The system detects tire inflation pressure loss on the basis of rotation speed differences between the individual wheels while driving.
In the event of a tire inflation pressure loss, the diameter and therefore the rotational speed of the corresponding wheel changes. This will be detected and reported as a flat tire.
The system does not measure the actual inflation pressure in the tires.
Functional requirements
The system must have been initialized when the tire inflation pressure was correct; otherwise, reliable flagging of a flat tire is not assured.
Initialize the system after each correction of the tire inflation pressure and after every tire or wheel change.
Status display
The current status of the Flat Tire Monitor can be displayed on the Control Display, e.g., whether or not the FTM is active.
1. "Vehicle info"
2. "Vehicle status"
3. "Flat Tire Monitor (FTM)"
The status is displayed.
BMW X3 Service & Repair Manual > Heater with operation: Replacing servodrive for footwell flap (automatic a/c)
Necessary preliminary work:
Remove RIGHT GLOVE BOX WITH HOUSING
Release screws (1).
Detach actuator drive for footwell flap (2).
Release plug connection (3) and disconnect.
IMPORTANT:
Servomotors must be readdressed in the event of replacement!
Addressing can only be carried o ...