GF54.21-P-6030FQ Rear SAM Control Unit With Fuse and Relay Module, Component Description

GF54.21-P-6030FQ Rear SAM Control Unit With Fuse and Relay Module, Component Description
MODEL 218





N10/2 Rear SAM control unit with fuse and relay module

Location
The rear SAM control unit is located at the right rear in the trunk.

Task
The rear SAM control unit has the following tasks:
^ Reading in of sensors, pickups and signals
^ Evaluation of input factors
^ Actuation of functions
^ Actuation of components
The fuse and relay module of the rear SAM control unit supplies various systems and control units with power through limit switches to match the function sequence.
The following tasks are the responsibility of the fuse and relay module:
^ Voltage supply to components
^ Power supply and relay switching
^ Switching consumers using relays
Detailed information is available in the "Fuse and relay box, as-built configuration" function description.

Reading in of sensors, pickups and signals
The input factors are read in via the following connections:
^ Direct line
^ Local Interconnect Network (LIN)
^ Interior CAN (CAN B)

Direct line
The signals from the following components are read via a direct line:
- Left rear door rotary tumbler switch (A85/3s1)
- Right rear door rotary tumbler switch (A85/4s1)
- Left fuel tank fill level indicator sensor (B4/1)
- Right fuel tank fill level indicator sensor (B4/2)
- Trunk lid/liftgate rotary tumbler switch (M14/7s1)
- With code (882) Interior monitoring (with ATA [EDW] only)
- Tow-away protection button (N70s9)
- With code (551) Antitheft alarm system (ATA) or with code (B03) ECO start/stop function:
- Left engine hood contact switch (S62/43)
- On model 218.3 with code (287) Through-loading feature or model 218.9:
- Left rear backrest inclination switch (S54/5)
- Right rear backrest inclination switch (S54/6)
- Left rear seat backrest lock switch (S54/7)
- Right rear backrest lock switch (S54/8)
- with code (889) Keyless-Go:
- Trunk lid/liftgate KEYLESS-GO button (S62/21)
- Left rear seat belt buckle switch (S68/5)
- Right rear seat belt buckle switch (S68/6)
- With code (887) Valet Parking:
- Trunk lid/liftgate contact switch (S88/6)
- Trunk lid/liftgate external operation switch (S88/8)
- On model 218.3 with code (494) USA version:
- Trunk lid emergency opening switch (S88/10)

LIN
The signals from the following components are read in via LIN:
- Over on-board electrical system-LIN (LIN B7):
- Battery sensor (B95)
- Over rear SAM-LIN (LIN B4):
- Alarm siren (H3/1) (with code (551) Antitheft alarm system (ATA [EDW]) and without code (494) USA version)
- Interior protection and tow-away protection control unit (N26/6) (with code (882) Interior monitoring (only with ATA))

Interior CAN
The signals are read in by the rear SAM control unit over the interior CAN.
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors
The input factors are evaluated by the microprocessor and the corresponding components are actuated.

Actuation of functions
- Battery state recognition
- Exterior lights (ABL) for vehicle rear
- Rear window defroster
- Central locking in rear area
- Heated seats (HS) (with code (873) front left and right heated seats)
- Electric seat ventilation (with code (401) Front comfort seats, incl. seat heating and seat ventilation)
- Antitheft alarm system (ATA [EDW]) (with code (551) Antitheft alarm system (ATA [EDW]))
- Trunk lid/liftgate control (on model 218.3 with code (881) Remote trunk closing (RTC) or model 218.9

Actuation of components
Components are actuated via the following lines:
^ Direct line
^ LIN
^ Interior CAN

Direct line
The following components are actuated via a direct line:
- Left rear lamp unit (E3)
- Rear fog lamp (E3/6) (without code (460) Canada and without code (494) USA version)
- Right rear lamp unit (E4)
- Right luggage compartment lamp (E18/4)
- Left luggage compartment lamp (E18/5)
- Left license plate lamp (E19/1)
- Right license plate lamp (E19/2)
- Center brake lamp (E21)
- Trunk lid/liftgate ambient lamp (E40) (model 218.3)
- Left trunk lid/liftgate ambient lamp and warning lamp (E40/2) (model 218.9)
- Right trunk lid/liftgate ambient lamp and warning lamp (E40/3) (model 218.9)
- Liftgate wiper motor (M6/4) (on model 218.9)
- Trunk lid/liftgate central locking motor (M14/7)
- Tank cap central locking actuator (M14/10)
- Trunk lid emergency opening switch illumination (S88/10) (on model 218.3 with code (494) USA version)
- Seat adjustment motor for left rear head restraint(M53/1)
- Seat adjustment motor for right rear head restraint (M53/2)
- Seat adjustment motor for center rear head restraint (M53/3)
- Rear window heater (R1)
- With code (401) Front deluxe seats, incl. seat heating and seat ventilation:
- Seat ventilation motors for left front seat cushion (M18/9)
- Seat ventilation motors for left front backrest (M18/10)
- Seat ventilation motors, right front seat cushion (M18/11)
- Seat ventilation motors, right front backrest (M18/12)
- With code (873) Heated seats, left and right front seat:
- Left front seat sitting surface heater pad (R13/1)
- Left front backrest heater pad (R13/2)
- Right front seat sitting surface heater pad (R13/3)
- Right front backrest heater pad (R13/4)

LIN
The following component is actuated via the rear SAM-LIN:
- Alarm siren (with code (551) Antitheft alarm system (ATA [EDW]) and without code (494) USA version)

Interior CAN
The signals are sent over the interior CAN by the rear SAM control unit.
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).