WSS (Weight Sensing System) control unit, component description - GF91.60-P-4046GMU

MODEL 164.1 as of model year 09/YoM 08 model refinement package with CODE (494) USA version 

MODEL 164.8, 251.0/1 as of model year 09/YoM 08 with CODE (494) USA version 

Location 

The WSS control unit is located in the seat frame of the front passenger seat.

Task 

The WSS control unit has the following tasks:

• Reading in of sensors, pickups and signals 
• Evaluation of input factors 
• Display of information 

Reading in of sensors, pickups and signals 

The input factors are read in via the following connection:

• Direct line 

Direct line 

The following components and signals are read in over a direct line:

• Circuit 30
• Circuit 31
• Left front WSS sensor (Weight Sensing System) (B48/11)
• Right front WSS sensor (Weight Sensing System) (B48/12)
• Left rear WSS sensor (Weight Sensing System) (B48/13)
• Right rear WSS (Weight Sensing System) sensor (B48/14)

The voltage supply to the WSS sensors is activated via a direct line by the WSS control unit.

Evaluation of input factors 

The WSS control unit measures the weight (person or child seat) on the front passenger seat using the WSS sensors on the seat frame. The WSS control unit performs a classification of the weight on the seat based on the measured sensor valves.

Display of information 

Information is issued via the following connection:

• Interior CAN 

Interior CAN 

The WSS control unit sends the information via the interior CAN to the central gateway control unit (N93).

The central gateway control unit routes the data via the engine compartment CAN to the restraint system control unit (N2/7).

	Wiring diagram for Weight Sensing System (WSS) control unit	Model 164	PE91.60-P-2102-99MAA
		Model 251	PE91.60-P-2102-99RAA