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''
|"
| 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 |
pr3-j01-1.JPG 
