Data logging records live values from your ECU, such as engine speed, temperatures and fuel trims, so you or your tuner can look at how the vehicle behaves. To start, connect to your vehicle (see Vehicle Connect), then open Vehicle Connect and choose Data Logging.
If the ECU doesn't offer any channels to log, the page shows Logging not supported.
On an Isuzu, the first time you open Data Logging after connecting, EasyTune asks the ECU which values it can report. This takes a few seconds, and happens again each time you reconnect.
Click Logging Setup to open Select Data Channels. Channels are grouped (for example by system), and you tick each one you want to record. Use the search box to find a channel by name.
.etjson file. Import Config loads one back, for example on another computer.Click Finish when you're done.
Click Live Viewer Setup to choose how the logged channels are drawn while you record. For each channel you can set:
The buttons along the top apply to every channel: Auto Min/Max All, Reset Charts (moves every channel back to Chart 1), Regen Colors and Select Default. Click Done to close.
The cog button holds three more settings:
When you stop, the Data Log window opens with the recording. The keyboard shortcuts don't work while a setup window is open; the i button next to View Previous lists them.
If an error occurs while you are recording, logging stops and a !! marker is placed where it happened. Leaving the Data Logging page while recording also stops the log; the app shows Datalogging Closed and opens what was recorded.
A new log is only held in the app until you save or download it. View Previous reopens the most recent log while you stay on the Data Logging page.
From the Data Log window:
A downloaded CSV starts with an EasyTune header block that holds the vehicle and ECU details and the channel settings. Below that is a timestamp column, in seconds from the first sample, and one column per channel with its unit in the heading.
Saved logs are listed under Data Logs in the sidebar, or from the View All Data Logs button on the Data Logging page. The Vehicles panel groups logs by VIN; choose All Logs to see everything. Click a log to open it, or tick several and click Delete to remove them.
To open a log file from your computer, click Upload Data Log on the Data Logs page, or drag the file onto that button. It reads CSV files exported from EasyTune, and CSV logs from HP Tuners and Techstream. The file opens in the viewer; it isn't added to your account.
A log has four tabs.
The Inspector compares the lowest and highest value of each channel in the log with that channel's warning and severe limits, where the log includes them. Each channel is listed under one heading:
If anything is listed under Critical or Warning, stop driving hard and send the log to your tuner.
The chart draws the log with the same channel options as the live chart, set from Data Setup. Drag across the chart, or scroll, to zoom into a stretch of time. The strip below the chart shows the whole log; drag its highlighted window to move along it. Reset Zoom shows the whole log again.
The cog button turns Smoothing on or off, and has Export Config and Import Config for saving and loading the chart setup as a .etjson file. A config exported from the Data Logging page can be imported here.
The histogram shows where the engine spent its time. Click Data Setup and choose a channel for each of the X, Y and Z axes. Each cell of the grid covers a range of X and Y values and shows the Z value recorded there. The cell colour shows how many samples fell into it; hover over a cell for the count.
Display Setup sets the grid size, the X and Y axis ranges, the colours, whether cells show the Mean Value, Maximum Value or Minimum Value of Z, and Flip X and Flip Y. Scatter Plot draws every sample as a point instead of a grid.
Metadata shows the vehicle and ECU details captured when the log was recorded, such as the VIN, calibration ID, hardware ID, CVN, flash count and programmer's comment. The Notes box is for your own comments; on a saved log, notes are saved as you type.