The ELM327 OBD2 Interface is a car diagnostic tool that is used to transmit data from OBD2 compliant vehicle to Laptop Computers, Desktop Computers, Android Smartphones, Android Tablets, iPhones and iPads. The technology that it provides with allow you to receive real-time information from the ECU (vehicles computer) and to Read and Clear Trouble Codes associated with the Check Engine Light.
The car diagnostic tool can be used with most OBD2 compliant vehicles and interfaces are compatible for use with Windows XP, 7, 8, 10, OSX, iPhone, iPad and Android Smartphones and Tablets. Some software applications have nice graphics while others have robust logging for diagnostic purposes. These scanners can be used for professional or entertainment purposes. Features The ELM327 can be paired with a number of different devices including Laptop Computers, iPhones, iPad, Samsung Galaxy Smartphones and Tablets, Android Smartphones and Tablets as well as OSX computers. For the best experience we recommend pairing a Bluetooth ELM with a Samsung Galaxy Smartphone or Samsung Galaxy Tab that has the Torque App installed. ELM327 Software The software that is right for you is a personal choice however can make a few recommendations.
ScanMaster-ELM - OBD-II KFZ Diagnostic Software for ELM327 Interfaces.
Interface Application Android Windows Mac OSX iOS Linux For a more in-depth analysis of software applications reference our article on. ELM327 Manuals The initial setup of your device and connecting for the first time can be difficult for the inexperienced however after that it is smooth sailing.
All of the possible pitfalls are detailed in this guide. Connecting for the first time should only take 5-10 minutes if you are following any of our quick start guides step by step. Some manuals such as USB and OSX are unavailable.
If this is the case, read over the other manuals and use them as a general reference. OBD2 Protocols and Compatibility The scanner is compatible with 99.9% of all vehicles that are produced after 1996 (per United States law and regulations) and will connect to all OBD2 CAN Bus Protocols including ISO15765-4 (CAN), ISO14230-4 (KWP2000), ISO9141-2, J1850 VPW, and J1850 PWM.
Some foreign vehicles or imports may not be compatible. Please be sure to check that your vehicle has an OBD2 port.
If you cannot find the OBD2 adapter plug check under the hood of the vehicle for a sticker noting that the vehicle is OBD-II compliant. Compatible makes include: BMW, Mazda, Chevy, Chrysler, Nissan, Ford, Honda, Fiat, Hyundai, Kia, Mitsubishi, Toyota, GM, Volkswagen, Audi, Mercedes Benz, Lexus, Subaru, Saturn, Porsche, Volvo, Saab and Pontiac. Bluetooth Pairing Codes & WiFi Passwords Bluetooth scanners use a pairing code to pair the device to your smartphone, tablet or laptop computer. Different manufacturers use different codes and some even change them from time to time. Most commonly the adapters will use '0000', '1234', '6789', '12345678' or something similar.
If the seller you purchased from did not give you with this try the numbers we provided. If they don't work, email the seller for help, and if they aren't any help just return the unit and buy one out of our store. We're not going to skimp when it comes to supplying you this. WiFi adapters use a code to secure the connection between your smart phone, tablet or computer and your interface. If it asks you for a code, enter '12345678' or another combination that would be easy to remember. If you are unable to figure out the code, contact the vendor who sold you the unit. Firmware The Version Interpreters have gone through several updates over the past few years.
In 2010 Chinese manufacturers upgraded from the v1.4 firmware interpreter to v1.5 which worked to provide a better overall experience for users. The new v1.5 units proved to be light-years ahead in terms of reliability, being able to connect and maintain connections without disruption.
If you have a working version of the v1.4 scanner and you are not experiencing any trouble, there is likely no need to upgrade. Performance differences between v1.4 and v1.5 scanners and likely not noticeable, the bulk impact of the update was in terms of reliability. New diagnostic scanners manufactured in China are being released with v2.0 and v2.1 firmware. Any possible improvements with these scanners is currently un-known. Clones The original processor chip did not implement copy protection and the code was copied by Chinese Manufacturers. These clone devices have taken the marketplace by storm and since their original implementation have grown to become more and more reliable while offering outstanding performance.
The code and hardware within clone devices has been updated on several occasions in order to keep up with market demand. The clone devices continue to be the most popular and most affordable in the marketplace. Realtime Data Sensors The ELM327 can read the following realtime data sensors. My scanner's power light is constantly flashing and I cannot connect to it by Bluetooth, what am I doing wrong? The case is most likely that the scanner you purchased is defective. It should be exchanged for a working unit. What is the difference between OBD2 and OBDII?
None, there is no difference. My scanner is not pairing, what am I doing wrong? Assuming you have a Bluetooth scanner, you can request the pairing code from the vendor you purchased the scanner from. If it continues to refuse to pair and you have tried all of the default pairing codes '0000', '1234', '5678', etc.
We suggest to return the scanner to the vendor and purchase from another seller. My scanner is not connecting to my iPhone, what should I do? Assuming you have purchased the Wifi model of the scanner (the Bluetooth model is not supported), you should consult the quick-setup guide that we have provided in this guide. If your scanner continues to refuse to connect, consult with the corresponding trouble-shooting points in the guide and if all else fails, return the scanner to whomever you purchased from and get a scanner from a reliable seller. My Wifi scanner is not broadcasting an SSID Signal, what's wrong?
This is most likely the sign of a defective unit. Contact the person you purchased it from and ask them to exchange for a tested unit or just buy from a reliable seller.
Can I update from v1.4 to v1.5 firmware? There is no way to apply this sort of update, you will need to purchase a new device. The interface is reporting that there is no response from the ecu, what do I do?
This is likely a sign of a defective unit. To be sure, disconnect the scanner and plug it into another vehicle.
If the vehicle is running and it continues to offer you trouble the part will likely need to be exchanged for a new unit. How do I change the COM-Port number assigned to the device? Go to the Device Manager control panel and locate the OBD2 Adapter under the 'Ports (COM & LPT)' sub menu. It may be titled 'USB Serial Port', if you can't locate it, unplug the adapter and plug it back in, you can watch it show up in real-time. Right click on the device and click 'Properties', click the 'Port Settings' tab and finally the click 'Advanced' button. Here you can change the COM-Port number, we suggest any COM Port between 2 and 5.
Click 'Ok' to save your settings. I have paired a Bluetooth OBD2 Adapter to my computer but when I attempt to connect to the assigned COM-Port it will not connect to the interface. What do I do? We suggest reinstalling the device drivers.
Here is a step by step walk-through: These instructions are written specifically from Windows 7, if you are using a different Windows Operating System, the steps you need to take should be similar. Open the Device Manager control panel. Find the COM & LPT menu and right click on the item titled 'Standard Serial over Bluetooth link' and select Uninstall. If there are two items, uninstall each of them. From the Bluetooth control panel, also remove the OBD-II adapter from there, right-click and remove the device.
Start your vehicle, plug in the adapter and click to 'Add a Device' in the Bluetooth menu. It will come up and you can enter the pairing code. Let everything re-install from scratch, it might take a minute or two for the adapter to finally show up in the device manager under the COM & LPT menu. You can have that open during the entire installation to watch its progress. If the COM-Port was set 4 or similar before, it should install to the same COM-Port.
We suggest using any COM 2-5. This can be changed from the properties menu. Open easy EasyOBD-II (this can be downloaded from our website) and connect to the COM-Port. The device at this point will begin to identify your scanner hardware and you are ready to 'Go Online' with your vehicle. If you changed the COM-Port during this process and EasyOBD-II is unable to connect to your diagnostic scanner, we suggest to conduct the reinstallation a second time starting from step one.
Where shoud I buy my scanner? The scanners can be purchased from sellers Amazon, eBay, Sears, NewEgg and a few other select websites. Reliability of these scanners is hit and miss as they are generally sold by small business with as few as a single person managing all operations of the business. It is important to purchase high quality diagnostic tools from sellers who understand the product and can help you get it connected from start to finish. If the seller has little to no knowledge of the product, it is suggest to not purchase from them. The reliability of these scanners can be poor and instruction to get the scanner connected can be limited. To avoid these hassles, we recommend to purchase a scanner directly from us as these scanners are generally free from faults and defects.
Disclaimer & Safety When using the diagnostic tools it is required that you take care if you are driving while this device is plugged in. If the OBD2 port is located near the gas and break pedals you should use extreme care and may require an extension cable to lift the tool up and away from your feet. As well, you should always keep your eyes on the road and take care not to be distracted by the data streaming to your smartphone or laptop. This should be viewed only by passangers in the vehicle. Always practice safe driving habits! Other Notes The ELM327 is a great tool for diagnostics on any OBD2 compliant vehicle and makes a great replacement to other tools that might cost you thousands of dollars. Although it does not support programming of the vehicle, the apps that it can be paired and can read a litmus of gauges to provide you with real-time information which is streamed directly from the vehicles computer.
We suggest any mechanic or car enthusiast to have one of these in their tool box. We strive to make the information provided in this guide as complete and accurate as possible. If you have any comments about this page, found it was useful, have information you would like to see added or any other suggestions we welcome your comments below. Please like and share the link to this page in forums or give it a +1 on Reddit. Hello, I recently bought a ELM 327 mini Bluetooth Interface from a company called UOBD2.net.
It came with a copy of the ScanMaster-ELM software. I paid.99 for the software and the interface packaged together. For some reason the ScanMaster-ELM software will not establish a Bluetooth connection through the interface to the ECU. Every time I try to make a connection I get a failure to connect error message from the ScanMaster software.
After doing some troubleshooting and research I think the problem is that the interface I purchased from UOBD2.net is using a cheap, Chinese copy of the original ELM 327 chip. The ScanMaster - ELM software is made by a German company named WGSoft. I have gone onto the WGSoft website. It's mostly in German but there appears to be a warning on the website referring to connection problems when trying to use ScanMaster together with cheap, Chinese copies of the ELM 327 chip.
I have contacted customer support at UOBD2.net, but that hasn't gotten me anywhere. I'm at a point where I think it might be time to just buy another ELM 327 interface from someone else - like this website perhaps.
At this point worrying about the.99 I paid isn't a priority. I just want something that will work with the ScanMaster software that I already have so I can start diagnosing the vehicle instead of trying to get the interface to function correctly. So what are my best, easiest and most reliable interface options? I'm using a IBM Thinkpad laptop that has factory Bluetooth and USB installed. It also has aftermarket WI-FI as well.
And the computer is running Windows XP. Thanks for your help.
Regards, Joe V.