Tire Pressure Monitoring System, Indirect

Tire Pressure Monitoring System, Indirect

General Information

The tire pressure monitoring indicator system is a component of software in ABS control module (J104). The system will recognize a slow and gradual decrease in tire pressure on a wheel. DTC entries for tire pressure monitoring are stored in the ABS control module. With the help of the ABS sensors, 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

If the rolling circumference of a wheel changes, the tire pressure monitoring display indicator lamp (K220) lights up in the instrument cluster. Rolling circumference of a tire may change due to:

• Insufficient tire pressure

• Structural damage on tires

• Load on vehicle on one side

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

• When snow chains are used

• When spare wheel is installed

• One wheel is replaced

System malfunction in ABS 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 (K220) - arrow - will also illuminate. A malfunction in the TPMS will not be stored in the system.





Indicator lamp cannot be turned off by pressing tire pressure monitoring display button (E492). In this case, perform the following steps:

- Connect diagnostic operation system (VAS 5051 ) and select Guided Fault Finding.

Suspension

Brake System

Anti-Lock Brake System ABS/ASR Mark 70 or Anti-Lock Brake System ABS/EDS/ASR/ESP Mark 60 EC

Function

Check Tire Pressure Monitoring Display / Tire Pressure Warning

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

Performing basic setting

After every change at wheels, the button SET - 2 - must be pressed with ignition switched on and vehicle standing still until a signal tone sounds. The signal tone confirms the basic setting.