How to: use Auto Tune Basic with Dynojet PV3

Dynojet PV3 for Harley Davidson now includes on-device Auto Tune which uses the factory O2 sensors to generate tune corrections. This is a very effective way to fine tune your calibration based on actual running conditions. Auto Tune Basic works by using the PV3 device to process closed loop data from the factory O2 sensors and in turn generates tune corrections to the VE tables necessary to meet the target AFR, not only can it fix the normal closed loop range, but AT Basic mode also temporarily extends the closed loop range to populate corrections to the VE tables over a wider operating area.

PV3’s version of AT Basic has been refined from the original Power Vision using more advanced filters and logic, and its easier to use than ever. Once AT Basic is enabled you will essentially start & ride the bike as normal, upon starting you will get a note Auto Tune is logging and it will go to the gauge screen and will display AT in the upper left, when conditions are met to generate correction data you will see a smiley face in the upper left (or any codes such at engine temp low etc..). We generally recommend running Auto Tune sessions in 20 minute intervals of mixed riding. Between each session you can “Apply Values” which will apply the corrections back to the base tune making each session more accurate. Once finished tuning there are two steps; you will first Apply Values and secondly Disable Auto Tune, this will fully update your tune with the corrections and flash it to your ECM; you are then ready to ride and test your new tune. It also will place the new tune on the device which will have “_AT” after the title numbered in sequence, you can also verify which tune is flashed to your ECM by * next to the title.

Note: Auto Tune Basic requires PV3 firmware version 3.7.8263.23514 or later. Update your PV3 device as necessary using the Dynojet Power Core software, go to the splash screen and select Tools>Manage Hardware, or view the Fuel Moto instructions

Here are instructions & screenshots:

From the main menu navigate to the Tuning screen


Select Auto Tune


Enable Auto Tune


Select AT Basic


Press Select to choose the current tune that is in your bike, or you can use the back button to select a different tune from the tune manager


You can now start your bike and ride it, note the AT indicator in the upper left of the screen as well as the smiley face indication that Auto Tune is collecting data & generating corrections, note the engine will need to be up to operating temp and other conditions must be met for AT to generate corrections. You do not need to go to any specific screen or do anything at this time other than ride the bike as normal, also note if you have not configured the gauge screen the channels will be blank. You can configure gauges from the device tools screen if desired.


When you are ready to apply the AT corrections to your tune you will go to Auto Tune>Apply Values and this will apply any learned corrections to your base map. It is also helpful between Auto Tune sessions to Apply Values, this will apply the learned corrections and make your next AT session more accurate, it and will speed the tuning process. Note: when you Apply Values the ECM will continue to be in AT Basic mode.


Final Step: When finished with the Auto Tune process and you want to finalize your tune there are two steps. 1) Apply Values as shown above, 2) Disable Auto Tune. This will return the ECM to normal running state and update it with the new corrected tune. IMPORTANT NOTE: be sure to Apply Values first before disabling Auto Tune, if you disable Auto Tune without applying values it will not apply any learned corrections.


After you select Disable Auto Tune it will reflash your ECM with the update tune and you will turn the ignition off for 10 seconds


The new tune you created with Auto Tune will be stored in the tune manager, you can also verify which tune is in the ECM by the * next to the title


Additional Notes:

If you want to view the learned corrections you will open the base map and the Auto Tune generated map in the Dynojet Power Core software, right click and select compare tunes. This will allow you to see the specific delta’s and you can also make any additional desired tune changes at that time, you can also very easily revert the Auto Tune generated edits back as well.

Auto Tune Basic is an application designed to populate maximum data for tune correction, because various tables are changed and features are altered to better permit data collection it is not recommended to run in Auto Tune Basic mode full time. When you are not doing an Auto Tune run session or when your tune is finished you will flash the final map and the ECM will operate normally.

When collecting data in high RPM & high load areas it is necessary to use caution and it is also important to have the appropriate base map for your application. AT Basic only makes corrections on the fuel side, it does not generate ignition timing corrections. Its also important to note due to limitations AT Basic is not designed to build out full tunes for highly modified engines. Again, having an accurate base map will speed the tuning process considerably. Tuning engines takes some understanding of basic principles and a willingness to learn, we are happy to help however if you feel this process is outside your scope we recommend using a qualified dyno tuner that is proficient in tuning with these specific products.

Note: Auto Tune Basic requires PV3 firmware version 3.7.8263.23514 or later. Update your PV3 device as necessary using the Dynojet Power Core software, go to the splash screen and select Tools>Manage Hardware, or view the Fuel Moto instructions