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Complete Guide to ELM327 OBD2 Interface Adapter
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Complete Guide to ELM327 OBD2 Interface Adapter
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Hello, and Welcome to Racext’s Car Magazine column, the column aimed exclusively at the world of 4-wheeled vehicles with news, insights and guides, available every day here racext.com, today in this article we will talk about “Complete Guide to ELM327 OBD2 Interface Adapter”
Complete Guide to ELM327 OBD2 Interface Adapter
The ELM327 OBD2 interface is a car diagnostic tool that is used to transmit data from the OBD2 compliant vehicle to laptops, desktop computers, Android smartphones, Android tablets, iPhones and iPads. The technology it provides allows you to receive real-time information from the ECU (Vehicle Computer) and to read and resolve any trouble codes associated with the Check Engine Light.
The ELM327 OBD2 Car Diagnostic Tool can be used with most OBD2 compliant vehicles, and the interfaces are compatible with Windows XP, 7, 8, 10, OSX, iPhone, iPad and Android smartphones and tablets. Some software applications have good graphics, while others have robust logging for diagnostic purposes. These scanners can be used for professional or entertainment purposes
Features – OBD2 ELM327 interface
OBD2 tool ELM327 can be paired with numerous different devices including laptops, iPhones, iPads, Samsung Galaxy smartphones and tablets, Android smartphones and tablets, and OSX computers. </ span>
For the best experience, we recommend pairing a Bluetooth ELM with a Samsung Galaxy or Samsung Galaxy Tab smartphone that has the Torque app installed.
- Check and clear the Check Engine Light
- Read the sensors of real-time data ( View complete list)
- Power
- revs
- Acceleration
- throttle
- Speed
- Increment
- coolant
- Record data on your smartphone or laptop
- Record of lap times, acceleration and vehicle speed data
- View test results, graphs and data sensors in real time
- View Dials, Bars, Graphs, Digital Displays, Fuel Fuel Economy, Raw Data, GPS Positioning and Maps
- View MPG in real time (miles per gallon)
- Access the data in real time and receive it via email or text file
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OBD2 ELM327 adapters
Choosing the right interface doesn’t have to be complicated, you just have to choose the right one for your situation. To simplify this process we have divided the options (Bluetooth, Wifi or USB) in the following table which describes their compatibility.
Interface compatibility – OBD2 ELM327
| Interface | android | iOS | Linux | MacOSX | windows |
| Bluetooth | |||||
| USB | |||||
| Wi-Fi |
The Bluetooth interface is compatible with most operating systems, however if you want to use it on iOS (iPhone or iPad) you will need to use a WiFi interface. For more information on selecting the correct interface we suggest you read our detailed article on interfaces.
Where to buy the ELM327 OBD2 interface
Buying the diagnostic scanner from a trusted source is important. There are many vendors who know little or nothing about the device, sell low quality or faulty units that don’t work, and even can’t even provide installation instructions as ever. That said, it will save you a lot of time and possible trouble by offering you our DOCTOROBD OBD2 ELM327 professional diagnosis module. That said, we can only recommend purchasing them directly from our web store. The checkout process is quick and in most cases your item will be shipped in one business day or less. In addition to this you will be followed by our qualified staff and you can take advantage of our continuous complete and detailed guides.
Software ELM327 OBD2
The right software for you is a personal choice, however you can make some recommendations.
| Interface | Application |
| Android | Torque |
| Windows | ScanMaster-ELM |
| Mac OSX | Movi-Pro |
| iOS | DashCommand |
| Linux | PyOBD |
For a more in-depth analysis of software applications refer to our article on software.
ELM327 Manuals
Initial device setup and connection for the first time can be difficult for the inexperienced, but after that it’s smooth navigation. All possible pitfalls are detailed in this guide. Connecting for the first time should only take 5-10 minutes if you follow our quick step-by-step guides.
- Bluetooth configuration manual for Android OBD2 ELM327
- Bluetooth setup manual for Windows OBD2 ELM327
- USB installation manual for Windows OBD2 ELM327
- WiFi configuration for iPhone and iPad OBD2 ELM327
- WiFi installation manual for WindowsOBD2 ELM327
Some manuals such as USB and OSX are not available. If so, read the other manuals and use them as a general reference.
OBD2 ELM327 protocols and compatibility
The scanner is compatible with 99.9% of all vehicles manufactured after 1996 (per US 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. Make sure to check that your vehicle has an OBD2 port. If you can’t find the OBD2 adapter plug, check under the vehicle’s hood for a sticker, noting that the vehicle is OBD-II compliant.
Compatible brands 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 and WiFi passwords
Bluetooth scanners use a pairing code to pair the device with your smartphone, tablet or laptop. Different manufacturers use different codes and some even change them from time to time. Most commonly, adapters use “0000”, “1234”, “6789”, “12345678” or something similar. If the seller you bought from did not give you this try the numbers we have provided. If they don’t work, email the seller for help and if there is no help return the unit and purchase one from our shop. We don’t want to skimp when it comes to providing you with this.
WiFi adapters use a code to secure the connection between your smartphone, tablet or computer and the interface. If it asks for a code, enter “12345678” or another combination that is easy to remember. If you cannot understand the code, contact the seller who sold you the unit.
firmware – OBD2 ELM327 interface
Version interpreters have undergone several updates over the past few years. In 2010, Chinese manufacturers switched from firmware interpreter v1.4 to v1.5, which worked to provide users with a better overall experience. The new v1.5 units have proven to be light years ahead in terms of reliability, being able to connect and maintain connections without interruption. If you have a working version of the scanner v1.4 and you are not having any problems, it is likely that you do not need to upgrade. Performance differences between v1.4 and v1.5 scanners and probably not noticeable, the overall impact of the update was in terms of reliability. New diagnostic scanners made in China are released with firmware v2.0 and v2.1. Any improvements with these scanners are currently unknown.
clones – OBD2 ELM327 interface
The original processor chip did not implement copy protection and the code was copied from Chinese manufacturers. These clone devices have taken the market by storm and since their original implementation has become more and more reliable offering outstanding performance. The code and hardware inside the clone devices have been updated on several occasions in order to keep up with the market demand. Clone devices continue to be the most popular and most affordable on the market.
ELM327 OBD2 interface real-time data sensors
The ELM327 can read the following data sensors in real time.
| Absolute throttle position accelerator pedal Fuel ratio air Ambient air temperature Average speed of the trip Barometer Pressure atmospheric Catalysis Temperature Equivalence Ratio command Cost per mile CO2 emissions Distance to empty Fuel tank distance Traveled by ECU error code cleared Distance traveled while Check Engine Light On Commanded EGR EGR error Engine coolant temperature Motor kW Load of engine Oil temperature RPM engine Ethanol Fuel Percentage Evap System Steam pressure Exhaust gas temperature Cost of fuel Scope of fuel level fuel Pressure of fuel Pressure of fuel Tank pressure Fuel bank |
Fuel used (travel) GPS Accuracy GPS altitude GPS Bearing GPS Latitude GPS Longitude GPS satellites Horsepower intake air temperature Intake manifold pressure kilometers per liter Mass Air Flow miles per gallon O2 Sensors O2 Volt relative acceleration pedal position relative Throttle Position Duration From the moment the engine is started Speed Timing of throttle position Frequency of progress of the transmission of the offset torque Average travel frequency of the KPL Media Trip Trip Release time Turbo Boost and Vacuum Gauge Voltage (control module) Volumetric efficacy |
OBD2 Trouble Codes – OBD2 ELM327 Interface
OBD2 trouble codes (OBDII or OBD-II) can be used for troubleshooting problems related to cars, trucks, and other vehicles. These trouble codes are stored in the vehicles ECU (electronic control unit) and help identify why the vehicles are checking that the engine light has come on.
COM ports – OBD2 ELM327 interface
Know what the COM-Port the device is connected to is connected to when using software that does not detect it automatically. You should always need to know the COM port if you are using Windows or OSX. In these operating system environments, most software packages (ScanMaster being an exception) require identification of the correct COM port. If the correct COM port is not selected, the device will fail to connect. In Windows, you can find the COM number in the Device Manager control panel. The hardware can be found under the ‘Ports (COM and LPT)’ submenu. If you can’t find it, unplug your device and plug it back in. You can see the hardware display in real time.
Troubleshooting OBD2 ELM327 interface
These are some of the common problems with ELM327 interfaces and how to diagnose them.
| Problem | Solution |
| ECU connection failed | Make sure the vehicle is running or the ignition switch is supplying power to the vehicle; Make sure that the scanner is connected to the interface in use (for example laptop or smartphone); Try connecting to another vehicle |
| Error detecting OBD-II protocol | Make sure the vehicle is running or the ignition switch is supplying power to the vehicle; Make sure that the scanner is connected to the interface in use (for example laptop or smartphone); Try connecting to another vehicle |
| No connection to ECU | Make sure the vehicle is running or the ignition switch is supplying power to the vehicle; Make sure that the scanner is connected to the interface in use (for example laptop or smartphone); Try connecting to another vehicle |
| No response from the ECU | Make sure the vehicle is running or the ignition switch is supplying power to the vehicle; Make sure that the scanner is connected to the interface in use (for example laptop or smartphone); Try connecting to another vehicle |
| No Wifi SSID | Make sure the vehicle is running or the ignition switch is supplying power to the vehicle; Make sure a red light is on on the scanner; Make sure that Wi-Fi is enabled on your device (eg. Laptop or smartphone) |
| Not connected | Check that the vehicle is powered and that a red light is on on the scanner; Make sure that Bluetooth or WiFi is enabled on the receiving device (eg laptop or smartphone) |
| Don’t pair | Make sure Bluetooth is enabled and the pairing code is correct |
| Red light only | This is a sign that the scanner is receiving power; Connect to the scanner via Bluetooth or Wifi |
| Unable to connect | Make sure the vehicle is running, a red light illuminates on the scanner and that Bluetooth or WiFi is enabled on the receiving device (eg laptop or smartphone) |
OBD2 ELM327 interface FAQ
The scanner’s power light blinks constantly and I can’t connect via Bluetooth, what am I doing wrong?
The case is very likely that the scanner you purchased is faulty. It should be exchanged for a unit of work.
What is the difference between OBD2 and OBDII?
Nobody, there is no difference.
My scanner is not paired, what am I doing wrong?
Assuming you have a Bluetooth scanner, you can request the pairing code from the dealer where you purchased the scanner. If it still refuses to pair and you have tried all the default pairing codes “0000”, “1234”, “5678”, etc. We recommend that you return the scanner to the seller and purchase it from another seller.
My scanner won’t connect to my iPhone, what should I do?
Assuming you have purchased the Wifi model of the scanner (the Bluetooth model is not supported), you need to consult the quick start guide provided in this guide. If the scanner still refuses to connect, check the corresponding troubleshooting points in the guide and if all else fails, return the scanner to whoever you purchased it and get a scanner from a reputable seller.
My Wifi scanner is not broadcasting an SSID signal, what’s wrong?
This is most likely a sign of a faulty drive. Contact the person you purchased and ask them to exchange a tested unit or just buy from a reputable seller.
Can I upgrade from firmware v1.4 to v1.5?
There is no way to apply this type of update, you need to purchase a new device.
The interface is reporting that there is no response from the ecu, what should I do?
This is likely a sign of a faulty drive. For safety, unplug the scanner and connect it to another vehicle. If the vehicle is running and continues to offer problems, the part will likely need to be replaced with 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 and LPT)’ submenu. It may be titled ‘USB Serial Port’, if you can’t find it, unplug the adapter and plug it back in, you can see it pop up in real time. Right-click on the device and click on “Properties”, then on the “Port Settings” tab and finally on the “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 try to connect to the assigned COM port it will not connect to the interface. What I do?
We recommend that you reinstall the device drivers. Here is a walkthrough – these instructions are written specifically by Windows 7, if you are using a different Windows operating system, the steps to take should be similar.
-
- Open the Device Manager control panel
- Find the COM and LPT menu and right-click on the “Standard Serial Connection via Bluetooth” entry and select Uninstall. If there are two entries, uninstall each of them.
- From the Bluetooth control panel, also remove the OBD-II adapter from there, right click and remove the device.
- Start the vehicle, connect the adapter and click “Add a device” in the Bluetooth menu. It will appear and you can enter the pairing code.
- Let everything install from scratch, it may take a minute or two for the adapter to appear in Device Manager in the COM and LPT menu. You can have it open during the entire installation to see its progress.
- If COM port has been set 4 or similar before, it should install on the same COM port. We suggest using any COM 2-5. This can be changed from the properties menu.
Open Easy Easy-II-II (which can be downloaded from our website) and connect to the COM port. At this point the device will begin to identify the scanner hardware and you are ready to “go online” with your vehicle. If you have changed the COM port during this process and EasyOBD-II is unable to connect to the diagnostic scanner, we suggest you do the reinstallation a second time starting from the first step.
Where should I buy my scanner?
The scanners can be purchased from sellers Amazon, eBay, Sears, NewEgg, and a few other select sites. The reliability of these scanners is hit and miss, as they are generally sold by small businesses with a few people managing all of the company’s operations. It is important to purchase high quality diagnostic tools from sellers who understand the product and can help you connect it from start to finish. If the seller has little or no knowledge of the product, it is advised not to buy from them. The reliability of these scanners can be poor and the instructions for getting the scanner connected can be limited. To avoid these inconveniences, we recommend purchasing a scanner directly from us as these scanners are generally free from defects.
There are many vendors who know little or nothing about the device, sell low quality or faulty units that don’t work, and even can’t even provide installation instructions as ever. That said, it will save you a lot of time and possible trouble by offering you our professional OBD F-TYPE diagnosis module. That said, we can only recommend purchasing them directly from our web store. The checkout process is quick and in most cases your item will be shipped in one business day or less. In addition to this you will be followed by our qualified staff and you can take advantage of our continuous complete and detailed guides.
Disclaimer and safety – OBD2 ELM327 interface
When using the diagnostic tools you should be careful if you drive while this device is connected. If the OBD2 port is near the gas and your pedals break, you need to be extra careful and you may need an extension cable to lift the tool up and away from your feet. Also, you should always keep your eyes on the road and be careful not to be distracted from streaming data to your smartphone or laptop. This should only be seen by passengers in the vehicle. Always practice safe driving habits!
Other known ELM327 OBD2 interface
OBD2 ELM327 is a great tool for diagnostics on any OBD2 compliant vehicle and perfectly replaces other tools that could cost you thousands of dollars. While it does not support vehicle programming, the apps can be paired and can read a litmus test to provide real-time information broadcast directly from the vehicles’ computer. We suggest any mechanic or car enthusiast to have one of these in their toolbox.
We strive to make the information provided in this guide as complete and accurate as possible. If you have any comments on this page, found it to be helpful, have information you would like to see added or other suggestions, we welcome your comments below. Please share the link to this page in the forums or social networks.
Discover the Power of Advanced Vehicle Diagnostics with DoctorOBD
Are you a car enthusiast or a professional mechanic looking for the ultimate tool to understand and resolve vehicle issues? Dive deep into the world of automotive diagnostics with the ELM327 OBD2 Interface Adapter. This state-of-the-art diagnostic tool allows you to connect with your vehicle’s ECU, offering real-time data, reading trouble codes, and ensuring your vehicle runs at its optimal performance. Whether you’re using a laptop, smartphone, or tablet, the ELM327 is compatible with a range of devices, making it a versatile choice for all your diagnostic needs. Don’t miss out on harnessing the full potential of your vehicle. Click on the button below and elevate your diagnostic game!
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Recommended Articles for ELM327 Users
As an ELM327 user, you may find the following articles helpful for troubleshooting, setup, and maximizing the potential of your device:
If you are experiencing issues with ELM327 USB driver compatibility on Windows 8, 8.1, or 10, we recommend reading our article on ELM327 USB Driver Incompatibility. This article provides insights and solutions to overcome any driver-related obstacles you may encounter.
For a comprehensive guide on setting up your ELM327 USB device on Windows, we have an informative manual available at ELM327 USB Setup Manual for Windows. This step-by-step guide will walk you through the installation process and ensure a smooth setup experience.
If you’re using an iPhone and want to connect your ELM327 device via WiFi, our ELM327 WiFi Installation Manual for iPhone provides detailed instructions on how to establish a WiFi connection between your iPhone and ELM327 device.
Similarly, if you prefer using a Windows computer with WiFi connectivity, our article on ELM327 WiFi Installation Manual for Windows will guide you through the necessary steps to set up the WiFi connection and get your ELM327 device up and running.
For a deeper understanding of ELM327 and its capabilities, our Complete Guide to ELM327 OBD2 Interface Adapter covers everything you need to know about this versatile diagnostic tool. From its functionalities to compatibility and usage tips, this guide is a valuable resource for both beginners and experienced users.
Curious about the sensors that ELM327 can read? Our article on Which Sensors Does ELM327 Read? delves into the various sensors and data parameters that your ELM327 device can access, providing insights into the extensive information it can retrieve from your vehicle.
If you’re wondering about the different ELM327 interfaces available, our article on What Are the ELM327 Interfaces? explores the various interface options, such as USB, WiFi, and Bluetooth, helping you choose the right interface for your specific needs.
To discover a wide range of software applications compatible with ELM327, our Software ELM327 article provides an overview of recommended applications for different platforms, including Windows, Android, and iOS.
Looking for guidance on configuring ELM327 Bluetooth on your Android device? Our ELM327 Bluetooth Configuration Manual for Android offers step-by-step instructions to help you establish a stable Bluetooth connection.
If you’re using Windows and want to install ELM327 Bluetooth, our ELM327 Bluetooth Installation Manual for Windows provides detailed guidance to set up the Bluetooth connection and get your ELM327 device ready for use.
Lastly, if you’re interested in exploring top-rated OBD2 software options for laptops and PCs, our article on Top-Rated OBD2 Software for Laptops/PCs: A Mechanic’s Review of Free Options offers a comprehensive review of some of the best free software applications available for diagnostic purposes.
We hope that these articles provide valuable insights and solutions for your ELM327 journey. Whether you’re troubleshooting issues, setting up your device, or seeking software recommendations, these resources cover a wide range of topics to assist you.
Remember to bookmark this page for future reference and stay tuned for more informative articles on ELM327 and automotive diagnostics!
Recommended Articles for ELM327 Users
As an ELM327 user, you may find the following articles helpful for troubleshooting, setup, and maximizing the potential of your device:
- ELM327 USB Driver Incompatibility with Windows 8/8.1 or 10
- ELM327 USB Setup Manual for Windows
- ELM327 WiFi Installation Manual for iPhone
- ELM327 WiFi Installation Manual for Windows
- Complete Guide to ELM327 OBD2 Interface Adapter
- Which Sensors Does ELM327 Read?
- What Are the ELM327 Interfaces?
- Software ELM327: Exploring the Power of Diagnostic Applications
- ELM327 Bluetooth Configuration Manual for Android
- ELM327 Bluetooth Installation Manual for Windows
- Top-Rated OBD2 Software for Laptops/PCs: A Mechanic’s Review of Free Options
These articles provide valuable insights, step-by-step instructions, and troubleshooting tips to enhance your ELM327 experience. Whether you are facing driver compatibility issues, setting up your ELM327 device, or seeking recommendations for software applications, these resources cover a wide range of topics to assist you.
Remember to bookmark this page for future reference and stay tuned for more informative articles on ELM327 and automotive diagnostics!
The Comprehensive Guide to ELM327 OBD2 Interface Adapter
The world of automotive diagnostics has evolved significantly with the introduction of OBD2 technology. At the forefront of this revolution is the ELM327 OBD2 Interface Adapter. This article aims to provide an in-depth understanding of the ELM327, addressing common queries and offering valuable insights for both beginners and professionals.
1. ELM327 OBD2 Guide
What is the ELM327 OBD2 Interface Adapter?
The ELM327 OBD2 Interface Adapter is a diagnostic tool that allows users to access and diagnose vehicle-related issues. It connects to the vehicle’s OBD2 port and communicates with various systems to retrieve real-time data, fault codes, and more.
How Does It Work?
Once connected to the vehicle, the ELM327 OBD2 Interface Adapter communicates with the car’s computer system. Using specialized software on a smartphone or computer, users can read and clear fault codes, monitor real-time data, and perform other diagnostic tasks.
2. ELM327 Compatibility Issues
Common Compatibility Problems
While the ELM327 is designed to be universally compatible with OBD2 vehicles, some users might face ELM327 compatibility issues. These can range from software mismatches to physical connection problems.
Solutions to Compatibility Issues
- Update the Software: Ensure that you’re using the latest version of the diagnostic software.
- Check the Vehicle’s OBD2 Port: Some vehicles might have a unique pin configuration. Ensure the adapter fits securely.
- Try a Different App: There are multiple apps available for the ELM327. If one doesn’t work, another might.
3. ELM327 Software Recommendations
For the best experience with the ELM327 OBD2 Interface Adapter, it’s crucial to pair it with reliable software. Some top ELM327 software recommendations include:
- Torque Pro: Offers real-time data, fault code reading, and more.
- OBD Car Doctor: Provides extensive vehicle diagnostics.
- OBD Fusion: Known for its user-friendly interface and detailed data.
4. How to Connect ELM327 to iPhone
Connecting your ELM327 to an iPhone is a straightforward process:
- Enable Bluetooth or WiFi on your iPhone: Depending on your ELM327 version.
- Plug the ELM327 into the OBD2 port of your vehicle.
- Open your preferred diagnostic app on the iPhone.
- Search for available devices and select the ELM327.
- Pair the devices, and you’re ready to diagnose!
5. ELM327 Real-time Data Sensors
The ELM327 real-time data sensors capability is one of its standout features. It can read:
- Engine RPM
- Calculated Load Value
- Coolant Temperature
- Fuel System Status
- Vehicle Speed, and more.
6. OBD2 ELM327 Troubleshooting
Facing issues with your adapter? Here are some common OBD2 ELM327 troubleshooting tips:
- Check the Connection: Ensure the adapter is securely plugged into the OBD2 port.
- Restart the App: Sometimes, simply restarting the diagnostic app can resolve issues.
- Update the Adapter’s Firmware: Ensure you’re running the latest firmware version.
7. ELM327 Bluetooth vs WiFi
When choosing between ELM327 Bluetooth vs WiFi, consider:
- Range: WiFi versions typically offer a longer range.
- Compatibility: Bluetooth versions might be more universally compatible.
- Speed: WiFi can provide faster data transfer rates.
8. Best ELM327 Adapters
Looking for the best ELM327 adapters? Consider:
- Build Quality: A robust build ensures longevity.
- Compatibility: Ensure it supports both iOS and Android.
- User Reviews: Check online reviews for real-world feedback.
9. ELM327 Firmware Updates
Staying updated with the latest ELM327 firmware updates ensures optimal performance and compatibility. Regularly check the manufacturer’s website or the app for updates.
10. ELM327 for Professional Mechanics
For professional mechanics, the ELM327 offers:
- Advanced Diagnostics: Beyond basic fault codes.
- Real-time Data Monitoring: Essential for in-depth analysis.
- Versatility: Compatible with a wide range of vehicles.
In conclusion, the ELM327 OBD2 Interface Adapter is an invaluable tool for anyone interested in vehicle diagnostics. Whether you’re a beginner or a professional mechanic, understanding its features and capabilities can greatly enhance your diagnostic experience.
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Complete Guide to ELM327 OBD2 Interface Adapter
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NOTE: In the event that the product is not available in stock, we reserve the right to issue a full and immediate refund.