OBD2 pinout of GM, Ford, BMW, Honda, Nissan [Updated list]

What are the pins on OBD2?

OBD2 connectors have 16 pins, which are numbered as the image below.

The below is the general pinout of all vehicles that use the Onboard diagnostics 2 (OBD2) interface.

Pin 2, 4, 5, 6, 7, 10, 14, 15, 16 are standard across all 1996+ vehicles sold in the US

Pin 1, 3, 8, 9, 11, 12, 13 are manufacturer discretion, which means they are used for different purposes in different cars.

General OBD2 pinout

Pin	Pin Name	Description
1,3,8,9,11,12,13	Blank	Manufacturer discretion - different among cars
2	SAE J1850 Bus+	Commonly found on GM vehicles. This is the positive pin of the protocol.
10	SAE J1850 Bus-	Commonly found on GM vehicles. This is the positive pin of the protocol.
4,5	Ground	Chassis ground and Signal ground
6	CAN High	CAN ISO 15765-4 and SAE J2284 Used in 2008+ vehicles sold in the US CAN protocol uses 2 wires to communicate, this is CAN high (CANH) wire.
14	CAN Low	CAN ISO 15765-4 and SAE J2284 Used in 2008+ vehicles sold in the US CAN protocol uses 2 wires to communicate, this is CAN low (CANL) wire.
7	ISO 9141 – K Line	K-Line of ISO 9141-2 and ISO 14230-4 Common protocols for 2003+ vehicles and European vehicles between 2000 and 2004
15	ISO 9141 – L Line	L-Line of ISO 9141-2 and ISO 14230-4 Common protocols for European vehicles between 2000 and 2004
16	Battery+	Battery positive power

GM OBD2 pinout

The below tables are true with almost all modern GM vehicles (Chevrolet, GMC, Cadillac, Pontiac, Oldsmobile, Hummer, Saturn, Saab, etc.)

Pin	Pin name	Description
1	J1850	Second UART
2		J1850(+) VPW
3		Comfort
4	GND	Chassis ground
5	SGND	Signal Ground
6	HS-CAN	PCM
7	K-Line	K-Line of ISO 9141-2 and ISO 14230-4
8		CCM
9		first UART
10	PWM	n/c
11		EVA controller
12		ABS
13		SIR
14	HS-CAN(-)	E&C
15	L-Line	L-Line of ISO 9141-2 and ISO 14230-4
16	Battery+	Power sourse

From 2004, GM started to use another pinout – GM-LAN. The protocol was first applied to Saturn Ion and 2004 Cadillac XLR. And eventually, GM-LAN has been used on other GM vehicles.

Pin	Pin name	Description
1		SW-LS-CAN (33kB) or DW-FT-CAN (+) (<125kB)
2	J1850	N/A
3		MS-CAN (+) (95kB)
4	GND	Chassis ground
5	SGND	Signal Ground
6	HS-CAN	ISO 15765 HS-CAN (+) (500kB)
7	K-Line	N/A
8		N/A
9		DW-FT-CAN (-) (<125kB)
10	PWM	n/c
11		MS-CAN (-) (95kB)
12		K-Line (KW82 Prot.)
13		Reserved
14	HS-CAN(-)	ISO 15765 HS-CAN (-) (500kB)
15	L-Line	N/A
16	Battery+	Battery positive power

Ford OBD2 pinout

Pin	Pin name	Circuit	Description
2	J1850 Bus+ / SCP Bus	Bus 914 (TN/OG)	ABS and others or not used
3	Medium speed CAN+ or UBP bus	2180 (WH/BK) or 1906 (VT)	Low speed (125Kb) CAN bus. This bus used for some IC, RFA and other units.
4	CGND	57(BK)	Chassis ground
5	SGND	570(BK/WH)	Signal ground
6	CAN High	1827(WH/LB)	High Speed CAN+
7	K-LINE	70(LB/WH)	ISO Bus
10	J1850 Bus-	915(PK/LB)	SCP bus-
11	Medium speed CAN-	2181(BK/YE)	Low speed CAN-
13	PCM	107(P) / 107(VT)	Power Train Control / Module programming signal
14	CAN Low	1828 (PK/LG)	High Speed CAN-
16	+12v	40(LB/WH)	Battery power

BMW OBD2 pinout

Honda OBD2 pinout

Nissan OBD2 pinout