Reset Procedure

Flat Tire Monitor

The Concept
The Flat Tire Monitor keeps track of the inflation pressures in the four fitted tires as you drive. The system provides an alert whenever the inflation pressure drops significantly in relation to the pressure another tire.

The check of the tire inflation pressure is based on monitoring the relative speeds of the wheels. A flat tire is detected and reported on the basis of a deviation in certain speed ratios.

Functional Requirement
So that the Flat Tire Monitor can learn the correct inflation pressure, please perform the following:
1. Check the inflation pressures in all tires.
2. Compare with the recommended inflation pressure and correct if necessary.
3. Initialize the system.

Limits of the System
The Flat Tire Monitor cannot indicate sudden severe tire damage caused by outside factors and does not detect a natural, even pressure drop in all four tires.

In the following situations, on the other hand, there can be delays in detecting tire pressure losses, and even system failure:
- When driving on snow-covered or slippery road surfaces.
- In the case of performance-oriented driving: slip on the drive wheels, high lateral acceleration.
- False alarms and undetected loss of pressure may occur when you are driving with snow chains fitted.
- When driving with a compact wheel, the Flat Tire Monitor cannot operate.

Initializing the System
Perform the initialization immediately every time you correct the inflation pressure, change a tire or change a wheel or all wheels. A drive is required for this purpose.
1. Before the start of driving, start the engine, but do not drive off






2. Press the button until the yellow warning lamp in the instrument cluster lights up for a few seconds.
3. Drive off.

It takes a few minutes until the Flat Tire Monitor can detect and indicated a flat tire. Do not initialize the system when driving with snow chains or with a compact wheel.

Flat Tire Indicator Lamp
The symbol in the instrument cluster lights up in yellow.
1. Reduce speed and stop the vehicle carefully. Avoid sudden braking and steering maneuvers.
2. Identify damaged tire.
3. Replace the damaged tire.


NHTSA/FMVSS-required explanation of 138 Tire Pressure Monitoring System

ALLDATA Editor's Note: The explanation first appears in the model year 2007 owners manual. For the text of the explanation, please refer to 2007 or later.