ValueCAN OBD-II Cable (DB-9F to OBD-II)

Connector Pinouts and Signal Mapping

OBD-II Pin #	OBD-II Signal	DB-9F Signal	DB-9F Pin #
1	Discretionary*	N/C	N/C
2	SAE J1850 +	N/C	N/C
3	Discretionary* (MS CAN H)	CAN 2 H	8
4	Chassis Ground	Twisted Pair Shield	5
5	Signal Ground	GND	3
6	HS CAN H	CAN 1 H	7
7	ISO9141/K	N/C	N/C
8	Discretionary*	N/C	N/C
9	Discretionary*	N/C	N/C
10	SAE J1850 –	N/C	N/C
11	Discretionary* (MS CAN L)	CAN 2 L	4
12	Discretionary*	N/C	N/C
13	Discretionary*	N/C	N/C
14	HS CAN L	CAN 1 L	2
15	L line of ISO9141-2	N/C	N/C
16	Unswitched Vehicle Battery Positive	V+	9