Component description for front reversible emergency tensioning retractors - GF91.40-P-4020GM

MODEL 164.1 as of model year 2009/YoM 08 model refinement package 

MODEL 164.8, 251.0/1 as of model year 2009/YoM 08 

Shown on model 164.1 

Location 

The reversible emergency tensioning retractors are located in the respective B-pillar.

Task 

The reversible emergency tensioning retractors perform the following tasks:

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

Reading in of signals 

The input factors are read in via the following connections:

• Direct line 
• Engine compartment CAN (CAN C) 

Direct line 

The following signals are read in via a direct line:

• Circuit 30
• Circuit 31

Engine compartment CAN 

The following signals are read in over the engine compartment CAN:

• Information about the vehicle dynamics situation from the ESP control unit (N47-5) (except model 164.195) or the regenerative braking system control unit (N30/6) (with model 164.195)
• Steering angle from steering column tube module (N80)
• Status of front seat belt buckles from restraint systems control unit (N2/7)

Evaluation of input factors 

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

Actuation of components 

Components are actuated via the following lines:

• Direct line 
• Engine compartment CAN 

Direct line 

The internal actuators for seat belt tensioning are activated via a direct line.

Engine compartment CAN 

The PRE-SAFE request is output to the central gateway control unit (N93) via the engine compartment CAN.

	Wiring diagram, reversible emergency tensioning retractor	Model 164	PE91.40-P-2200-97MAA
		Model 251	PE91.40-P-2200-97RAA