| Pin | Signal | Description |
|---|---|---|
| 1 | GND | Ground |
| 4 | CGND | Chassis ground |
| 5 | SGND | Signal ground |
| 6 | CAN High | J-2284 |
| 7 | K-LINE | (ISO 9141-2 and ISO/DIS 14230-4) |
| 9 | SSM (Subaru Select Monitor) timing pulse | |
| 11 | SSM (Subaru Select Monitor) timing pulse | |
| 12 | SSM to ECM signal | |
| 13 | ECM to SSM signal | |
| 14 | CAN Low | J-2284 |
| 15 | ISO 9141-2 L-LINE | (ISO 9141-2 and ISO/DIS 14230-4) |
| 16 | +12v | Battery power |
Subaru OBD-2 compatibility list
| Model | Engine | Year (starting from) | OBD-2 Protocol |
|---|---|---|---|
| Subaru Forester | Gasoline (168 HP) | 1999 | |
| 2.0 turbo, Gasoline (177HP) | 2000 | ISO 9141 | |
| 2.0 Atmo, Gasoline (125HP) | 2001 | ISO 9141 | |
| Subaru Impreza | gx, Gasoline (125HP) | 2000 | ISO 9141 |
| 2.0 Turbo 16s, Gasoline (217HP) | 2001 | ISO 9141 | |
| 2.0 turbo, Gasoline (225HP) | 2001 | ISO 9141 | |
| 1.6, Gasoline (95HP) | 2002 | ISO 9141 | |
| 2.0 Turbo, Gasoline (265HP) | 2003 | ISO 9141 | |
| Subaru Impreza GD/GG | Gasoline (124 HP) | 2000 | ISO 9141-2 |
| Subaru Impreza GX | Gasoline (124 HP) | 2001 | ISO 14230-4, ISO 9141-2 |
| Subaru Impreza WRX | 2002 | ISO 14230-4, ISO 9141-2 | |
| Gasoline (222 HP) | 2003 | ISO 14230-4, ISO 9141-2 | |
| Gasoline (227 HP) | 2006 | ISO 14230-4, ISO 9141-2 | |
| Subaru Impreza WRX GD/GG | Gasoline (215 HP) | 2000 | |
| Subaru Legacy | 2.5 BE/BH, Gasoline (155 HP) | 2000 | ISO 9141-2 |
| 2.5i, Gasoline (165HP) | 2004 | KWP FAST | |
| 2, Gasoline or LPG (138HP) | 2005 | KWP FAST | |
| 2.0, Gasoline (163 HP) | 2007 | CAN | |
| 2.0 D, Diesel (150HP) | 2009 | CAN 11bit (500kb) | |
| 2.0 | 2001 | ISO 14230-4, ISO 9141-2 | |
| Subaru OUTBACK | Gasoline (155 HP) | 2000 | |
| 2.5i, Gasoline or LPG (165HP) | 2005 | KWP FAST | |
| 2.5l gpl, Gasoline or LPG (165HP) | 2006 | KWP FAST | |
| 3, Gasoline (245HP) | 2007 | CAN 11bit (500kb) | |
| Subaru Outback Wagon | 2002 | ISO 14230-4, ISO 9141-2 |
Obd protocols:
1996-2002 : ISO 9141
2003-2005 : ISO 9141 or KWP2000
after 2007 : CAN
There are no support for any OBD protocols in some european models produced before 2001.
USA and Canada 1996-1998(?1999) models Legacy/Outback:
OBD-2 style connector, but only SSM protocol allowed. Pin(s):
2;4 (ground)
12;13 (SSMECM communication)
14 (automatic transmission sense/comunication)
16 power

