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  Does My Car Have OBD-II?
Does My Car Have OBD-II?
10/30/2008 10:12:32 PM IP:59.40.91.* Read:8453 times
Does My Car Have OBD-II? All cars and light trucks built and sold in the United States after January 1, 1996 were required to be OBD II equipped. In general, this means all 1996 model year cars and light trucks are compliant, even if built in late 1995. Two factors will show if your vehicle is definitely OBD II equipped: 1) There will be an OBD II connector as shown below, and 2) There will be a note on a sticker or nameplate under the hood: "OBD II compliant". The Connector Pin 2 - J1850 Bus+ Pin 4 - Chassis Ground Pin 5 - Signal Ground Pin 6 - CAN High (J-2284) Pin 7 - ISO 9141-2 K Line Pin 10 - J1850 Bus Pin 14 - CAN Low (J-2284) Pin 15 - ISO 9141-2 L Line Pin 16 - Battery Power 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. The Three Flavors of OBD II While the parameters, or readings, required by OBD II regulations are uniform, the auto manufacturers had some latitude in the communications protocol they used to transmit those readings to scanners. Naturally, each felt they had the one true way, so we have three different OBD II communications protocols in use. The big scanner consoles costing thousands of dollars include the decoding software and firmware for all three protocols in their units, making them universal. Less expensive units, for home or small shop use, are usually customized for a specific communications protocol. Be sure the scanner you are using suits the protocol of your car. 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 circuitry. Fords use SAE J1850 PWM (Pulse Width Modulation) communication patterns. There are some variations among captive imports such as the Cadillac Catera, a German Opel derivative, which uses the European ISO 9141 protocol. If you have first hand knowledge of other such variations, please send them in and, together, we can build a more complete listing. On 1996 and later vehicles, you can tell which protocol is used by examining the OBD II connector: J1850 VPW--The connector should have metallic contacts in pins 2, 4, 5, and 16, but not 10. ISO 9141-2--The connector should have metallic contacts in pins 4, 5, 7, 15, and 16. J1850 PWM--The connector should have metallic contacts in pins 2, 4, 5, 10, and 16. If your vehicle has this style connector, but doesn't have these pins populated, you probably have a pre-OBDII vehicle. To add some confusion, even having the connector with the contacts shown above is not a guarantee of OBD II compliance. This style connector has been seen on some pre-1996 vehicles which were not OBD II compliant. Information on Pre-96 Cars A reader with the California Air Resouces Board provided this list of pre-96 OBD II engine designations. Note that CARB recognizes engine series, rather than vehicle models, so the engine designations are the true key, with the vehicle models provided as a courtesy. California Air Resources Board List of Certified OBD II Complying Engine Families and Models Engine Family Manufacturer Model(s) Fully Compliant? 1994 Model Year Certifications RAD2.8V8GFEM RFM3.8V8G1EK RFM4.6V8G1EK RMB2.2VJGCEK RMB3.2VJGCEK RNS2.0VJGDEK RTY3.0VJGFEK RTY2.7HGEEK RTY2.42HGEEK RVW2.8V8GFHM RVV2.3VHGFEK Audi Ford Ford Mercedes-Benz Mercedes-Benz Nissan Toyota Toyota Toyota Volkswagen Volvo 100 Mustang T-Bird, Cougar C220 C 280, S 320, SL 320 G20 Camry, ES300 T100 Previa, Previa All-Trac Corrado 850 Turbo No No No No No Yes No No No No No 1995 Model Year Certifications SBM5.4V8GAEK SCR2.0VJGFEK SCR122VJG2EK SCR2.0VJG2GK SCR2.0VJGFEL SDS2.0VJGFEK SFM3.828G1EK SFM3.8V8G1EK SFM4.6V8G1EK SFM4.6V8G1GK SFM2.318G1EK SFM3.028G1EK SFM3.018G1EK SFM3.028G1FK SFM4.018G1EK SFM4.6VJG1EK SFM4.028G1EK S1G3.8V8G1EK S3G4.319GFEJ S3G4.329GFGJ SIG2.3VJG2GK SHN2.7VJG1EK SHN2.7VJGFEK SHN2.5VJGKEK SHN3.0VJGKEK SJC4.0VJGAEK SJC6.0V8GFFK SJC4.0VJGFEK SKM1.8VJG1EK STK2.3VJGFEK STK2.5VJGFEK STK1.5VJG2EK STK1.8VJG1EK SFM2.318G1EK SFM3.018G1EK SFM3.028G1FK SFM4.018G1EK SFM4.028G1EK SMB3.6VJGFEK SMT1.5VJG2EK SMT1.8VJG2EK SMT2.4VJG2EK SNS2.4VJGFFK SNS2.0VJGFFK SNS3.0VJG1EK SNS3.0VJG1FK SNS2.4VJG2EK SNS1.6VJG2EK SNS2.0VJGFEK SNS3.0VJG1EK SLR4.0H8GOEK SFJ2.2VJGFEK STY3.41JG1GK STY3.42JG1GK STY3.0VJGFEK STY2.42HGJEK STY2.71HGEEK STY1.5VHGFEK STY4.0VJG1GK STY2.41HG1GK STY2.71HG1GK STY3.41JGFEK STY3.42JGFEK STY4.55JGFEK SVV2.3VJGFEK SVV2.4VJGFEK BMW Chrysler Chrysler Chrysler Chrysler Diamond Star Ford Ford Ford Ford Ford Ford Ford Ford Ford Ford Ford GM GM GM GMC Honda Honda Honda Honda Jaguar Jaguar Jaguar KIA Mazda Mazda Mazda Mazda Mazda* Mazda* Mazda* Mazda* Mazda* Mercedes Benz Mitsubishi Mitsubishi Mitsubishi Nissan Nissan Nissan Nissan Nissan Nissan Nissan Nissan Rover Subaru Toyota Toyota Toyota Toyota Toyota Toyota Toyota Toyota Toyota Toyota Toyota Toyota Volvo (TC) Volvo 750cl(V12), 850ci(V12) Dodge Neon, Plymouth Neon Dodge Neon, Plymouth Neon Dodge Neon, Plymouth Neon Dodge Neon, Plymouth Neon Eagle Talon, Mitsubishi Eclipse, Chrysler Sebring, Dodge Avenger Windstar Mustang T-Bird, Cougar Grand Marquis, Town Car, Crown Victoria Ranger Windstar Ranger Ranger Ranger Continental Ranger Camaro, Firebird S10 Pick-Up, Jimmy, Blazer S10 Pick-Up Cavalier, Sunfire Accord LX, EX (V6) Accord LX, EX (V6) TL NSX AJ16 (SC) V12 XJS Sephia Millenia Millenia Protege Protege B2300 B3000 B3000 B4000 B4000 S 320, C 280, SL 320 Summit, Mirage Summit, & Summit Wagon, Mirage, Expo, LRV Summit Wagon, Expo, LRV 240 SX G20 Maxima Maxima Altima Sentra/200 SX 200SX SE-R Maxima Range Rover New Model Legacy T100 2WD T100 2WD & 4WD Camry, Camry Wagon, ES300, Avalon Previa, Previa All-trac T100 2WD Tercel LS 400 Tacoma 2WD Tacoma 4WD Tacoma 2WD/4WD Tacoma 4WD Land Cruiser 850 Turbo Sedan/Wagon 850 Sedan/Wagon No No No No No No No No No No No No No No No No Yes No No Yes Yes Yes Yes Yes No No No No No No No No No No No No Yes No No No Yes Yes No No Yes Yes Yes No No Yes (A/T models only) Yes Yes Yes No Yes No No No No No No No No Yes A note accompanying this list indicated that certification is for the engine group only. The models listed are believed correct, but the engine is the deciding factor.
Admin (webmaster)  10/30/2008 10:12:32 PM IP:59.40.91.*