Honda OBD II diagnostic interface pinout and wiring @ pinoutsguide.com

obd 2 used in Honda cars produced after 1996's

Pin	Signal	Description

4	CGND	Chassis ground
5	SGND	Signal ground
6	CAN High	J-2284
7	K-LINE	(ISO 9141-2 and ISO/DIS 14230-4)
9	SCS	SCS (Service Check System) - diagnostic codes
12		Programming out
13 or 14?		Input/Output for VTM-4 and immobilizer control
14	CAN Low	J-2284 (WEN)
15	ISO 9141-2 L-LINE	(ISO 9141-2 and ISO/DIS 14230-4)
16	+12v	Battery power (unswitched)

OBD interfaces used:

1996 - 2006 : ISO 9141

2006 - 2008 : ISO 9141 or CAN

2008 and later : CAN

Some OBD-II cables schemes:

OBD-2 ISO 9141-2 (14230-4, KWP2000) simple serial cable
OBD-2 J1850 PWM, J1850 VPW serial ELM327 cable
OBD-2 universal ISO 15765-4 CAN, SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 and SAE J1939 diagnostic cable

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connector or cable wiring scheme

Honda OBD II diagnostic interface pinout

Some OBD-II cables schemes: