CL 550 4MATIC (216.386) V8-5.5L (273.961) (2009)
Body Control Module: Description and Operation
GF54.21-P-6030LE Rear SAM Control Unit With Fuse and Relay Module, Component Description
GF54.21-P-6030LE Rear SAM Control Unit With Fuse And Relay Module, Component Description
Component Identification
Location
The rear SAM control unit is located in the luggage compartment, on the partition wall to the passenger compartment.
Task
The rear SAM control unit has the following tasks:
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Reading in of sensors, pickups and signals
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Evaluation of input factors
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Control of systems
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Actuating components
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Voltage supply to components
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Switching consumers using relays
Reading in of sensors, pickups and signals
The input factors are read in with the following connections:
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Direct line
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Interior CAN (CAN B)
Direct line
The signals from the following components are read via direct lines:
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Fuel level sensor, left half of tank (B4/1)
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Fuel level sensor, right half of tank (B4/2)
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Trunk lid gearing microswitch 2 (M14/7s1)
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Trunk lid lock pawl microswitch (M14/7s2)
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Rear roller blind motor Hall sensors (M24) (with code (540) Electric rear window roller blind)
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Right rear brake pad contact sensor (S10/4)
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ATA [EDW] engine hood switch (S62) (with code (551) Antitheft alarm system (ATA [EDW])
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Left rear seat belt buckle switch (S68/11) (model 221, model 216 with code (435) Folding head restraints in rear compartment)
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Right rear seat belt buckle switch (S68/12) (model 221, model 216 with code (435) Folding head restraints in rear compartment)
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Center rear seat belt buckle switch (S68/14) (model 221 without code (223) Rear bench seat with electrically adjustable outer seats with
PRE-SAFE positioning function for outer seats and outer head restraints)
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Trunk lid contact switch (S88/6) (with code (494) USA version)
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Trunk lid external operation switch (S88/8)
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Trunk lid emergency release switch (S88/10)) (for code (494) USA version)
Interior CAN
The signals are read in by the rear SAM control unit over the interior CAN.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).
Evaluation of input factors