All Foxwell Scan Tools come with a 12 month factory warranty.
We provide technical support for all of our tools, if you ever get stuck diagnostically simply get in touch with us or our support network. We can provide suggested tests and even in some cases, test procedures.
What is OBDII
Short Version : OBD (On Board Diagnostics) was legislated so that any repairer could diagnose any fault relating to emissions with one piece of diagnostic equipment that covers all vehicle manufactures.
OBD (On Board Diagnostics) technology was initiated by the US EPA (Environmental Protection Agency’s) and CARB (California Air Resources Board’s) mandates that vehicles be equipped with more sophisticated emissions equipment and better diagnostics systems to monitor that equipment. The agencies wanted to ensure that new vehicles were running as cleanly and efficiently as they could. However, purchasing diagnostics equipment for each of the manufacturers’ proprietary vehicle information systems would be prohibitive for third-party garages and testing centres. Thus, the OBD standard (and the subsequent OBD-II revision) was born.
Is My Car OBDII Compliant?
All cars and light trucks built and sold in the United States after the 1st January, 1996 were required to be OBDII compliant. In general, this means all 1996 model year cars and light trucks are compliant.Petrol vehicles manufactured in Europe were required to be OBDII compliant after the 1st of January, 2001. Diesel vehicles were not required to be OBDII compliant until January 1, 2004.
It was legislated in Australia and New Zealand that vehicles manufactured were required to be OBD II compliant after the 1st of January, 2006, however there are vehicles manufactured before this date are OBD II compliant, but varies varies between models and makes.
Two factors will show if your vehicle is OBD II compliant:
1 – There will be an OBD II connector, and
2 – There will be a note on a sticker or nameplate under the bonnet or in the door pillar stating “OBD II compliant” or “OBD II Certified”.
Where is the OBDII connector ?
The connector must be located within 90 cm’s of the driver’s seat and must not require any tools to be revealed. Most are located under the steering column. If your OBDII connector is not there, look under the dash and behind ashtrays.
Some exceptions :
Note 1: Astra OBDII connector location – Under the handbrake cover
Note 2: A lot of Volkswagen and Audis OBDII connectors are under the rear ashtray in the centre console.
What are OBDII Protocols?
Short Version: Auto manufacturers had some leeway in the communications protocol they used to transmit parameters or PIDs, which are required by law to be uniform, to scanners. There are currently five different OBD II communications protocols in use: KWP, PWM, VPW, ISO 9141, and CAN.
OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.
SAE standard J/1979 defines many PIDs, but manufacturers also define many more PIDs specific to their vehicles. All light duty vehicles sold in North America since 1996, as well as medium duty vehicles beginning in 2005, and heavy duty vehicles beginning in 2010, are required to support OBD-II diagnostics, using a standardised data link connector, and a subset of the SAE J/1979 defined PIDs (or SAE J/1939 as applicable for medium/heavy duty vehicles), primarily for state mandated emissions inspections.
What CAN 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.
On 1996 and later vehicles, you can tell which protocol is used by examining the OBD II connector:
J1850 VPW – The connector should have locations 2, 4, 5, and 16 populated, but not 10 populated.
ISO 9141-2 – The connector should have locations 4, 5, 7, 15, and 16 populated.
J1850 PWM – The connector should have locations 2, 4, 5, 10, and 16 populated.
CAN Bus – The connector should have locations 4, 5, 6, 14, and 16 populated.
ISO 14230 KWP – The connector should have locations 4, 5, 7, 15, 16 populated.
If your vehicle has this style connector, but does not 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.
Most vehicle manufacturers have switched over to CAN bus protocols since 2006
On this vehicle we can identify the protocol used by the manufacture by counting the pins with terminations.
-Note as you can see not all connectors are installed in the correct orientation.
4) Chassis Ground
5) Signal Ground
6) Can (J02234) High
11) Vendor Option
14) CAN (J2234) Low
16) Battery Power
With this information about pin allocation we know that this vehicle is CAN Compliant in the J-2234 Protocol