Tire Pressure Module: Description and Operation

GF40.15-P-5124MCU Tire Pressure Monitor Control Unit, Component Description







N88 TPM [RDK] control unit

Location
The TPM [RDK] control unit is located in the footwell on the driver-side.

Task
The TPM [RDK] control unit realizes the following functions:
^ Tire pressure temperature compensation
^ Warning for pressure loss
^ Status monitoring

The TPM [RDK] control unit receives data telegrams via two-way radio from the following sensors:
^ Left front TPM [RDK] wheel sensor (A69/1)
^ Right front TPM [RDK] wheel sensor (A69/2)
^ Left rear tire pressure monitor sensor (A69/3)
^ Rear right tire pressure control wheel sensor (A69/4)
The data telegrams contain the pressure, tire pressure temperature, individual serial number and status information (manufacturer, direction of rotation, operating mode etc.).

If a pressure loss is detected, the tire pressure monitor warning lamp (A1e66) in the instrument cluster (A1) is actuated by the TPM [RDK] control unit.

The TPM [RDK] control unit constantly monitors all input signals and output signals for faults. Detected faults that are relevant to function are entered into the fault memory.

Discrete inputs
^ Circuit 30
^ Circuit 31

CAN signals
The TPM [RDK] control unit is connected to the Control Area Network (databus/CAN Bus) (CAN) for data exchange.