaling="RPM"/>
      <table name="Y" address="d0c18" type="Y Axis" elements="2" scaling="Knock"/>
   </table>

   <table name="Knock_threshold_weight_factor_RPM_Load_Cyl_4" category="Knock Sensor" address="d0d00" type="3D" level="1" scaling="Knock">
      <table name="X" address="d0cb0" type="X Axis" elements="18" scaling="RPM"/>
      <table name="Y" address="d0cf8" type="Y Axis" elements="2" scaling="Knock"/>
   </table>

   <table name="Knock_threshold_filter_Background_Noise_interval_Weighting_Factor_Low_RPM_Delta" category="Knock Sensor" address="ceb7c" type="2D" level="1" scaling="Knock4">
      <table name="Volts" address="ceb60" type="X Axis" elements="7" scaling="RPM"/>
   </table>

   <table name="Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Imm" category="Knock Sensor" address="cdbc8" type="1D" level="1" scaling="Knock"/>

   <table name="Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Short" category="Knock Sensor" address="cdbcc" type="1D" level="1" scaling="Knock"/>

   <table name="Background_Noise_Delta_Weighting_Factor_Low_RPM_Delta" category="Knock Sensor" address="cdbd0" type="1D" level="1" scaling="Knock"/>

   <table name="Background_Noise_Base_Smoothing_Factor_High_Rpm_Delta" category="Knock Sensor" address="cdbd4" type="1D" level="1" scaling="Knock"/>

   <table name="Background_Noise_Delta_Weighting_Factor_High_RPM_Delta" category="Knock Sensor" address="cdbd8" type="1D" level="1" scaling="Knock"/>

   <table name="Background_Noise_Base_Smoothing_Factor_Low_Rpm_Delta" category="Knock Sensor" address="cdbdc" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short" category="Knock Sensor" address="cdbe0" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max" category="Knock Sensor" address="cdbe4" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio" category="Knock Sensor" address="cdbe8" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit" category="Knock Sensor" address="cdbec" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_Threshhold_Level_Final_Limit_Min" category="Knock Sensor" address="cdbf0" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_Threshhold_Level_Final_Limit_Max" category="Knock Sensor" address="cdbf4" type="1D" level="1" scaling="Knock"/>

   <table name="Filter_Noise_Level_Weighting_Factor" category="Knock Sensor" address="cdbfc" type="1D" level="1" scaling="Knock"/>

   <table name="Filter_Ref_Max_Range_Hysteresis_Corr_Knock_Sen_output_modify" category="Knock Sensor" address="cdb3d" type="1D" level="1" scaling="Knock3"/>

   <table name="Knock_Detection_Minimum_Engine_Run_Time" category="Knock Sensor" address="cdb74" type="1D" level="1" scaling="Knock2"/>

td-d · **Posted:** Wed Jul 18, 2012 6:26 pm

To find these in the rom:

The first, and easiest quick and dirty to find the actual knock sensor calibration table itself is to use Scoobyrom (once again, what an amazingly useful tool). The knock sensor calibration itself is easy to find - it is (by far) the largest 2d table in the rom (and all the roms I've looked at thus far confirm this) - 65 cells.

If you follow the references back to the data location for the sensor calibration, the offsets for the following are contained in this location:

Knock_threshold_filter_Final_Limit_Min
Knock_threshold_filter_Final_Limit_Max_Cyl_ 1 to 4 (an offset that references all 4 cylinders)
Knock_threshold_weight_factor_RPM_Load_Offset
Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit
Knock_threshold_filter_Final_Limit_Min

Most of the other parameters sit directly above the feedback correction range location, e.g. :

Code:

ROM:000CDBD8 Background_Noise_Delta_Weighting_Factor_High_RPM_Delta:.float 0.0625
ROM:000CDBD8                                         ; DATA XREF: sub_3C7F4+56o
ROM:000CDBD8                                         ; ROM:off_3C9B4o
ROM:000CDBDC Background_Noise_Base_Smoothing_Factor_Low_Rpm_Delta:.float 0.02
ROM:000CDBDC                                         ; DATA XREF: sub_3C7F4+4Ao
ROM:000CDBDC                                         ; ROM:off_3C9ACo
ROM:000CDBE0 Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short:.float 100.0
ROM:000CDBE0                                         ; DATA XREF: sub_3C7F4+80o
ROM:000CDBE0                                         ; ROM:off_3C9CCo
ROM:000CDBE4 Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max:.float 0.125
ROM:000CDBE4                                         ; DATA XREF: sub_3C7F4+BAo
ROM:000CDBE4                                         ; ROM:off_3C9E4o
ROM:000CDBE8 Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio:.float 150.0
ROM:000CDBE8                                         ; DATA XREF: sub_3C7F4+98o
ROM:000CDBE8                                         ; ROM:off_3C9D8o
ROM:000CDBEC Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit:.float 8.0
ROM:000CDBEC                                         ; DATA XREF: sub_3C20E+1BAo
ROM:000CDBEC                                         ; sub_3C20E:off_3C46Co
ROM:000CDBF0 Knock_Threshhold_Level_Final_Limit_Min:.float 50.0 ; DATA XREF: sub_3C20E+344o
ROM:000CDBF0                                         ; ROM:off_3C708o ...
ROM:000CDBF4 Knock_Threshhold_Level_Final_Limit_Max:.float 359.0
ROM:000CDBF4                                         ; DATA XREF: sub_3C20E:loc_3C55Eo
ROM:000CDBF4                                         ; ROM:off_3C70Co
ROM:000CDBF8 flt_CDBF8:      .float 1000.0           ; DATA XREF: sub_3C20E:loc_3C58Ao
ROM:000CDBF8                                         ; ROM:off_3C710o
ROM:000CDBFC Filter_Noise_Level_Weighting_Factor:.float 2.0 ; DATA XREF: sub_3C20E+390o
ROM:000CDBFC                                         ; ROM:off_3C714o
ROM:000CDC00 Timing_Comp_Maximum_RPM_Per_Cylinder:.float 7000.0 ; DATA XREF: sub_3CC14+1Ao
ROM:000CDC00                                         ; ROM:off_3CCE0o
ROM:000CDC04 Timing_Comp_Minimum_Load_Per_Cylinder:.float 0.0 ; DATA XREF: sub_3CC14+24o
ROM:000CDC04                                         ; ROM:off_3CCE4o
ROM:000CDC08 Timing_Comp_Minimum_Coolant_Temp_Per_Cylinder:.float 60.0
ROM:000CDC08                                         ; DATA XREF: sub_3CC14+2Co
ROM:000CDC08                                         ; ROM:off_3CCE8o
ROM:000CDC0C Feedback_Correction_Minimum_Load:.float 0.75 ; DATA XREF: sub_3E16Co
ROM:000CDC0C                                         ; ROM:off_3E20Co
ROM:000CDC10 flt_CDC10:      .float 0.79999995       ; DATA XREF: sub_3E16C:loc_3E17Co
ROM:000CDC10                                         ; ROM:off_3E214o
ROM:000CDC14 Feedback_Correction_Range_RPM:.float 1200.0

Following one of the Background_Noise_Delta_Weighting reference back to the data location will also lead you to the Knock_threshold_filter_Background_Noise_interval_Weighting_Factor_Low_RPM_Delta table.

Following the Background_Noise_Delta_Weighting reference back to the data location will also lead you to the Filter_Ref_Max_Range_Hysteresis_Corr_Knock_Sen_output_modify and Knock_Detection_Minimum_Engine_Run_Time parameters.

td-d · **Posted:** Wed Jul 18, 2012 6:26 pm

Reserved 2

Merp · **Joined:** Thu Jul 23, 2009 5:46 pm **Posts:** 863

Great work!!!

Sasha_A80 · **Posted:** Wed Jul 18, 2012 8:02 pm

My 2 cents:

ecu_ID:4242584106
Cal_ID:A8DH100F

58 cells sensor calibration:

ROM:00086DB0 flt_86DB0: .data.b 0, h'3A, 0, 0 ; DATA XREF: sub_AC34:off_B03Co
ROM:00086DB4 .data.l voltage_flt_CDF54
ROM:00086DB8 .data.l knock_level_flt_CE03C

RPM related:

ROM:00086DBC flt_86DBC: .data.b 0, h'A, 0, 0 ; DATA XREF: sub_AC34:off_B090o
ROM:00086DC0 .data.l RPM_flt_CE124
ROM:00086DC4 .data.l _8_10_flt_CE14C
ROM:00086DC8 _16_flt_86DC8: .data.b 0, h'A, 0, 0 ; DATA XREF: ROM:off_12178o
ROM:00086DCC .data.l rpm_flt_CE174
ROM:00086DD0 .data.l _16_flt_CE19C
ROM:00086DD4 flt_86DD4: .data.b 0, h'A, 0, 0 ; DATA XREF: ROM:0001217Co
ROM:00086DD8 .data.l rpm_flt_CE1C4
ROM:00086DDC .data.l _16_flt_CE1EC
ROM:00086DE0 flt_86DE0: .data.b 0, h'A, 0, 0 ; DATA XREF: ROM:00012180o
ROM:00086DE4 .data.l RPM_flt_CE214
ROM:00086DE8 .data.l _16_flt_CE23C
ROM:00086DEC flt_86DEC: .data.b 0, h'A, 0, 0 ; DATA XREF: ROM:00012184o
ROM:00086DF0 .data.l RPM_flt_CE264
ROM:00086DF4 .data.l _16_flt_CE28C
ROM:00086DF8 flt_86DF8: .data.b 0, h'F, 0, 0 ; DATA XREF: ROM:off_1232Co
ROM:00086DFC .data.l RPM_flt_CE2B4
ROM:00086E00 .data.l flt_CE2F0
ROM:00086E04 flt_86E04: .data.b 0, h'F, 0, 0 ; DATA XREF: ROM:00012330o
ROM:00086E08 .data.l RPM_flt_CE32C
ROM:00086E0C .data.l flt_CE368
ROM:00086E10 .data.b 0, h'F, 0, 0
ROM:00086E14 .data.l RPM_flt_CE3A4
ROM:00086E18 .data.l flt_CE3E0
ROM:00086E1C .data.b 0, h'F, 0, 0
ROM:00086E20 .data.l RPM_flt_CE41C
ROM:00086E24 .data.l flt_CE458

td-d · **Posted:** Thu Jul 19, 2012 11:14 am

Merp wrote:

Great work!!!

Thanks Merp, though I can't take credit for discovering this - but as they say, imitation is the best form of flattery!

I'm sure this will be quite useful in dealing with noisy built blocks that have had issues with false knock. I need to post up the descriptions of the various tables and parameters when I find some time...

td-d · **Posted:** Mon Jul 15, 2013 6:56 pm

Requested for AZ1G701V (2010 WRX):

Code:

Background_Noise_Base_Smoothing_Factor_High_Rpm_Delta                       CFBF4 
Background_Noise_Base_Smoothing_Factor_Low_Rpm_Delta                        CFBFC 
Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Imm   CFBE8 
Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Short CFBEC 
Background_Noise_Delta_Weighting_Factor_High_RPM_Delta                      CFBF8 
Background_Noise_Delta_Weighting_Factor_Low_RPM_Delta                       CFBF0 

Knock_Detection_Minimum_Engine_Run_Time                                                      CF8D2 
Knock_Sensor_Calibration                                                                     D0F4C 
Knock_Sensor_Calibration_Y_Axis                                                              D0E48 
Knock_Threshhold_Level_Final_Limit_Max                                                       CFC14 
Knock_Threshhold_Level_Final_Limit_Min                                                       CFC10 
Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit                               CFC0C 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max       CFC04 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio CFC08 
Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short                CFC00 
Knock_threshold_filter_Background_Noise_interval_Weighting_Factor_Low_RPM_Delta              D0910 
Knock_threshold_filter_Background_Noise_interval_Weighting_Factor_Low_RPM_Delta_Y_Axis       D08F4 
Knock_threshold_filter_Final_Limit_Max_Cyl_1                                                 D10C8 
Knock_threshold_filter_Final_Limit_Max_Cyl_1_Y_Axis                                          D10A0 
Knock_threshold_filter_Final_Limit_Max_Cyl_2                                                 D1118 
Knock_threshold_filter_Final_Limit_Max_Cyl_2_Y_Axis                                          D10F0 
Knock_threshold_filter_Final_Limit_Max_Cyl_3                                                 D1168 
Knock_threshold_filter_Final_Limit_Max_Cyl_3_Y_Axis                                          D1140 
Knock_threshold_filter_Final_Limit_Max_Cyl_4                                                 D11B8 
Knock_threshold_filter_Final_Limit_Max_Cyl_4_Y_Axis                                          D1190 
Knock_threshold_filter_Final_Limit_Min                                                       D1078 
Knock_threshold_filter_Final_Limit_Min_Y_Axis                                                D1050 
Knock_threshold_weight_factor_RPM_Load_Cyl_1                                                 D2874 
Knock_threshold_weight_factor_RPM_Load_Cyl_1_X_Axis                                          D2824 
Knock_threshold_weight_factor_RPM_Load_Cyl_1_Y_Axis                                          D286C 
Knock_threshold_weight_factor_RPM_Load_Cyl_2                                                 D2954 
Knock_threshold_weight_factor_RPM_Load_Cyl_2_X_Axis                                          D2904 
Knock_threshold_weight_factor_RPM_Load_Cyl_2_Y_Axis                                          D294C 
Knock_threshold_weight_factor_RPM_Load_Cyl_3                                                 D2A34 
Knock_threshold_weight_factor_RPM_Load_Cyl_3_X_Axis                                          D29E4 
Knock_threshold_weight_factor_RPM_Load_Cyl_3_Y_Axis                                          D2A2C 
Knock_threshold_weight_factor_RPM_Load_Cyl_4                                                 D2B14 
Knock_threshold_weight_factor_RPM_Load_Cyl_4_X_Axis                                          D2AC4 
Knock_threshold_weight_factor_RPM_Load_Cyl_4_Y_Axis                                          D2B0C 

marten · **Joined:** Fri Nov 14, 2008 10:08 am **Posts:** 23

I have tried to find tables and parameters on knock sensor calibration (AZ1G300F, JDM2008STI). I found a portion of them as below, but can not find others.
Could you please help to find other parameters and sanity check.

Thanks in advance.

Code:

00083EF0 Table_Knock_Sensor_Calibration:.data.w h'41 ; DATA XREF: sub_3657A+38o
00083EF0                                         ; sub_3657A:off_367B8o
00083EF2                 .data.w 0
00083EF4                 .data.l Knock_Sensor_Calibration_X_Axis
00083EF8                 .data.l Knock_Sensor_Calibration

00083EFC Table_Knock_Threshold_Filter_Final_Limit_Min:.data.w h'A
00083EFC                                         ; DATA XREF: sub_3657A+1C0o
00083EFC                                         ; sub_3657A:off_367DCo
00083EFE                 .data.w 0
00083F00                 .data.l dword_CFDA8
00083F04                 .data.l dword_CFDD0

00083F08 Table_Knock_Threshold_Filter_Final_Limit_Max_Cyl1:.data.w h'A
00083F08                                         ; DATA XREF: ROM:Knock_Threshold_Filter_Final_Limit_Maxo
00083F0A                 .data.w 0
00083F0C                 .data.l flt_CFDF8
00083F10                 .data.l flt_CFE20
00083F14 Table_Knock_Threshold_Filter_Final_Limit_Max_Cyl2:.data.w h'A
00083F14                                         ; DATA XREF: ROM:00054E54o
00083F16                 .data.w 0
00083F18                 .data.l dword_CFE48
00083F1C                 .data.l dword_CFE70
00083F20 Table_Knock_Threshold_Filter_Final_Limit_Max_Cyl3:.data.w h'A
00083F20                                         ; DATA XREF: ROM:00054E58o
00083F22                 .data.w 0
00083F24                 .data.l dword_CFE98
00083F28                 .data.l dword_CFEC0
00083F2C Table_Knock_Threshold_Filter_Final_Limit_Max_Cyl4:.data.w h'A
00083F2C                                         ; DATA XREF: ROM:00054E5Co
00083F2E                 .data.w 0
00083F30                 .data.l dword_CFEE8
00083F34                 .data.l flt_CFF10

000842EC Table_Knock_Threshold_Weight_Factor_RPM_Load_Cyl1:.data.w h'12
000842EC                                         ; DATA XREF: ROM:Knock_Threshold_Weight_Factor_RPM_Loado
000842EE                 .data.w 4
000842F0                 .data.l flt_D194C
000842F4                 .data.l flt_D1994
000842F8                 .data.l flt_D19A4
000842FC                 .data.l 0
00084300 Table_Knock_Threshold_Weight_Factor_RPM_Load_Cyl3:.data.w h'12
00084300                                         ; DATA XREF: ROM:00054E68o
00084302                 .data.w 4
00084304                 .data.l flt_D1AC4
00084308                 .data.l flt_D1B0C
0008430C                 .data.l flt_D1B1C
00084310                 .data.l 0
00084314 Table_Knock_Threshold_Weight_Factor_RPM_Load_Cyl2:.data.w h'12
00084314                                         ; DATA XREF: ROM:00054E64o
00084316                 .data.w 4
00084318                 .data.l flt_D1C3C
0008431C                 .data.l flt_D1C84
00084320                 .data.l flt_D1C94
00084324                 .data.l 0
00084328 Table_Knock_Threshold_Weight_Factor_RPM_Load_Cyl4:.data.w h'12
00084328                                         ; DATA XREF: ROM:00054E6Co
0008432A                 .data.w 4
0008432C                 .data.l flt_D1DB4
00084330                 .data.l flt_D1DFC
00084334                 .data.l flt_D1E0C
00084338                 .data.l 0

00083D70 Table_Knock_Threshold_Filter_Background_Niose_Interval_Weighting_Factor_Low_RPM_Delta:.data.w 7
00083D70                                         ; DATA XREF: sub_36B60+5Eo
00083D70                                         ; ROM:off_36D24o
00083D72                 .data.w h'800
00083D74                 .data.l flt_CF5F4
00083D78                 .data.l dword_CF610
00083D7C                 .data.l h'37800000, 0

000CE798 Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Imm:.float 80.0
000CE798                                         ; DATA XREF: sub_36B60+32o
000CE798                                         ; ROM:off_36D0Co
000CE79C Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Short:.float 100.0
000CE79C                                         ; DATA XREF: sub_36B60+3Co
000CE79C                                         ; ROM:off_36D10o

000CE7A0 Background_Noise_Delta_Weighting_Factor_Low_RPM_Delta:.float 0.25
000CE7A0                                         ; DATA XREF: sub_36B60:loc_36BB0o
000CE7A0                                         ; ROM:off_36D1Co
000CE7A4 Background_Noise_Base_Smoothing_Factor_High_Rpm_Delta:.float 0.0625
000CE7A4                                         ; DATA XREF: sub_36B60+44o
000CE7A4                                         ; ROM:off_36D14o
000CE7A8 Background_Noise_Delta_Weighting_Factor_High_RPM_Delta:.float 0.19999999
000CE7A8                                         ; DATA XREF: sub_36B60+56o
000CE7A8                                         ; ROM:off_36D20o
000CE7AC Background_Noise_Base_Smoothing_Factor_Low_RPM_Delta:.float 0.02
000CE7AC                                         ; DATA XREF: sub_36B60+4Ao
000CE7AC                                         ; ROM:off_36D18o

td-d · **Posted:** Thu Oct 10, 2013 11:02 am

marten wrote:

I have tried to find tables and parameters on knock sensor calibration (AZ1G300F, JDM2008STI). I found a portion of them as below, but can not find others.
Could you please help to find other parameters and sanity check.

Code:

Filter_Noise_Level_Weighting_Factor  CE7CC 

Knock_Threshhold_Level_Final_Limit_Max                                                        CE7C4 
Knock_Threshhold_Level_Final_Limit_Min                                                        CE7C0 
Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit                                CE7BC 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max        CE7B4 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio  CE7B8 
Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short                 CE7B0 

marten · **Joined:** Fri Nov 14, 2008 10:08 am **Posts:** 23

td-d wrote:

marten wrote:

I have tried to find tables and parameters on knock sensor calibration (AZ1G300F, JDM2008STI). I found a portion of them as below, but can not find others.
Could you please help to find other parameters and sanity check.

Code:

Filter_Noise_Level_Weighting_Factor  CE7CC 

Knock_Threshhold_Level_Final_Limit_Max                                                        CE7C4 
Knock_Threshhold_Level_Final_Limit_Min                                                        CE7C0 
Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit                                CE7BC 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max        CE7B4 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio  CE7B8 
Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short                 CE7B0 

Thanks td-d.
You always do great job!!

td-d · **Posted:** Fri Oct 11, 2013 12:10 pm

No problem.

Forgot to paste this one as well

ROM:000CE4A6 Knock_Detection_Minimum_Engine_Run_Time:.data.w h'FA

marten · **Joined:** Fri Nov 14, 2008 10:08 am **Posts:** 23

Hi, td-d.

I am suffering from odd knocking behavior at 6800-7200 rpm since I installed a stroker kit.

Car: JDM2008STI (EJ207 with dual AVCS)
Mods: HKS 2.12L stroker kit, HKS single-scroll header, HKS GT-2 turbine, HKS catted down pipe, TGV delete, ID 715cc Injector
Fuel: Japanese Premium (98RON?)

I got the FLKC or FBKC of -8~11 degrees at the range of 6800-7200 rpm (log #1). So, I pulled much timing of -3~6 degrees at that range, but I still get the FLKC or FBKC (log #2, #3). I doubt they are false knock because they are detected in spite of lowering timing and boost (log #4). Sometimes, I don't have the FBKC or FLKC under high timing and boost (#5). How do you think about them? If you think that they are false knock, Could you please help me to tune tables and parameters on the Knock sensor calibration ?

Thanks in advance.

td-d · **Posted:** Tue Oct 15, 2013 5:18 pm

Unfortunately, these are very new and untested - and I'm no tuner. I'll let some of the more experience tuners and mechanics on here take this one up.

dux10 · **Joined:** Tue Jun 05, 2012 7:37 pm **Posts:** 81

td-d, I'm having some issues with finding this on ROM A2WC510C : I have all values except for:

Code:

  <table name="Background_Noise_Base_Smoothing_Factor_Low_Rpm_Delta" category="Knock Sensor" address="CCD40" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short" category="Knock Sensor" address="CCD44" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max" category="Knock Sensor" address="CCD48" type="1D" level="1" scaling="Knock"/>CCD4C

   <table name="Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio" category="Knock Sensor" address="CCD4C" type="1D" level="1" scaling="Knock"/>CCD48

   <table name="Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit" category="Knock Sensor" address="CCD50" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_Threshhold_Level_Final_Limit_Min" category="Knock Sensor" address="CCD54" type="1D" level="1" scaling="Knock"/>

   <table name="Knock_Threshhold_Level_Final_Limit_Max" category="Knock Sensor" address="CCD58" type="1D" level="1" scaling="Knock"/>

   <table name="Filter_Noise_Level_Weighting_Factor" category="Knock Sensor" address="CCD60" type="1D" level="1" scaling="Knock"/>

AND

Knock_Detection_Minimum_Engine_Run_Time

These do not seem to be correct.

Thank you in advance!

td-d · **Posted:** Tue Oct 15, 2013 6:28 pm

The older roms may not have all of the parameters.

Code:

ROM:000CCD1C Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit:.float 8.0
ROM:000CCD1C                                         ; DATA XREF: sub_AEC0+2B8o
ROM:000CCD1C                                         ; sub_AEC0:off_B270o
ROM:000CCD20 Knock_Threshhold_Level_Final_Limit_Min:.float 84.0 ; DATA XREF: sub_AD58+2Co
ROM:000CCD20                                         ; ROM:off_AE48o ...
ROM:000CCD24 Knock_Threshhold_Level_Final_Limit_Max:.float 332.0
ROM:000CCD24                                         ; DATA XREF: sub_AEC0:loc_B328o
ROM:000CCD24                                         ; ROM:off_B3B4o
ROM:000CCD28 Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Imm:.float 80.0
ROM:000CCD28                                         ; DATA XREF: sub_375A8+2Eo
ROM:000CCD28                                         ; ROM:off_377C0o
ROM:000CCD2C Background_Noise_Delta_Smoothing_Weighting_Factor_RPM_Delta_Threshold_Short:.float 100.0
ROM:000CCD2C                                         ; DATA XREF: sub_375A8+38o
ROM:000CCD2C                                         ; ROM:off_377C4o
ROM:000CCD30 Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short:.float 100.0
ROM:000CCD30                                         ; DATA XREF: sub_375A8+70o
ROM:000CCD30                                         ; ROM:off_377F0o
ROM:000CCD34 Background_Noise_Base_Smoothing_Factor_High_Rpm_Delta:.float 0.25
ROM:000CCD34                                         ; DATA XREF: sub_375A8:loc_375EAo
ROM:000CCD34                                         ; ROM:off_377C8o
ROM:000CCD38 Background_Noise_Delta_Weighting_Factor_Low_RPM_Delta:.float 0.0625
ROM:000CCD38                                         ; DATA XREF: sub_375A8:loc_375F4o
ROM:000CCD38                                         ; ROM:off_377D0o
ROM:000CCD3C Background_Noise_Base_Smoothing_Factor_Low_Rpm_Delta:.float 0.0625
ROM:000CCD3C                                         ; DATA XREF: sub_375A8+44o
ROM:000CCD3C                                         ; ROM:off_377CCo
ROM:000CCD40 Background_Noise_Delta_Weighting_Factor_High_RPM_Delta:.float 0.030999999
ROM:000CCD40                                         ; DATA XREF: sub_375A8+52o
ROM:000CCD40                                         ; ROM:off_377D4o
ROM:000CCD44 Filter_Noise_Level_Weighting_Factor:.float 2.0 ; DATA XREF: sub_AEC0+480o
ROM:000CCD44                                         ; ROM:off_B3C0o
ROM:000CCD48 Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio:.float 150.0
ROM:000CCD48                                         ; DATA XREF: sub_375A8+84o
ROM:000CCD48                                         ; ROM:off_377FCo
ROM:000CCD4C Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max:.float 0.125
ROM:000CCD4C  

Knock_Sensor_Calibration                                                                     CD52C 
Knock_Sensor_Calibration_Y_Axis                                                              CD444 
Knock_Threshhold_Level_Final_Limit_Max                                                       CCD24 
Knock_Threshhold_Level_Final_Limit_Min                                                       CCD20 
Knock_threshhold_Filter_Final_Limit_max_modify_pre_final_limit                               CCD1C 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Limit_max       CCD4C 
Knock_threshhold_Filter_background_noise_interv_weight_factor_High_RPM_Delta_Rpm_delta_ratio CCD48 
Knock_threshhold_Filter_background_noise_interv_weight_factor_RPM_Delta_Short                CCD30 
Knock_threshold_filter_Background_Noise_interval_Weighting_Factor_Low_RPM_Delta              CCDD8 
Knock_threshold_filter_Background_Noise_interval_Weighting_Factor_Low_RPM_Delta_Y_Axis       CCDBC 
Knock_threshold_filter_Final_Limit_Max_Cyl_1                                                 CD638 
Knock_threshold_filter_Final_Limit_Max_Cyl_1_Y_Axis                                          CD614 
Knock_threshold_filter_Final_Limit_Max_Cyl_2                                                 CD680 
Knock_threshold_filter_Final_Limit_Max_Cyl_2_Y_Axis                                          CD65C 
Knock_threshold_filter_Final_Limit_Max_Cyl_3                                                 CD6C8 
Knock_threshold_filter_Final_Limit_Max_Cyl_3_Y_Axis                                          CD6A4 
Knock_threshold_filter_Final_Limit_Max_Cyl_4                                                 CD710 
Knock_threshold_filter_Final_Limit_Max_Cyl_4_Y_Axis                                          CD6EC 
Knock_threshold_filter_Final_Limit_Min                                                       CD38C 
Knock_threshold_filter_Final_Limit_Min_Y_Axis                                                CD364 

RomRaider

Knock Sensor Calibration, thresholds and noise filter

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