PR3/ PWO ECU (pre-obd) pin out

‘A’ connector (White)

N/C A15 
Yel/Blk 
+12V 
Switched IGP1		 A13 
Yel/Blk 
+12V 
Switched IGP1		 A11 
Blu/Yel 
Air control value 
EACV (IAC)		 GAP A7 
Yel 
Injector
INJ4		 A5 
Lt Blu 
Injector
INJ3		 A3 
Red 
Injector
INJ2		 A1 
Brown 
Injector
INJ1
A18 
Blk/Red
GND
LG1		 A16 
Bro/Blk 
GND
LG1		 A14 
Grn/Blk 
Fuel pump
FLR		 A12 
Grn/Blk 
Fuel pump
FLR		 A10 
Green 
Purge valve
PCS		 A8 
Green 
VTEC Spool
VTS		 N/C A4 
Black 
GND
PG1		 A2 
Black 
GND
PG1


‘B’ connector

B19 
White 

Knock Sensor

 B17 
White 
Ignitor
ICM		 B15
White
Ignitor
ICM		 B13 
Blu/Wht
+12V at start
STS		 B11 
Black 
Rear 
Demister		 N/C N/C B5 
Blu/Blk 
VTEC pressure
VTP		 B3 
Yellow 
A/C  Clutch
ACC		 B1 
Wht/Grn 
+12V always
VBU
B20 
Brown 

Adjust timing

 N/C B16 
Yel/Red
Speed sensor
VSS		 B14 
Blue
Alternator
ALTC		 B12 
White 
Dist 
Crank-		 B10 
White 
Dist 
Crank+		 B8 
Blue/Red 
A/C switch
ACS		 B6 
Grn/Orge 
Check light
MIL		    


‘C’ connector

C15 
Yel/Red
MAP+
VCC1		 C13 
Yel/Whte 
TPS+ 
VCC2 		 C11 
White

MAP		 C9 
Red/Wht 
P/S
Pressure?		 C7 
Red/Blue

TPS		 C5 
Red/Yel 

Air Temp

 C3 
Orange/Blue 

Dist TDC+

 C1 
Blue/Grn 

Dist CYL+

C16 
White 

O2 #1

 C14 
Grn/Wht
MAP-
SG1		 C12 
Grn/Wht 
Sensor 
GND SG2		 C10 
Grn/Wht 

Brake Lt

 C8 
Red/Blue 

O2 #2

 C6 
Red/Wht 

Water T

 C4 
Wht/Blu 

Dist TDC-

 C2 
Blu/Yel 

Dist CYL-

 

pr3_a

A01 BRN INJ1 fuel injector control # 1
A02 BLK PG1 Ground
A03 RED INJ2 fuel injector control # 2
A04 BLK PG2 Ground
A05 LT BLU INJ3 fuel injector control # 3
A06 GRN purge cut-off solinoid valve
A07 YEL INJ4 fuel injector control # 4
A08 VTS VTEC solenoid
A09
A10 Pressure Regulator Cutoff Soleno
A11 BLU/YEL IACV from electronic air control valv
A12 GRN/BLK FLR1 fuel pump control
A13 YEL/BLK IGP1 power Input
A14 GRN/BLK FLR2 fuel pump control
A15 YEL/BLK IGP2 power Input
A16 BRN/BLK ground
A17
A18 BLK/RED ground
B01 WHT/GRN VBP Battery Backup
B02
B03 YEL ACC a/c compressor clutch relay cont
B04 FANC
B05 WHT/YEL VTM VTEC pressure switch
B06 GRN/ORN MIL check engine warning light
B07
B08 YEL/GRN ACS a/c on input
B09
B10 ORN CYP P crank sensor (1)
B11 Fuse Box
B12 WHT ? CYP M crank sensor (2)
B13 BLU/WHT starting input
B14 BLU ALT alternator output signal
B15 WHT ? ignition output signal
B16 YEL/RED VSS VSS
B17 WHT ? ignition output signal
B18
B19 KS Knock sensor
B20 BRN SCS ignition timing adjusting connec
C01 BLU/GRN CKP P CYL sensor (1)
C02 BLU/YEL CKP M CYL sensor (2)
C03 ORN/BLU TDC P TDC sensor (1)
C04 WHT/BLU TDC M TDC sensor (2)
C05 RED/YEL IAT intake air temperature sensor
C06 RED/WHT ? ECT coolant temperature sensor
C07 RED/BLU TPS throttle angle sensor
C08 O2S Dual O2 Sensor (JDM)
C09 RED/WHT ? PA atomosphere pressure sensor inpu
C10 GRN/WHT ? BKSW brake light switch
C11 GRN/WHT ? MIL ground
C12 GRN/WHT ? SG2 TPS GND
C13 YEL/WHT VCC1 TPS 5V
C14 SG1 MAP GND
C15 YEL/RED VCC2 MAP 5V
C16 WHT O2S oxygen sensor