The Overview The VSA modulator-control unit detects a state that the pressure of one tyre is relatively lower than pressure of the other three tyres. Deflation detection is performed by monitoring the rotation speed of four wheels.When the system detects the deflation of a tyre (from 10 % to 30 % deflation from recommended pressure), the low tyre pressure indicator is turned on to inform the driver that a tyre is deflated Deflation of two tyres on diagonal position or three tyres are also detectable.To detect tyre deflation with desired accuracy, it is necessary to learn the difference of rolling of the four tyres at recommended pressure (learning is started by initialisation). DWS Learning To detect a tyre deflation, it is necessary to correct the initial difference of rolling radius of the four tyres at recommended pressure. This leaning is finished by drive the vehicle for about 10 minutes in ideal conditions. In addition, the true performance is not provided while learn it. Deflation Warning System DWS Initialisation You can do this prior to engaging your dealer Do the deflation warning system initialisation after doing the following items. • Rotating the tyres. • Replacing the tyre(s). • Adjust the tyre pressure. • Replace the VSA modulator-control unit. Turn the ignition switch to ON (II). NOTE: Vehicle must be stopped with the transmission in P or N. Press and hold the INFO button (A) for more than 3 seconds to enter the customizing mode. Press the INFO button repeatedly until symbol (B) is displayed, then press the SEL/RESET button (C). Select ‘‘OK’’ by pressing the INFO button, then press the SEL/RESET button to set. NOTE: • If ‘‘COMPLETE’’ is displayed in the multi-information display, deflation warning system learning procedure is completed. • If ‘‘FAILED’’ is displayed in the multi-information display, go to the symptom troubleshooting. DWS Components and Schematics ( please note 3rd Generation is shown but the principle is the same on the 4th Generation) If you have any issues on Civic or CR-V refer to this thread first or open a new thread in the respective forum sections.