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OBD 0

Pinout	'88 HF/Si	'90-1 DX (Std.)	'90-1 HF/Si	'89-92 EF8/9 SiR
A1	No.1 INJ	Aux INJ w/A3	No.1 INJ	No.1 INJ
A2	GRD w/A4 to Main Relay	GRD w/A4 to Main Relay	GRD w/A4 to Main Relay	GRD w/A4 to Main Relay
A3	No.2 INJ	Aux INJ w/A1	No.2 INJ	No.2 INJ
A4	GRD w/A2 to Main Relay	GRD w/A2 to Main Relay	GRD w/A2 to Main Relay	GRD w/A2 to Main Relay
A5	No.3 INJ	Main INJ w/A7	No.3 INJ	No.3 INJ
A6	Purge Cut-Off Solenoid Valve	Purge Cut-Off Solenoid Valve	Purge Cut-Off Solenoid Valve (HF Only)	Purge Cut-Off Solenoid Valve
A7	No.4 INJ	Main INJ w/A5	No.4 INJ	No.4 INJ
A8	Lock-up Control Solenoid Valve	Lock-up Control Solenoid Valve	Lock-up Control Solenoid Valve	Spool (VTEC) Solenoid Valve
A9	-	-	-	-
A10	-	EGR Valve (CA A/T Only)	EGR Valve (HF Only)	Pressure Regulator Cut-Off Solenoid Valve
A11	EACV w/A17	EACV w/A17	EACV w/A17	EACV
A12	Main Relay w/A14	Main Relay w/A14	Main Relay w/A14	Main Relay w/A14
A13	Main Relay w/A15	Main Relay w/A15	Main Relay w/A15	Main Relay w/A15
A14	Main Relay w/A12	Main Relay w/A12	Main Relay w/A12	Main Relay w/A12
A15	Main Relay w/A13	Main Relay w/A13	Main Relay w/A13	Main Relay w/A13
A16	GRD w/A18	GRD w/A18	GRD w/A18	GRD w/A18
A17	EACV w/A11	-	-	-
A18	GRD w/A16	GRD w/A16	GRD w/A16	GRD w/A16
B1	Hazard Fuse w/Brake Switch	Hazard Fuse w/Brake Switch	-	Hazard Fuse w/Brake Switch
B2	Tandem Valve Control Solenoid Valve	Tandem Valve Control Solenoid Valve	-	-
B3	A/C Clutch Relay	A/C Clutch Relay	Fast Idle Valve	A/C Clutch Relay
B4	Radiator Fan Relay	Radiator Fan Relay	Radiator Fan Relay	-
B5	Alternator	Alternator	Alternator	Oil Pressure Switch
B6	Check Engine Light	Check Engine Light	Check Engine Light	Check Engine Light(10A)
B7	Shift Position Sensor (A/T Only)	Shift Position Sensor (A/T Only)	A/C Switch w/B8	-
B8	A/C Switch	A/C Switch	A/C Switch w/B7	A/C Switch
B9	-	-	-	Brake Switch
B10	-	-	Crank Angle Sensor	Crank Angle Sensor
B11	Shift Position Sensor (AT Only)	Shift Position Sensor (AT Only)	Clutch Switch (HF Only)	Rear Defogger Switch
B12	-	-	Crank Angle Sensor	Crank Angle Sensor
B13	No.2 Fuse (10A)	No.2 Fuse (10A)	No.2 Fuse (10A)	No.2 Fuse (10A)
B14	Alternator	Alternator	Alternator	Alternator
B15	Igniter Unit w/B17	Igniter Unit w/B17	Igniter Unit w/B17	Igniter Unit w/B17
B16	Speed Sensor	Speed Sensor	Speed Sensor	Speed Sensor (Electrical)
B17	Igniter Unit w/B15	Igniter Unit w/B15	Igniter Unit w/B15	Igniter Unit w/B15
B18	-	-	-	-
B19	ELD	ELD	ELD	Knock Sensor
B20	Ign. Timing Adj. Connector	Ign. Timing Adj. Connector	Ign. Timing Adj. Connector	Ign. Timing Adj. Connector
C1	Crank Angle Sensor	Crank Angle Sensor	Cylinder Position Sensor	Cylinder Position Sensor
C2	Crank Angle Sensor	Crank Angle Sensor	Cylinder Position Sensor	Cylinder Position Sensor
C3	TDC Sensor	TDC Sensor	TDC Sensor	TDC Sensor
C4	TDC Sensor	TDC Sensor	TDC Sensor	TDC Sensor
C5	TA Sensor	TA Sensor	TA Sensor	TA Sensor
C6	TW Sensor	TW Sensor	TW Sensor	TW Sensor
C7	Throttle Angle Sensor	Throttle Angle Sensor	Throttle Angle Sensor	Throttle Angle Sensor
C8	-	EGR Valve Lift Sensor (CA A/T Only)	-	O2 Sensor B
C9	PA Sensor	PA Sensor	PA Sensor	P/S oil switch
C10	Brake Switch	Brake Switch	Brake and Reverse Light Switch (HF Only)	Brake Switch
C11	MAP Sensor	MAP Sensor	MAP Sensor	MAP Sensor
C12	PA Sensor	PA Sensor	Throttle Angle Sensor	Throttle Angle Sensor
C13	PA Sensor	PA Sensor	Throttle Angle Sensor	Throttle Angle Sensor
C14	MAP Sensor	MAP Sensor	MAP Sensor	MAP Sensor
C15	MAP Sensor	MAP Sensor	MAP Sensor	MAP Sensor
C16	O2 Sensor A	O2 Sensor A	O2 Sensor A	O2 Sensor A

pissedoffsol

OBD 1 and 2

OBD2a	OBD2b	Function	OBD1	Color	Notes
A01	B05	Injector 4	A02	Yellow
A02	B04	Injector 3	A05	Light Blue
A03	B03	Injector 2	A03	Red
A04	B11	Injector 1	A01	Brown
A05	A08	SO2H			No connection on OBD1
A06	C01	PO2H	A06	Orange/black
A08	B12	VTS	A04	Orange/White
A09	B20	LG1	A26	Black/Red
A10	B02	PG1	A23	Black
A11	B01	IGP1	A25	Yellow/Black
A12	B23	IACV	A09	Green/White
A15	A06	PCS	A20	Red
A16	A16	FLR	A07	Green/Yellow
A17	A17	ACC	A15	Black/Red
A18	A18	MIL	A13	Green/Orange
A19	A02	ALTC	A16	White/Yellow	No connection on D16Y8 P2Nb
A20	B13	ICM	A21	Red/Green
A22	B22	LG2	B02	Brown
A23	B10	PG2	A24	Black
A24	B09	ICP2	B01	Yellow Black
A27	A20	FANC	A12	Yellow/Green
C01	C31	CKFP			No connection on OBD1
C02	C08	CKPP	B15	Blue/Green
C03	C20	TDCP	B13	Orange/Blue
C04	C29	CYPP	B11	Orange
C05	A27	ACS	B05	Blue/Red
C06	A24	STS	B09	Blue/White
C07	A10	SCS	D04	Brown
C10	B21	VBU	D01	White/Blue
C11	C22	CKFM			No connection on OBD1
C12	C09	CKPM	B16	Blue/Yellow
C13	C21	TDCM	B14	White/Blue
C14	C30	CYPM	B12	White
C15	C10	VTM	D06	Orange/Green	Connected to VTS on OBD2a
C16	A26	PSW	B08	Brown/Red
C17	C05	ALTF	D09	Pink	No connection on D16Y8 P2Nb
C18	C23	VSS	B10	Yellow/Blue
D01	C27	TPS	D11	Pink/Black
D02	C26	ECT	D13	Red/White
D03	C17	MAP	D17	Pink/White
D04	C19	VCC1	D19	Yellow/Green
D05	A32	BKSM	D02	Greem/White
D06	C03	KS	D03	Red/Green	No connection on P08, P28
D07	C16	PO2S	D14	White
D08	C25	IAT	D15
D10	C28	VCC2	D20	Yellow/White
D11	C18	SG2	D22	Green/White
D12	C07	SG1	D21	Green/Blue
D14	A23	SO2S			No connection on OBD1
D16	A30	EL	D10	Green/Red	No connection on D16Y8 P2Nb

pissedoffsol

in case that link/pics die, i've attached them here.

Attached Images

	obd0.jpg (123.0 KB, 7252 views)
	obd1.jpg (156.0 KB, 6813 views)
	obd2a.jpg (277.3 KB, 4599 views)
	obd2b.jpg (319.0 KB, 3174 views)

pissedoffsol

OBD0 DPFI to MPFI Comparison Pinouts

DPFI			MPFI
Pin#	Wire Color	Function	Wire Color	Function
A1	Yellow 2	Aux Injector	Brown	#1 Injector
A2	Black 1	Main Relay/Ground	Black 1	Main Relay/Ground
A3	Yellow 1	Aux Injector	Red	#2 Injector
A4	Black 2	Main Relay/Ground	Black 2	Main Relay/Ground
A5	Red 2	Main Injector	Light Blue	#3 Injector
A6	Green	Purge Cut Off Solenoid Valve (Coil)	Green	Purge Cut Off Solenoid Valve (Coil)
A7	Red 1	Main Injector	Yellow 1	#4 Injector
A8	Yellow 3	Sedan LX A/T
A10	Red	EGR Solenoid Control Valve (Coil) (A/T only)
A11	Blue/Yellow	EACV (Coil)	Blue/Yellow	EACV (Coil)
A12	Green/Black 2	Main Relay	Green/Black 2	Main Relay
A13	Yellow/Black 2	Main Relay	Yellow/Black 2	Main Relay/Injector Resistor Box
A14	Green/Black 1	Main Relay	Green/Black 1	Main Relay
A15	Yellow/Black 1	Main Relay	Yellow/Black 1	Main Relay/Injector Resistor Box
A16	Brown/Black	Ground	Brown/Black	Ground
A17
A18	Black/Red	Ground	Black/Red	Ground
Pin#	Wire Color	Function	Wire Color	Function
B1	White/Green	Hazard Fuse	White/Green	Hazard Fuse
B2	Orange	Tandem Control Solenoid Valve	Blue 1	Fast Idle Control Solenoid Valve
B3	Yellow	A/C Clutch Relay	Yellow	A/C Clutch Relay
B4	Yellow/Green	Radiator Fan Relay	Yellow/Green	Radiator Fan Relay
B5	White/Yellow	Alternator	White/Yellow	Alternator
B6	Green/Orange	Check Engine Warning Light	Green/Orange	Check Engine Warning Light
B7	Green/Orange	A/T Shift Position Console Switch (Park, Neutral)
B8	Blue/Red	A/C Switch	Blue/Red	A/C Switch
B9
B10			Orange	Crank Angle Sensor
B11	Green/Black	A/T Shift Position Console Switch (Drive)
B12			White	Crank Angle Sensor
B13	Blue White	Main Relay	Blue White	Main Relay
B14	Blue 2	To Yellow, To Alternator	Blue 2	Alternator
B15	White 1	Ignitor Unit	White 1	Ignitor Unit
B16	Yellow/Red	Speed Sensor	Yellow/Red	Speed Sensor
B17	White 2	Ignitor Unit	White 2	Ignitor Unit
B18
B19	Green/Red	Electric Load Detector	Green/Red	Electric Load Detector
B20	Brown	Ignition Timing Adjusting Connector	Brown	Ignition Timing Adjusting Connector
Pin#	Wire Color	Function	Wire Color	Function
C1	Orange	Crank Angle Sensor	Blue/Green	Cylinder Position Sensor
C2	White 4	Crank Angle Sensor	Blue/Yellow	Cylinder Position Sensor
C3	Orange/Blue	TDC Sensor	Orange/Blue	TDC Sensor
C4	White/Blue	TDC Sensor	White/Blue	TDC Sensor
C5	Red/Yellow	TA Sensor	Red/Yellow	TA Sensor
C6	Red/White 1	TW Sensor	Red/White 1	TW Sensor
C7	Red/Blue	Throttle (Position) Angle Sensor (TPS)	Red/Blue	Throttle (Position) Angle Sensor (TPS)
C8	Yellow	EGR Lift Valve Sensor
C9	Red/White 2	PA Sensor	Red/White 2	PA Sensor
C10	Green/White 3	Brake Switch	Green/White 3	Brake Switch
C11	White 1	MAP Sensor	White 1	MAP Sensor
C12	Green/White 2	EGR Lift Valve Sensor/Pa Sensor/Ignition Timing Adjusting Connector/TA Sensor/TPS Sensor/TW Sensor	Green White 2	Pa Sensor/Ignition Timing Adjusting Connector/TA Sensor/TPS Sensor/TW Sensor
C13	Yellow/White	EGR Lift Valve Sensor/Pa Sensor/TPS Sensor	Yellow/White	Pa Sensor/TPS Sensor
C14	Green/White 1	MAP Sensor	Green/White 1	MAP Sensor
C15	Yellow/Red	MAP Sensor	Yellow/Red	MAP Sensor
C16	White 3	O2 Sensor	White 3	O2 Sensor

B

OBD 0 Wire Colors off HF/Si

A1- No 1 INJ Gold/Silver DOTS

A2- GRD w/A4 to main relay Black/silver DOTS

A3- No 2 Yellow/silver DOTS

A4- GRD w/A2 to main relay Black/silver DOTS

A5- NO 3 INJ Red/silver DOTS

A6- Purge cut off solenoid HF only Green/silver DOTS

A7- NO 4 INJ Red/silver DOTS

A8- Lock-up control solenoid valve/VTEC

A9 nothing

A10 EGR valve HF only Yellow/red

A11 EACV w/A17 Blue/yellow

A12 MAIN relay w/A14 Green/black

A13 MAIN relay w/A15 Yellow/black

A14 MAIN relay w/A12 Green/black

A15 MAIN relay w/A13 Yellow/black

A16 GRD w/A18 Brown/black

A17 Nothing or B18 IAB Solenoid

A18 GRD w/A18 Black/red

B1 Hazzard/Fuse/Brake switch/No HF

B2 Tandem Valve control Solenoid valve Orange/silver DOTS NO HF OR SIR

B3 FAST Idle valve or A/C Clutch Relay Yellow/Silver DOTS

B4 RADIATOR FAN RELAY Yellow/green NO SIR

B5 ALTERNATOR White/silver or on SIR OIL PRESSURE SWITCH

B6 CHECK ENGINE LIGHT Green/red

B7 Shift position sensor A/T only HF/SI A/C SWITCH w/B8 Green/silver DOTS NO SIR

B8 A/C SWITCH w/B7 Blue/silver DOTS NO SIR

B9 Nothing/COULD BE BRAKE SWITCH for SIR

B10 CRANK ANGLE SENSOR Blue/green

B11 CLUTCH SWITCH (HF ONLY) Green/black OR Rear defogger Switch on SIR

B12CRANK ANGLE SENSOR White/red

B13 NO2 FUSE 10A Blue/white

B14 ALTERNATOR Blue/silver DOTS

B15 IGNITER UNIT w/B17 White/silver DOTS

B16 SPEED SENSOR Yellow/red

B17 IGNITER UNIT w/B15 White/silver DOTS

B18 Nothing

B19 ELD or on SIR KNOCK SENSOR

B20 ING TIMING ADJ CONNECTOR Brown/red

C1 CYLINDER POSITION SENSOR Orange/silver DOTS

C2 CYLINDER POSITION SENSOR White/silver DOTS

C3 TDC SENSOR Orange/black

C4 TDC SENSOR White/blue

C5 TA SENSOR Red/orange

C6 TW SENSOR Red/white

C7 THROTTLE ANGLE SENSOR Red/blue

C8 SECOND O/2 SENSOR For B16A

C9 PA SENSOR Red/white or ON SIR P/S OIL SWITCH

C10 BRAKE AND REVERSE LIGHTS (HF ONLY) Green/white OR on SIR BRAKE SWITCH

C11 MAP SENSOR White/brown

C12 THROTTLE ANGLE SENSOR Green/white

C13 THROTTLE ANGLE SENSOR White/yellow

C14 MAP SENSOR Green/white

C15 MAP SENSOR Yellow/red

C16 #1 O/2 SENSOR White/silver DOTS