MAF CAL Quick Start Guide – MAF Calibration
November 21, 2024This article is a quick start guide to the MAF CAL MAF calibration tool from MoviChip.
Confirm Installation is Correct
After the unit has been wired in to the car, these are the first steps to get up and running before starting the engine for the first time with the unit installed.
Bluetooth
Before installing the MAF CAL app, we first pair the MAF CAL with our Android device.
With this done, we download the MAF CAL app and install it.
With ignition on, engine off, we open the app we click the Bluetooth logo, find the MAF CAL from the list and click it.
The MAF CAL app will now be connected to the unit.
Check Wiring
To confirm there are no issues with the install we click Diagnostics. This will show us the sensor reading from our MAF sensor signal and also show us the output MAF signal voltage from the MAF CAL to the engine ECU as well as adjustment data.
The fields will not be updating at the same time so there should be some differences ie the adjustment percentage may look large. What we are looking for is for the readings to be updating with semi sensible values.
Assuming our wiring is okay we turn off the diagnostics and we can move on to calibrating/scaling our MAF sensor signal.
Adjusting Correction
By clicking the boxes across the top and then pressing the plus and minus buttons we can choose the percentage correction we want to add to the MAF signal for different MAF signal voltages.
It is entirely up to you want tuning process you want to use to find the MAF calibration you need.
Tune Function
Inside the Diagnostic function there is a “Tune” button. When this button is activated the only value that is updated is the MAF In voltage, the voltage from our MAF sensor.
By using the floating windows function in Android we can overlay our STFTs over the MAF In voltage to adjust our corrections in real time. Or alternatively record the screen with both variables showing and watch the video back later to see what adjustments need to be made.
This video shows how the Tune function can be used.
The corrections entered will be stored.
When connecting to the unit again in the future, clicking on the boxes will show the saved value.
NOTE: In normal use it is not necessary to connect and use the Android app. We only need the Android app when changing settings. At all other times no Android device is necessary, just get in the vehicle and go.
