OBDII OnBoard Diagnostic’s System Does My Car Have OBDII? The Connector… — Volkswagen Caddy wagon II

20 Янв 2015 | Author: | Комментарии к записи OBDII OnBoard Diagnostic’s System Does My Car Have OBDII? The Connector… — Volkswagen Caddy wagon II отключены
Volkswagen Caddy wagon II

Does My Car Have OBD-II?

All and light trucks built and in the United States after 1, 1996 were required to be OBD II In general, this means all model year cars and trucks are compliant, even if in late 1995.

Pin 2 — Bus+

Pin 4 — Chassis

Pin 5 — Signal Ground

Pin 6 CAN High (J-2284)

Pin 7 — ISO K Line

Pin 10 — J1850 Bus


Pin 14 — CAN Low (J-2284)

Pin 15 — ISO L Line

Pin 16 — Battery

Where is the connector located?

The must be located within feet of the driver and must not any tools to be revealed. Look the dash and behind ashtrays.

The Flavors of OBD II

While the parameters, or required by OBD II regulations are uniform, the manufacturers had some latitude in the protocol they used to those readings to scanners. each felt they had the one way, so we have five OBD II communications protocols in use.

The big scanner consoles costing of dollars include the decoding and firmware for all five protocols in units, making them Less expensive units, for or small shop use, are customized for a specific communications Be sure the scanner you are using the protocol of your car.

Communications Protocol does my use?

As a rule of thumb, GM and light trucks use SAE J1850 VPW Pulse Width Modulation). products and all European and most imports use ISO 9141 or KWP2000 Fords use SAE J1850 PWM (Pulse Modulation) communication patterns. All and newer model year use CAN.

There are some variations captive imports such as the Catera, a German Opel which uses the European ISO protocol. If you have first knowledge of other such please send them in together, we can build a more listing.

On 1996 and later you can tell which protocol is by examining the OBD II connector:

J1850 VPW connector should have contacts in pins 2, 4, 5, and 16, but not 10.

ISO 9141-2/KWP2000 —The connector have metallic contacts in 4, 5, 7, 15, and 16.

J1850 PWM —The connector have metallic contacts in 2, 4, 5, 10, and 16.

CAN —The connector should metallic contacts in pins 4, 5, 6, 14 and 16.

If vehicle has this style but doesn’t have these populated, you probably have a vehicle. To add some confusion, having the connector with the shown above is not a guarantee of OBD II This style connector has seen on some pre-1996 which were not OBD II compliant.

Information on Pre-96 Cars

A with the California Air Resouces provided this list of OBD II engine designations. Note CARB recognizes engine rather than vehicle so the engine designations are the true with the vehicle models as a courtesy.

California Air Resources List of

Certified OBD II Complying Families and Models

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