Abstract:
This invention relates generally to releasable connectors with a wireless connection between automotive test equipment and an automobile On-Board Diagnostic computer wherein the data link connection (DLC) cable is replaced, using two connectors which have been pre-programmed to communicate with each other.

Description:
FIELD OF THE INVENTION 
   This invention relates generally to equipment for monitoring an automobile On-Board Diagnostic computer, and more particularly to a wireless connection, wherein the data link connection (DLC) cable is replaced, using two connectors which have been pre-programmed to communicate with each other. 
   BACKGROUND 
   An On-Board Diagnostic, or OBD, system is a computer-based system for diagnosing operational errors. An On-Board Diagnostic, or OBD, system is a computer-based system that was developed by automobile manufacturers to monitor the performance of various components on an automobile&#39;s engine, including emission controls. Modern vehicles typically have a vehicle diagnostic system, including one or more separate computer control modules. Examples of such computer control modules (also known as just “modules”) are: a power train control module (PCM), an engine control module (ECM), a transmission control module (TCM), an ABS control module, and an air bag control module. Upon detection of any malfunction, the OBD system provides the owner of the automobile with an early warning (in other words, check engine light in the dashboard of automobile). OBD was primarily introduced to meet EPA emission standards but, through the years, onboard diagnostic systems have become more sophisticated. For example, OBD II, Standard Edition in the mid-90s implemented in light-duty cars and trucks, provides a plurality of sensors to monitor malfunctions with engine, chassis, body, and accessory devices. In a simple scenario, the OBD system detects a malfunction in the engine (or any other component that is monitored by sensors of the OBD system) and signals a warning indicative of such a function. For example, a “check engine” light could be illuminated in an automobile&#39;s dashboard indicative of such a malfunction. The automobile&#39;s owner, upon noticing such a warning indicator, makes plans for taking the automobile to a repair shop where the malfunction can further be investigated. Upon arrival at the repair shop personnel connect a data link cable that serves as a communications link between the automobile&#39;s diagnostic port and an “off-board” device. Off-board devices,” such as scan tools and code readers, are known in the art. Scan tool and code reader testing devices that interface with vehicle diagnostic systems access, display, and/or print vehicle diagnostic information. OBD II (On-Board Diagnostics version II) Scan Tools are one commonly known type of scan tool and are governed by a number of standards, e.g., SAE J1978 Rev. 1998-02 and SAE J1979 Rev. 1997-09. Scan tools are relatively expensive diagnostic devices that have a relatively large number of features and are typically marketed to professional automobile mechanics and service stations. There are different types of scan tools. An “OBD II Scan 45 Tool” complies with the above-identified specifications. By contrast, a “Manufacturer-Specific Scan Tool” is a scan tool that accesses and displays proprietary manufacturer-specific data (and possibly also additionally accesses and displays OBD II data. A code reader is another example of an “off-board” device. 
   The “off-board” device may be a somewhat stationary scan tool test station, laptop or mobile code reader/scan tool, all connected to a data link cable. An example of a semi-stationary scan tool test station is found in a smog test station where a long data link cable can be seen stretching from the “off-board” device to the automobile. 
   SUMMARY OF THE INVENTION 
   It is the object of this invention to provide a system and method in the form of a pair of preprogrammed releasable wireless connections replacing an automotive data link cable (DLC) for communicating information between a motor vehicle data bus and an automotive code reader/scanner. The wireless DLC has a first connector which fits to the motor vehicle data bus and a second connector which fits with the automobile code/reader scanner. The first connector has readout conductors, a processor and memory that connect to a vehicle data bus connector, the vehicle data bus connector having a plurality of readout conductors which communicate with corresponding readout conductors in the first connector unit. A program in the first connector links wireless information with the appropriate readout conductors. The second connector has readout conductors, a processor and memory that connect to an automotive code reader/scanner connector having a plurality of readout conductors which communicate with corresponding readout conductors in the second connector unit. A program in the second connector links wireless information with the appropriate readout conductors. The first and second connectors each have wireless circuitry and programming wherein they connect automatically with each other once they receive power. The first connector receives its power from the automobile and the second connector receives its power from the test equipment it is attached to. In an alternative, the first and second connectors may be battery operated. A further option would be rechargeable batteries. 
   In a preferred embodiment, the first and second connectors are code matched pairs which are pre-programmed to mutually wirelessly communicate with each other. This embodiment extends to multiple pairs of first and second connectors, with each pair having different matching wireless frequencies. 
   In another embodiment the first and second connectors have a touch screen wherein multiple connection frequencies may be selected. This is advantageous where there is a single test unit and multiple vehicles. Each vehicle can have a different coded first connector unit and the test unit second connector can be recoded to communicate with each vehicle&#39;s connector. An example would be code numbers  1 - 10 , wherein code number  1  on the test unit connector connects with code number  1  on the automobile connector and changing the test unit connector to code number  6  allows the test unit to connect with a nearby automobile with a vehicle connector with code number  6 . 
   The wireless connection may be Blue Tooth, Ethernet, RF, WLAN, wireless USB or other forms of wireless transmission. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of an automotive test unit connected by DLC cable to an automobile; 
       FIG. 2  is a perspective view of a hand held OBD2 automotive test unit connected by DLC cable to an automobile: 
       FIG. 3  is a perspective view of a computer connected to an automobile; 
       FIG. 4  is a perspective view of a of an OBD2 handheld test unit connected to an automobile bus connector; 
       FIG. 5  is a perspective view of a second connector unit wirelessly connected to a first connector unit; 
       FIG. 6  is a perspective view of a second connector unit wirelessly connected to a first connector unit wherein the unit communication code numbers are changeable; and 
       FIG. 7  is a perspective view of second connector units with different codes connecting with correspondingly coded units on different automobiles. 
   

   DETAILED DESCRIPTION 
   The present invention relates to a wireless connection replacing an automotive data link connector (DLC) which connects an on-board automotive computer to devices such as found in automobile smog test centers and repair shops, computers and handheld OBD units.  FIGS. 1-4  reveal the prior art of the data link connector cable (DLC).  FIG. 1  discloses an emissions test unit  1  as found in an emissions test facility. The DLC cable  2  connects the emissions test unit  1  to the vehicle data bus  4 . The DLC cable  2  has a multiple pin removable vehicular connector  5  which attaches to the vehicle data bus  4 . The opposite end of the DLC cable  2  has a multiple pin removable tester connector  6  attaching to a multiple pin connector  7  of the test unit, commonly 16 pins. In  FIG. 2  the DLC cable  2  is connected to an OBD II code reader/scanner  8  25 pin connector  9 . In  FIG. 3 , the DLC cable  2  is connected to a computer  10  pin connector  11 .  FIG. 5  discloses a close-up view of the DLC cable  2  with an OBD II code reader/scanner  8  as disclosed in  FIG. 2 . 
     FIG. 5  discloses a preferred embodiment of the wireless automotive data link connectors  21 ,  24 . The first connector unit  21  has readout conductors  22  which mate with readout conductors of the vehicle data bus  4  as shown in  FIGS. 1-3 . A processor and memory are programmed in the first connector unit  21  to link wireless information  23  with the appropriate readout conductors  22 . The processor is programmed with a wireless connection  23  pre-programmed to directly connect to the second connector unit  24 . A red light  25  indicates power is being received from the automobile data bus  4  and a green light  26  indicates a wireless connection  23  between the first connector unit  21  and the second connector unit  24 . A number  27  on each connector  21 ,  24  matches indicating the connectors  21 ,  24  only have a wireless connection with each other. The second connector unit  24  with readout conductors  22  that mate to an automotive code reader/scanner  8 , as in  FIG. 4  with a plurality of readout conductors  9  which communicate with corresponding readout conductors in the second connector unit  24 . 
   A processor and memory are programmed in the second connector unit  24  to link wireless information with the appropriate readout conductors  22 . The processor is programmed with a wireless connection  23  pre-programmed to directly connect to the first connector unit  21 . A red light  25  indicates power is being received from the automobile data bus  4  and a green light  26  indicates a wireless connection  23  with the first connector unit  24 . A number  27  on each connector  21 ,  24  matches indicating the connectors  21 ,  24  only have a wireless connection with each other. In  FIG. 5  each connector unit has the number one  27 . 
     FIG. 6  shows the number nineteen on each connector unit  21 ,  24 . The connector units  21 ,  24  are in a plurality of matched pairs, requiring no programming. The connector units  21 ,  24  are removably plugged into their respective fittings.  FIG. 7  discloses a preferred embodiment wherein the second connector unit  24  has a LCD touch screen  27  wherein different numbers can be selected to match different numbered  28  first connector units  21 . The programmable second connector unit  24  can be programmed to communicate with the first connector unit  21  on the vehicle and reprogrammed to connect wirelessly with a second connector unit  24  on a computer  10 . An OBD II first unit  21  may have a variety of adapters. The adapters are for OBD prior to 1996. Examples of adapters are: GM 82-95, Ford 83-95, Chrysler/Jeep 84-95 and Toyota/Lexus 89-95. This list is not intended to limit all the types of adapters. 
   The present invention has been described in specific embodiments; but there is no intention to limit the invention to these variations. The spirit of the invention is the invention provides a wireless automotive DLC which simply snaps into place and functions without programming other than selecting the unit numbers in one of the variations