I think this might be right? I'll still want more help. How do we know if it is OBD or not? Especially if its had an Engine Swap.

Non OBD PR4 ECU
Molex Plug

A1 - Injector #1
A2 - Ground
A3 - Injector #2
A4 - Ground
A5 - Injector #3
A6 - Ground
A7 - Injector #4
A8 - None
A9 - None
A10 - Pressure Regulator cut-off solenoid valve
A11 - EACV
A12 - Main Relay
A13 - Main Relay
A14 - Main Relay
A15 - Main Relay
A16 - Ground
A17 - none
A18 - Ground
A19 - None
A20 - None
A21 - None
A22 - None
A23 - None
A24 - None
A25 - None
A26 - None
A27 - None

B1 - Ignition Switch
B2 - None
B3 - Clutch Relay
B4 - None
B5 - None
B6 - Check Engine Light
B7 - None
B8 - A/C Switch (ACS)
B9 - None
B10 - Crank Angel Sensor
B11 - None
B12 - Crank Angel Sensor
B13 - Ignition Switch
B14 - Alternator
B15 - Igniter
B16 - Speed Sensor
B17 - Igniter
B18 - None
B19 - P/S Oil Pressure Switch
B20 - Ignition Timing Adjusting Connector

C1 - Cylinder Sensor
C2 - Cylinder Sensor
C3 - TDC
C4 - TDC
C5 - Intake Air Temperature Sensor
C6 - TW Sensor
C7 - Throttle Posisitioning Sensor (TPS)
C8 - None
C9 - PA Sensor
C10 - Brake Switch
C11 - Map Sensor
C12 - Ignition Timing Adjusting Connector
C13 - Intake Air Temperature Sensor
C14 - MAP Sensor
C15 - MAP Sensor
C16 - None
C17 - None
C18 - None
C19 - None
C20 - None
C21 - None
C22 - None
C23 - None
C24 - None
C25 - None
C26 - None
C27 - None
C28 - None
C29 - None
D1 - None
D2 - None
D3 - None
D4 - None
D5 - None
D6 - None
D7 - None
D8 - None
D9 - None
D10 - None
D11 - None
D12 - None
D13 - None
D14 - None
D15 - None
D16 - None
D17 - None
D18 - None
D19 - None
D20 - None
D21 - None
D22 - None

 

Heres the pinouts for the PR4 OBD-1 ECU. Yet again how do we know wether its OBD equipped or not if its an engine swap?

Molex Plug

A1 - Injector #1
A2 - Injector #4
A3 - Injector #2
A4 - None
A5 - Injector #3
A6 - 02 Sensor Heat Controll
A7 - Fuel Pump Relay (FLR1)
A8 - Fuel Pump Relay (FLR2)
A9 - EACV
A10 - Pressure Regulator Solenoid Cut-off Valve
A11 - None
A12 - None
A13 - Check Engine Light (MIL)
A14 - None
A15 - A/C Clutch Relay
A16 - None
A17 - None
A18 - None
A19 - None
A20 - None
A21 - Igniter Power Source (IGP1)
A22 - Igniter Power Source (IGP2)
A23 - Power Ground (PG1)
A24 - Power Ground (PG2)
A25 - Main Relay IGP1 (IG Power)
A26 - Logic Ground (LG1)
A27 - None

B1 - Power Source (IGP2)
B2 - Logic Ground (LG2)
B3 - None
B4 - Service Check Sensor
B5 - A/C Switch (ACS)
B6 - None
B7 - None
B8 - P/S Oil Pressure Switch
B9 - Starter Switch Signal (STS)
B10 - Speed Sensor
B11 - CYL Sensor
B12 - CYL Sensor
B13 - TDC Sensor
B14 - TDC Sensor
B15 - Crank Angel Sensor
B16 - Crank Sensor
B17 - None
B18 - None
B19 - None
B20 - None

C1 - None
C2 - None
C3 - None
C4 - None
C5 - None
C6 - None
C7 - None
C8 - None
C9 - None
C10 - None
C11 - None
C12 - None
C13 - None
C14 - None
C15 - None
C16 - None
C17 - None
C18 - None
C19 - None
C20 - None
C21 - None
C22 - None
C23 - None
C24 - None
C25 - None
C26 - None
C27 - None
C28 - None
C29 - None

D1 - Back Up Fuse
D2 - Brake Switch
D3 - None
D4 - Service Check & Ignition Timing Connector (SCS)
D5 - None
D6 - None
D7 - Data Link Connector
D8 - None
D9 - Alternator
D10 - None
D11 - Throttle Posisitioning Sensor
D12 - None
D13 - TW Sensor
D14 - O2 Sensor
D15 - Intake Air Temperature Sensor
D16 - None
D17 - MAP Sensor (PB)
D18 - None
D19 - Sensor Voltage (VCC1)
D20 - Sensor Voltage (VCC2)
D21 - Sensor Ground (SG1)
D22 - Sensor Ground (SG2)

 

Well I got em on my own, aswell as a picture that shows the differences in the OBD's

Top to bottom

OBD II B
OBD II
OBD I
OBD 0

 

I had the same problem with my Type R when trying to install my Apex RSM....go to aempower.com and go into the programable engine management unit area....they will show you schematics for all ecus as well as what pin does what and how it's powered. Hope that helps...