GF40.15-P-5125TXE Wheel Antenna, Component Description

GF40.15-P-5125TXE Wheel antenna, component description
- with CODE (475) Tire pressure monitor II
- except CODE (494) USA version
- except CODE (498) Japan version

Component Identification:

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

The central TPM [RDK] antenna 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 TPM [RDK] 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.