OBD-II (SAE J1962) 16-Pin Vehicle Diagnostic Port
Standardized 16-pin diagnostic link connector (DLC) mandatory on all passenger vehicles in the US and Europe. Provides access to automotive bus communication including ISO 11898 High-Speed CAN, ISO 9141 K-Line, SAE J1850 PWM/VPW, and permanent +12V battery power.
Aliase:OBD2, OBD-2, SAE J1962, ISO 15031-3, On-Board Diagnostics, Car Diagnostic Port, DLC
16-Pin Receptacle Front View
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | OEM_1 | Digital | Manufacturer Discretion (e.g. GM Single-Wire CAN / Switched Ignition) |
| 2 | BUS+ | Digital | SAE J1850 PWM / VPW Bus Positive (+) |
| 3 | OEM_3 | Digital | Manufacturer Discretion (e.g. Ford DCL(-) / Ethernet TX+) |
| 4 | CHASSIS_GND | Ground | Chassis Ground (Vehicle Body / Frame Ground) |
| 5 | SIGNAL_GND | Ground | Signal Ground (ECU Diagnostic Signal Common Ground) |
| 6 | CAN_H | Digital | ISO 11898-2 High-Speed CAN Bus High Line (500 kbps) |
| 7 | K_LINE | Digital | ISO 9141-2 / ISO 14230-4 (KWP2000) K-Line Diagnostic Line |
| 8 | OEM_8 | Digital | Manufacturer Discretion (e.g. Ignition Switch Detection / Second K-Line) |
| 9 | OEM_9 | Digital | Manufacturer Discretion (e.g. Engine Speed TD / ABS Signal) |
| 10 | BUS- | Digital | SAE J1850 PWM Bus Negative (-) |
| 11 | OEM_11 | Digital | Manufacturer Discretion (e.g. Ford DCL(+) / Ethernet TX-) |
| 12 | OEM_12 | Digital | Manufacturer Discretion (e.g. Ethernet RX+ / Programming Line) |
| 13 | OEM_13 | Digital | Manufacturer Discretion (e.g. Ethernet RX- / Timing Signal) |
| 14 | CAN_L | Digital | ISO 11898-2 High-Speed CAN Bus Low Line (500 kbps) |
| 15 | L_LINE | Digital | ISO 9141-2 / ISO 14230-4 L-Line Low-Speed Wakeup / Initialization |
| 16 | BATTERY_12V | Power | Unswitched Vehicle Battery Power (+12V / +24V, 4A max) |