Does My Car Have OBD-II?
Posted by Alex (Im) E. on 31 January 2013 11:26 PM
Fastest way to find out, is to check here.
Two factors will show if your vehicle is definitely OBD-II equipped:
Pin 2 - J1850 Bus+
Where Is the Connector Located?
The connector must be located within three feet of the driver and must not require any tools to be revealed. Look under the dash and behind ashtrays.
What Communications Protocol does my vehicle use?
As a rule of thumb, GM cars and light trucks use SAE J1850 VPW (Variable Pulse Width Modulation).
Chrysler products and all European and most Asian imports use ISO 9141 or KWP2000 circuitry.
Fords use SAE J1850 PWM (Pulse Width Modulation) communication patterns.
All 2008 and newer model year vehicles use CAN.
There are some variations among captive imports such as the Cadillac Catera, a German Opel derivative, which uses the European ISO 9141 protocol.
On 1996 and later vehicles, you can tell which protocol is used by examining the OBD II connector:
If your vehicle has this style connector, but doesn't have these pins populated, you probably have a pre-OBDII vehicle.