Tire Pressure Monitor Systems Audi A4 B8

MODEL COVERAGE

Models Covered

DESCRIPTION & OPERATION

Note. Whenever tire pressures are adjusted to be different than the previously stored pressures, the new pressures have to be stored. If wheels are rotated or changed, tire pressures must be stored. See RESET PROCEDURES .

Note. This vehicle is equipped with an Indirect TPM System. Vehicle IS NOT equipped with tire pressure sensors mounted on the wheels.

TIRE PRESSURE MONITOR (TPM) SYSTEM

Note. To ensue a proper TPMS function use Audi original tires, which are marked witheither "AO" or "RO" on the tire sidewall.

With the help of the ABS speed sensor, the tire pressure monitoring system compares both the rolling circumference and the vibration behavior of the individual wheels. The instrument cluster display shows if there are any changes to one or more wheels. If only one wheel is affected, the location of the wheel will be indicated.

The tire pressure monitoring system is a software module in the ABS/ESC control module for detecting slow losses of pressure at a wheel. With the help of the ABS speed sensors, the TPMS compares the speed and rolling circumference of the individuals wheels. If the rolling circumference of a wheel changes, the tire pressure monitoring display indicator lamp lights up in the instrument cluster.

The rolling circumference of the tire can change if

1. The tire pressure is too low.
2. The tire has structural damage.
3. The tire or the pressure was changed and the tire pressures were not saved.
4. The vehicle is loaded on one side.
5. The tires on one axle are loaded more heavily (e.g. when towing a trailer or driving up and down inclines).
6. Snow chains are installed.
7. The spare tire is installed.
8. One tire per axle was changed (or if the tires were rotated from front to back or the other way around).
9. The left and right wheels drive on different surfaces for an extended period of time.

TIRE PRESSURE MONITOR WARNING DISPLAY

The tire pressure monitoring display in the instrument cluster informs the driver if the tire pressure is too low or if there is a system malfunction.

If the indicator lamp blinks for approximately 1 minute after switching the ignition on and then stays on continuously, there is a system malfunction. "TPMS" is also displayed in the instrument cluster. A system malfunction is stored in the ABS/ESC control module and indicated by the yellow TPMS lamp in the instrument cluster.

RESET PROCEDURES

Note. Whenever tire pressures are adjusted to be different than the previously stored pressures, the new pressures have to be stored. If wheels are rotated or changed, tire pressures must be stored

STORING TIRE PRESSURES

The tire pressures must be saved in either the radio or MMI (depending on equipment) each time the tire pressure is adjusted or a tire is changed. Switch the ignition on, select the "CAR" function button and select the tire pressure monitoring system using the rotary switch on the multimedia control head knob and save the tire pressure by pressing the rotary knob. (Scheme 14)

1. Select: The CAR function button > TIRE PRESSURE MONITORING > STORE CURR. TIRE PRESSURES
2. Or
3. Select: The CAR SYSTEMS control button > TIRE PRESSURE MONITORING > STORE TIRE PRESSURES

Scheme 14

DISMOUNTING/MOUNTING PROCEDURES

Note. This vehicle is equipped with an Indirect TPM System. Vehicle IS NOT equipped with tire pressure sensors mounted on the wheels. No special procedures are required to service tires, as the TPM system does not use in-tire sensors. The tire pressure monitoring system is a software module in the ABS/ESP control module for detecting slow losses of pressure at a wheel.

Note. Whenever tire pressures are adjusted to be different than the previously stored pressures, the new pressures have to be stored. If wheels are rotated or changed, tire pressures must be stored. See RESET PROCEDURES .

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

See also:
• RESET PROCEDURES