ML 550 (164.172) V8-5.5L (273.963) (2009)
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Seat Belt Control Module: Description and Operation
GF91.60-P-4048GM Restraint Systems Control Unit, Component Description
Component Identification
Location
The restraint systems control unit is located on the center tunnel between the front seats.
Task
The restraint systems control unit has the following tasks:
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Reading in signals and sensors
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Evaluation of input factors
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Actuation of components
Reading in signals and sensors
The input factors are read in with the following connections:
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Direct line
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Engine compartment CAN
Direct line
The following signals and sensors are read via a direct line:
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Circuit 15R
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Circuit 30
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Circuit 31
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Drive sidebag sensor (A53)
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Front passenger sidebag sensor (A54)
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Front passenger seat occupied and child seat recognition sensor (B48) (with code (U18) Automatic child seat recognition (ACSR [AKSE]))
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Driver-side frontal acceleration sensor (B48/1)
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Passenger-side frontal acceleration sensor (B48/2)
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Driver door pressure sensor (B48/7)
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Front passenger door pressure sensor (B48/8)
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Rear door pressure sensor, driver-side (B48/9) (with code (293) Left and right rear sidebag)
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Rear door pressure sensor, passenger-side (B48/10) (with code (293) Left and right rear sidebag)
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Driver seat belt buckle and seat belt warning switch (S68/1)
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Front passenger seat belt buckle and seat belt warning switch (S68/2)
Engine compartment CAN
The following signals are read in over the engine compartment CAN: by the central gateway control unit (N93):
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Status of seat occupied recognition from Weight Sensing System (WSS) control unit (N2/13) (with code (494) USA version)
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 lines:
