A few days ago we launched the updated OBD Auto Doctor software. This time our main focus was in calculated performance parameters such as Engine Torque, Engine Horsepower and Turbo Boost Pressure.
You can now measure the performance of your car by monitoring these new sensors in real time. Read further to get insight into the details.
Engine Power or Horsepower
Engine power (or horsepower) can be estimated quite well using vehicle speed and its change over very short period of time. The total weight of the vehicle is also needed for valid results.
OBD Auto Doctor measures the engine power at the wheels. This is not the same as at the flywheel. Therefore, if the vehicle speed doesn’t change, the power will show zero. The horsepower will be greater than zero only when the vehicle is accelerating.
The software will also take power loss due to drag into consideration when calculating the power. An average drag coefficient and vehicle frontal area are used.
You can set the vehicle weight in the app settings. To get the most accurate weight, drive your car to a weightbridge. You could also estimate the total weight by using manufacturer defined weight added with the passenger weight, fuel weight plus any extra weight included in the vehile.
Torque is calculated from the engine power and RPM. With these two pieces of information, the torque can be estimated quite accurately. Torque is measured at the wheels just like the engine power.
Since torque is using engine power for the calculation, the vehicle weight is a factor in the calculation. Remember to set the correct weight!
Boost pressure value yields from the intake manifold absolute pressure. Barometric pressure is also taken into consideration. Now, the vehicle is required to support MAP (manifold absolute pressure) in order for the boost pressure to appear as supported. Barometric pressure is optional. The default pressure value at sea level is used unless the car provides support for the actual barometric pressure.
Negative pressure values represent vacuum. Positive values are boosted by a turbocharger or supercharger.
Among the new calculated performance parameters, we also added more.
The software has now support for all Mode $06 scaling IDs. The latest OBD2 standard version added 12 new identifiers. OBD Auto Doctor implements now all the new IDs in addition to the old ones.
If you are using the desktop software, download the latest version from the download page. The updated mobile apps can be found from the approriate app stores using your phone.
OBD2 Trouble Codes or Diagnostic Trouble Codes are defined by SAE (Society of Automobile Engineers). SAE is the organization that specifies the OBD2 standards. These include the one that defines all the generic Diagnostic Trouble Codes (DTCs). Car manufacturers follow these definitions when they assign DTCs for detected errors.
J2012 is the document that defines the OBD2 Trouble Codes. The standard hasn’t been updated for a while but few months ago it got a new revision. The newest revision contained a bunch of new DTCs. These DTCs take new technology such as hybrid vehicles into better consideration, for example.
OBD Auto Doctor contains now all the possible generic OBD2 Trouble Codes that exists. We added total of 3899 new DTCs to the software.
The software contains total of 18193 Trouble Codes. The latest PC & Mac software as well as the Android and iOS apps have all these codes included.
The codes include:
Powertrain: 6631 codes
Network & Vehicle Integration: 1017 codes
Chassis: 363 codes
Body: 165 codes
Rest of the codes are manufacturer specific trouble codes
Multiple Freeze Frames
The latest desktop software version added support for multiple Freeze Frames too. Typically, only one freeze frame is saved. But with newer cars, it’s possible to store multiple freeze frames; one for each trouble code. The software will now read all available frames.
This is a great addition if the vehicle has more than one issue present. You get details from each issue, not only the first one.
Our OBD app for iPhone has been a great success this far. We’ve got some improvement ideas from you guys about making it even better. We listened to your suggestions and made the app stand out even more.
The initial app used side navigation drawer as the navigation pattern. For the new version we redesigned the app navigation completely. We replaced the old side navigation with much simpler and intuitive tab bar navigation. Now all the most common sections are always visible at the bottom of the screen.
Our e-mail support was also contacted about how to reset the check engine light. The action to clear the MIL was behind a button that perhaps wasn’t the easiest to find. We improved the views so that the button to clear the MIL and trouble codes is now always visible.
As one of the new features, we added digital dashboard or so called status view to the app. With this view you can track the sensors you want in real-time and with large and easy to read fonts. The speed and RPM are the only fixed sensors in the screen. You can customise all other sensors. Long press any “sensor box” to replace a sensor with any sensor that your car supports .
On-Board Diagnostic Monitors (OBD MODE 06)
Another new feature that we added was the support for On-Board Diagnostic Monitors. These monitors are also know as the OBD mode 06. On-Board Diagnostic Monitors offer professional level diagnostic capabilities. These monitors can give detailed information about misfire counts, for example. They can also give reasons for readiness monitor failures or hints for emerging problems. Unfortunately, not all cars support this mode. Especially older cars don’t have support for it. That’s because Mode 06 was added to the OBD2 standard about ten years ago.
We are also happy to announce that the app supports now Bluetooth Low Energy (BLE) OBD adapters. These adapters are also known as Bluetooth Smart or Bluetooth 4.0 adapters. We started with support for the best BLE adapter in the market, Kiwi 3. Bluetooth adapters are much more convenient than WiFi adapters. This is because you don’t need to hassle with the phone WiFi connection anymore. Support for Bluetooth 4.x adapters is a great addition to our app. We’ll be adding support for more BLE adapters once they enter the market. Check the OBD adapters page for up-to-date information.
Drop us a note to email or add comment below about how you find the new app. Thanks!
OBD Auto Doctor OBD2 app for iPhone is now available from the Apple app store!
The app works now perfectly even with the new iOS 8 released just few weeks ago. The very first version of the app had some layout issues with iOS 8 but now all those issues are gone. The app works fine with iOS 7 too but older versions are not supported.
The iPhone version of the app requires separate ELM based OBD adapter using Wi-Fi connectivity. Due to technical limitations of the platform Bluetooth adapters can’t be supported. To get started with the app and adapter setup, please check the Quick Start Guide for iPhone. It will guide you through the first time usage.
The basic app is available for free so that you can evaluate it and make sure it works with your car and OBD-II adapter. The free app has some limitations though. You can unleash all the features and upgrade to the Pro version using in-app purchase. In-app purchasing is convenient way to unlock the Pro features without need to re-install separate app version.
Upgrading to the Pro
Getting the Pro version can be done inside the app using in-app purchase. It’s one time purchase that covers all future feature updates and additions to the app. The purchase is tied to your Apple account. You can get the Pro version back even if you upgrade your phone or uninstall the app by accident. Just install the free app from the app store and it will automatically detect that you already own the Pro version. The only thing you have to do is use the same Apple account in your phone.
Unfortunately Apple doesn’t provide us means to issue refunds of the purchase. Therefore, please try the free version first to make sure there are no compatibility issues with your adapter or car. The issues are very rare but if the free version doesn’t work, the Pro version won’t make the situation any better.
OBD Auto Doctor is coming for iPhone soon! We are very excited about this announcement as we are expanding our OBD2 software to even bigger audience. iPhone will be great addition to our product family that already covers Android, Windows Phone, Windows, Mac OS X and Linux.
We have been busy and working hard the whole summer to implement the best user experience for the app. We hope you like the app or send us feedback on the areas needing improvement. The app will require iOS 7.0 or newer to function. Earlier iOS version are not supported at the moment.
The app release will be announced separately but we are targeting September for the release. The app is basically ready by now but we still want to tweak the user interface and functionality to make it even better. If you want to be part of the early adopters and help us, please join our beta testing group by sending us email to firstname.lastname@example.org.
Here are couple of screenshots of the app. We are very excited about it, how about you?