Pressure Sensor - Audi 100 1991 Repair Manual

Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
1.20.1 Tire Pressure Monitoring System, with

Pressure Sensor

WARNING
If tire sealant was used, then the wheel electronics on that par‐
ticular wheel must be replaced.
The wheel electronics, that is, the system pressure sensor, forms
a physical unit with the valve.
Currently there are 2 versions of the wheel electronics.
Beru TPMS, refer to
⇒ "5.3 Wheel Electronics, TPMS, Beru System", page 92
Siemens TPMS, refer to
⇒ "5.4 Wheel Electronics, TPMS, Siemens System", page 92
Overview, Beru System
The pressure sensor transfers the recorded signals to the tire
pressure monitoring system antenna.
The pressure sensor is connected firmly to the rim with a threaded
connection.
If the tire pressure drops, the driver is warned via the pressure
sensor in the instrument cluster.
Tire Pressure Monitoring System
To inform the driver, this system transfers the tire pressure values
via a control module to the driver information system in the in‐
strument cluster.
Note
If vehicles with tire pressure monitoring sensors are transpor‐
♦
ted in airplanes, the airline must be informed of the sensors.
The correct allocation must be observed, otherwise the tire
♦
pressure monitoring will not function correctly.
More detailed information on this system can be found in SSP 219
"Electronic tire pressure monitoring".
1.20.2 Tire Pressure Monitoring System, with
Wheel Speed Sensor
Note
If the vehicle has TPMS, there are no wheel electronics in the rim.
When the tire pressure decreases, the speed of the respective
tire changes.
The changed tire speed is recorded by the speed sensor.
The driver is informed of the changed tire pressure in the instru‐
ment cluster.
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Wheel and Tire Guide - Edition 11.2010
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1. General Information