Quel protocole OBD ma voiture utilise-t-elle?

Il est possible que votre voiture n'utilise aucun protocole OBD. De nombreux véhicules peuvent communiquer avec une certaine forme d'outil d'analyse, but may not use an OBDII protocol. If your car is older, or from a country that does not require OBD, then your car may not respond to OBD requests for data.

La capacité d'un véhicule à communiquer en utilisant OBDII dépend de l'âge du véhicule, and the market that it was manufactured to be sold in. It is difficult for us to provide an accurate table of this data for you, as most countries set a date for full compliance, and also provide a ‘phase-in’ period in which the OBD requirements increase over time. Some do not publish their requirements openly, and some have different requirements for urban and rural areas.

With the help of our users and from published information, Nous avons pu trouver la liste des dates suivantes pour les véhicules légers:

Voitures et camions légers (typiquement < 14,000 lbs GVW) that were manufactured for sale in the listed country after the date shown will likely work well with our products. Si votre véhicule est plus ancien que cela ou a été importé, it may not be OBDII compliant so may not work (Même s'il utilise un connecteur d'apparence similaire). Note that large trucks and busses generally have different OBD requirements, and typically use different protocols too (usually SAE J1708 or SAE J1939).

Vehicles that comply with the OBDII standards will have a data connector within about one meter of the driver’s position. If the location is not obvious, check the owner’s manual as many newer vehicles list the location there. Dans la plupart des cas, it will be at the bottom of the dashboard, just out of sight from the driver’s position. Occasionally it will have a cover that needs to be removed, or moved sideways (Il y a quelques véhicules qui ont le connecteur derrière un panneau au centre du tableau de bord).

Le connecteur OBD est officiellement appelé connecteur de diagnostic SAE J1962 mais est également connu sous le nom de DLC, OBD Port, or OBD connector. It has positions for 16 épingles, and looks like this:

De nombreux véhicules plus anciens utilisent un type de connecteur similaire pour la communication avec les modules mais ne respectent pas les normes OBDII. Simply having a J1962 connector does not mean that the vehicle is OBDII compliant. Be aware of this when attempting to read vehicle codes (and be aware that you may cause damage to some circuits if you connect the wrong voltages to them). Recherchez toujours d'abord une section sur la conformité OBDII dans le manuel du propriétaire, for a sticker in the engine compartment, ou pour plus d'informations sur le site Web du fabricant, Pour être sûr que vous avez affaire à un véhicule conforme à l'OBDII.

Locate the J1962 connector in your vehicle, and determine if there are pins at positions 2, 6, 7, 10, 14, ou 15. Once you know which pins are used and which are not, then determine which standard applies from the following table:

not all ISO9141 or ISO14230 vehicles use pin 15 (the ‘L’ line)
The above should be considered a good guideline. The presence or absence of pins in the connector is not an absolute indication though, as only your vehicle manufacturer can say for sure which standards the vehicle was built to.

Dans ce cas, OBD-II is used as a general term and can mean any of the following:

OBD II (California ARB)
EOBD (European OBD)
JOBD (Japanese OBD)

You may also consult your vehicle’s owner’s manual and perhaps contact your local dealer. Cependant, be aware of the fact that many dealers do not know the difference between OBD and OBD-II.

If the vehicle is not OBD-II compliant, you cannot use a generic OBD-II scan tool to obtain diagnostic information from your vehicle.