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P28

  • 92-95 OBD1 Civic Si/Ex and Del Sol(SOHC VTEC D16Z6)
  • 94-95 OBD1 Civic EX (SOCH VTEC D16Z9)

scan of auto ECU (back):

P28autoback.jpg

scan of auto ECU (top) (thanks turboef9):

P28autotop.jpg

scan of ECU modded by Erick's racing:

P28ericks.jpg

scan of manual ECU:

P28top.jpg

USDM/JDM (Thanks Katman):

P28USDM_JDM.jpg

P28-G00 (EDM)

  • top view:

p28_g00_oberseite.jpg

* bottom:

p28_g00_boden.jpg


See P28-G03 for OBD2 info. Used in EDM Del Sol 96-98.

Note: 304stock.bin is assumed for rom map

To add an address, click Edit below, find where your Hex Offset address is, and then add your new entry like so:

"|''location''|''length in bytes''|''description''|''notes''"

Thanks !

-=dave

RAM

Location Bytes Description Notes
00BB 1 MAP Sensor 0v-5v 0x00-0xFF
00C4 2 Current RPM OBD1_16bit RPM
00CC 1 VSS Sensor km/h
00D9 1 ECT Sensor  
00DA 1 O2 Sensor  
0210.3 1b Power Steering Pressure(PSP) switch input If pin B8 (PSP) is grounded, 0x0210.3 will read 1
0216.4 1b Vtec Enable Ram Flag Set if 60E6h is <> 00h
0227.4 1b Knock Enable Ram Flag Set if 60E7h is <> 00h

ROM:

Location Bytes Description Notes
0652 6 Injector Test Jump Routine #1/2 Change to "03 5F 06" to disable injector test - must apply both patches
1292 1 VTEC Coolant Temp Check (0x44 enables, 0xFF disables)
1580 6 Injector Test Jump Routine #2/2 Change to "03 9A 15" to disable injector test - must apply both patches
238A 6 O2 Heater Jump Routine Change to "03 C5 23" to disable O2 heater
2BAD 6 Checksum Jump Routine Change to "03 B6 2B" to disable (2BAD, no checksum for you ! ;)
445C 6 Vtec Solenoid Check Jump Routine Change to "03 7A 44" to disable VTS error only (tested by dohcvtec)
447D 6 Vtec Pressure Check Jump Routine Change to "03 95 44" to disable VTP error only - tested by Dave Blundell?
60E6 1 Vtec Enable 0xFF enables, Ox00 disables
60E7 1 Knock Sensor Enable 0xFF enables, Ox00 disables
60E9 1 Barometric Sensor Enable 0xFF enables, 0x00 disables, (need to verify ?)
60F2 1 ELD Sensor Enable 0xFF enables, 0x00 disables
60FA 1 Vtec VSS Check (0x00 enables, Ox FF? disables) More info: Disable Vtec VSSCheck P28
60FB 1 Debug Mode (0xFF enables, 0x00 disables)
6542 1 Vtec Crossover location 6543h seems like the only one to change crossover though
6543 1 Vtec Crossover formula seems to be OBD1_8bit Low Cam RPM
6544 1 Vtec Crossover location 6543h seems like the only one to change crossover though
6545 1 Vtec Crossover location 6543h seems like the only one to change crossover though
6546 1 Vtec Crossover location 6543h seems like the only one to change crossover though
6547 1 Vtec Crossover location 6543h seems like the only one to change crossover though
6548 1 Vtec Crossover location 6543h seems like the only one to change crossover though
6549 1 Vtec Crossover location 6543h seems like the only one to change crossover though
7000 10 Low Cam mBar Scale
700A 10 High Cam mBar Scale
7014 20 Low Cam Rpm Scale
7028 20 High Cam Rpm Scale
7050-7117 200 Low Cam Fuel Table Taken from Gimpy Accord?'s Spreadsheet
7118-7121 10 Low Cam Fuel Coeff Taken from Gimpy Accord?'s Spreadsheet
7122-71E9 200 High Cam Fuel Table Taken from Gimpy Accord?'s Spreadsheet
71EA-71F3 10 High Cam Fuel Coeff Taken from Gimpy Accord?'s Spreadsheet
72E4-73AB 200 Low Cam Timing Table Taken from Gimpy Accord?'s Spreadsheet
73AC-7473 200 High Cam Timing Table Taken from Gimpy Accord?'s Spreadsheet
7550-7617 200 Low Cam Target Lambda Table Anton
7618-76DF 200 High Cam Target Lambda Table Anton

Attachment?: Modify: Size: Date: Who: Comment:
p28_g00_oberseite.jpg mod 601585 14 Feb 2014 - 07:43 wurzel top view
p28_g00_boden.jpg mod 791620 14 Feb 2014 - 07:45 wurzel bottom

Revision: r1.10 - 14 Feb 2014 - 07:47 GMT - wurzel { Edit | Attach | History | More }
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