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

MODEL 221.0/1 with CODE (494) USA version as of Model Year 2009 up to Model Year 2010/modification year 08,/modification year 09 model refinement package, Siemens 

MODEL 221.0/1 with CODE (475) Tire pressure monitor (premium) as of Model Year 2009 up to Model Year 2010/modification year 08,/modification year 09 model refinement package, Siemens 

MODEL 216.3 with CODE (494) USA version as of Model Year 2009 up to Model Year 2010/modification year 08,/modification year 09, Siemens 

MODEL 216.3 with CODE (475) Tire pressure monitor (premium) as of Model Year 2009 up to Model Year 2010/modification year 08,/modification year 09, Siemens 

Shown on model 221.0 

Location 

The TPM [RDK] control unit is located in the passenger footwell.

Task 

The TPM [RDK] control unit has the following tasks:

• Reading in of sensors and signals 
• Evaluation of input factors 
• Actuation of components 

Reading in of sensors and signals 

The input factors are read in with the following connections:

• Direct line 
• Interior CAN (CAN B) 

Direct line 

The following signals are read in via a direct line: by the central TPM [RDK] antenna (A2/97):

• Absolute pressure in tire
• Acceleration
• Temperatures in the tires
• Identification number for wheel identifier

Interior CAN 

Signals are read in by the following control units via the interior CAN:

• Front SAM control unit with fuse and relay module (/) N10/1
  • Outside temperature
• EIS [EZS] control unit (N73)
  • Tml. 15 ON
• Central gateway control unit (N93)
  • Country code
  • Engine/body variant
  • Diagnosis active
  • Vehicle speed (from instrument cluster (A1))
  • Wheel speeds (from ESP control unit (N47-5))
  • Steering angle (from steering column tube module (N80))

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.

Actuation of components 

Components are actuated with the following line:

• Local Interconnect Network (LIN) 

LIN 

The following components are actuated via LIN:

Left front TPM [RDK] wheel antenna (A2/44)

Right front TPM [RDK] wheel antenna (A2/45)

	Wiring diagram for tire pressure monitor control unit	Model 216	PE40.15-P-2101-99CAA
		Model 221	PE40.15-P-2101-99SAA