TPM [RDK] control unit, component description - GF40.15-P-5123GMA

MODEL 164.1, 251.0/1 with CODE (475) Tire pressure monitor (premium) as of Model Year 2010/Modification year 09, Fa. Schrader

MODEL 164.8 with CODE (475) Tire pressure monitor (premium) as of Model Year 2010/Modification year 09 model refinement package, Fa. Schrader

Shown on model 164.1

Fig 1: Identifying TPM (RDK) Control Unit Component - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

Location

The TPM [RDK] control unit is located on the left side of vehicle on the underfloor in the area of the rear axle differential.

Task

Reading in of sensors and signals

The input factors are read in with the following connections:

Two-way radio

The following sensors are read in via radio:

Engine compartment CAN

The TPM control unit is a subscriber on the engine compartment CAN and communicates the associated messages with the following control units:

Instrument cluster (A1):
- Vehicle speed signal
AAC [KLA] control and operating unit (N22), except code (581) Comfort automatic air conditioning:
- Outside temperature from outside temperature indicator temperature sensor (B14)
Comfort AAC control and operating unit (N22/7), with code (581) Comfort automatic air conditioning:
- Outside temperature from outside temperature indicator temperature sensor
Central gateway control unit (N93):
- Special equipment (SA) coding

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.

Component actuation

The actuation of the components takes place via the following connections:

Engine compartment CAN

The TPM control unit is a subscriber on the engine compartment CAN and communicates the associated messages with the following control unit:

Design

The central antenna is integrated in the TPM control unit.

	Wiring diagram for tire pressure monitor control unit	Model 164	PE40.15-P-2101-99MAC
		Model 251	PE40.15-P-2101-99RAC