Toyota/Lexus OBD II diagnostic interface connector pinout and wiring @ pinoutsguide.com

used in most models after 1998

Pin	Signal	Description
2	J1850 Bus+
4	CGND	Chassis ground
5	SGND	Signal ground
6	CAN High	J-2284
7	K-LINE	(ISO 9141-2 and ISO/DIS 14230-4)
10	J1850 Bus-
13	TC	Timing check - ignition advance angle adjustment or ABS slow codes out
14	CAN Low	J-2284
15	ISO 9141-2 L-LINE	(ISO 9141-2 and ISO/DIS 14230-4)
16	+12v	Battery power

Protocols in use:

1996: J1850-VPW

1997-1999: J1850-VPW or ISO 9141

1999-2003: ISO 9141

2004-2006: ISO 9141 or CAN

2007 and later: TBD

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

Toyota/Lexus OBD II diagnostic interface connector pinout

Some OBD-II cables schemes: