BMW OBD-II diagnostic interface pinout

connector or cable wiring scheme

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16 pin J1962 OBD-2 car custom connector layout

16 pin J1962 OBD-2 car custom connector
at the BMW car

Pin	Signal	Description
1	+12V	Power
4	CGND	Chassis ground
5	SGND	Signal ground

7	ISO 9141-2 K-LINE	engine (ISO-9141 and ISO-14230), automatic transmission diagnostic (in some models)
8	ISO 9141-2 K-LINE	IKE/KOMBI, ABS, ABS/ASR, ABS/ABD, ESP, DSC, Airbag and other electronic equipment
9	TD/RPM	Engine rotation speed
16	+12v	Battery power

ISO 9141-2 used in BMW 3-Serie, 5-Serie, X5, Z3, Z4, Z8, 740i, 740iL, 750iL.

KWP2000 used in BMW 5-Serie; Generation (E60), BMW 745i, 745Li, 765Li.

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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