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PR3

89-93 JDM B16A EF8/9

MCU = M66x301 58 and 93

Note: There are both OBD0 and OBD1 ECUs designated "PR3" and they are not in any shape or form compatible with each other.

This picture shows Auto/Manual selection on a OBD0 PR3:

scan

(thanks OBD1 Kenobi)

OBD1 PR3s are much more like the P28/P30 in terms of design and structure, and they use the same circuit board, usually a 02D01720-1500. They are a member of the OBD1 Civic Integra family.

This picture is of a 92-93 OBD1 JDM Integra RSi/XSi (B16A)

scan

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''|"

OBD0 PR3

Location Bytes Description Notes
31DE 1 Warm/high cam revlimit uses the OBD08 Bit Rev formula
31D8 1 Low cam revlimit uses the OBD08 Bit Rev formula
31E0 1 High cam restart uses the OBD08 Bit Rev formula
3414 1 VTEC disengage The ECU uses 3418 (Tested by Ben Ogle)
3415 1 VTEC engage The ECU uses 3419 (Tested by Ben Ogle)
3416 1 VTEC disengage The ECU uses 3418 (Tested by Ben Ogle)
3417 1 VTEC engage The ECU uses 3419 (Tested by Ben Ogle)
3418 1 VTEC disengage uses the OBD0 VTEC formula
3419 1 VTEC engage uses the OBD0 VTEC formula
341A 1 VTEC disengage The ECU uses 3418 (Tested by Ben Ogle)
341B 1 VTEC engage The ECU uses 3419 (Tested by Ben Ogle)
3BE6 255 Ignition map 1 uses the OBD0 Ignition formula
3CE5 255 Ignition map VTEC the first row is not used so its really a 15x16 map at 3CF4 But the extra row works good as filler
3DE4 255 Fuel map 1 uses the OBD0 Fuel formula
3EE3 15 Fuel multipliers 1 fuel Column Multipliers for fuel map 1
3EF2 255 Fuel map 2 uses the OBD0 Fuel formula
3FF1 15 Fuel multipliers 2 fuel Column Multipliers for fuel map 2

Attachment?: Modify: Size: Date: Who: Comment:
pr3-j01-1.JPG mod 750753 30 Mar 2004 - 02:19 eg6ajk  
pr3-j01-2.JPG mod 748024 30 Mar 2004 - 02:19 eg6ajk  
PR3-J01.JPG mod 766190 30 Mar 2004 - 02:21 eg6ajk  
pr3-j51bottom.jpg mod 1789469 27 Jul 2004 - 06:44 averageJoe pr3-j51 bottom.jpg
pr3-j51top.jpg mod 1612037 27 Jul 2004 - 06:49 averageJoe pr3-j51 top.jpg
pr3-j51ksbottom.jpg mod 629048 27 Jul 2004 - 06:50 averageJoe  
pr3-j51kstop.jpg mod 495819 27 Jul 2004 - 06:51 averageJoe  

Revision: r1.4 - 29 Jan 2005 - 07:10 GMT - noriega { Edit | Attach | History | More }
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