Wheel antenna, component description - GF40.15-P-5125TR

MODEL 211 as of 1.6.05

with CODE (475) Tire pressure monitor II

except CODE (494) USA version

except CODE (498) Japan version

MODEL 211 as of 1.7.05

with CODE (475) Tire pressure monitor II

except CODE (494) USA version

except CODE (498) Japan version

Fig 1: Identifying Left And Right TPM Wheel Antenna And Central TPM Antenna

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The left front and right front TPM [RDK] wheel antennae are fitted in the front wheelhouses.

The central TPM [RDK] antenna (A2/97) is fitted to the left-hand side of the vehicle underfloor under the rear seats.

Left front and right front TPM [RDK] wheel antennae

Task

The left front and right front TPM [RDK] wheel antennae each transmit a trigger signal when prompted to by the TPM [RDK] control unit (N88). These trigger signals received by the TPM [RDK] control unit are used to localize the front wheels and enable wheel-specific pressures to be displayed.

Function

The left front and right front TPM [RDK] wheel antennae are prompted by the TPM [RDK] control unit via a LIN bus to transmit a trigger signal. As a result of the spatial location only one TPM wheel sensor can ever be prompted by a trigger to place the "trigger bit".

Central TPM [RDK] antenna

Task

The central antenna receives the following information from the left front TPM [RDK] wheel sensor (A69/1), the right front TPM [RDK] wheel sensor (A69/2), the left rear TPM [RDK] wheel sensor (A69/3) and the right rear TPM [RDK] wheel sensor (A69/4):

The absolute pressures in the tires
The acceleration
The temperatures at the individual TPM wheel sensors
ID to identify the wheel

Function

The information transmitted by radio signal is supplied to the TPM [RDK] control unit over a discrete cable.