Tire Monitoring System: Description and Operation

Tire Pressure Monitoring System

General Information

The tire pressure monitoring system is included in the software in the ABC control module (J104). The system will recognize a slow and gradual decrease in tire pressure on a wheel. DTC memory faults for tire pressure monitoring are stored in the ABS control module. With the help of the ABS speed sensor, the TPMS compares the speed and rolling circumference of the individuals wheels.

After the following work and/or changes and with the ignition switched on, the Tire Pressure Monitoring Display Button (E492) must be pressed until the confirmation chime sounds:

• Tire pressure change.

• A change in one or more tires.

• Changing a tire, for example, from front to rear.

• Removing or installing one or multiple tires.

If a tire has changed in circumference, the tire pressure monitoring display indicator lamp (K220) in the instrument cluster will come on. Rolling circumference of a tire may change due to:

• insufficient tire pressure

• Structural damage on tires

• Vehicle is loaded heavily on one side

• high load on one axle, when towing trailer for example

• when snow chains are used

• Spare wheel is mounted

• one wheel is replaced

System Malfunction in the Anti-Lock Braking System

If the ASR/ESP control lamp (K155) or the traction control indicator lamp (K86) indicate a malfunction in the ABS system, then the tire pressure monitoring display indicator lamp - arrow - will also illuminate. A malfunction in the tire pressure monitoring system has not been stored.






Indicator lamp cannot be turned off by pressing tire pressure monitoring display button. In this case, perform the following:

- Connect the Vehicle Diagnostic Tester and select "Guided Fault Finding".

Chassis

Brake System

01-OBD

03-Brake System ABS Mark 70 or

03-Brake System ESP Mark 60

Functions

General Functions

Adapt the tire pressure monitoring system

Follow the instructions on the screen to perform the basic setting.

Perform the Basic Setting

After every change at wheels, the button SET - 1 - must be pressed with ignition switched on and vehicle standing still until a signal tone sounds. The signal tone confirms the basic setting.






• The SET - 1 - button in inside the glove compartment.