Honda OBD 1 & 2 ECU Pinouts

OBD 1 and 2 Honda ECU Pinouts

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