LAUNCH X431 diagnostic tool offer numerous special functions. This guide demonstrates how to use the Window Initialization function, which resolves issues with windows or the sunroof that cannot operate properly by resetting the basic settings.
Test Model:
2018 Audi A4L
Fault Description:
The one-touch window lift function on the Audi A4L is inoperative.
The fault code displayed is:
B148754 (Window Regulator Motor—No Basic Settings)
Using the Window Initialization function helps reset the settings to restore functionality.
Supported Devices:
X431 919E / X431 919X / X431 CRP919E BT / X431 CRP919X BT
X431 PROS V / X431 V+ / X431 PRO ELITE / Pros Elite / X431 V
X431 PRO3S+ / Pro3 ACE / Pro3 APEX
X431 PRO5 / X431 PAD V / X431 PAD VII
And most other X431 diagnostic devices.
Step-by-Step Operation Process:
Select “42 Door Electronics Driver Side”.
Click “OK” to proceed.
Choose “02 Read DTC”.
The fault code displayed is: B148754 (Window Regulator Motor—No Basic Settings).
The fault is active/static and cannot be cleared at this point.
Select “04 Basic Settings”.
View the function list and choose “Front Window Regulator, Driver Side”.
Click the “Adjust” button to begin the basic settings.
The system runs the basic settings process.
Confirm that the fault code status changes from “Active/Static” to “Passive/Abiogenesis”.
Click “Yes” to clear the fault code.
Select “02 Read DTC” again to verify.
Ensure no fault codes remain in the system.
Confirm that the window’s one-touch regulator function is restored.