Component description for rear SAM control unit - GF54.21-P-7030RF
Model 205, 253
Shown: Model 205.0
Location
The rear SAM control unit is located in the right of the trunk beneath the cover.
Task
Depending on the function sequence the rear SAM control unit supplies various systems and control units with voltage via limit switches. In addition, the rear SAM control unit has the following tasks:
- Reading in of sensors and signals
- Evaluation of input factors
- Controlling functions
- Actuation of components
- Switching of relays
Reading in of sensors and signals
The input factors are read in via the following connections:
- Direct line
- Interior CAN (CAN B)
Direct line
The signals from the following components are read via direct lines:
- Trunk lid/liftgate lock main lock switch (A85/5s1)
- Trunk lid/liftgate lock safety catch switch (A85/5s2) (model 205.2, 253)
- Reverse switch for liftgate lock element (M14/4) (model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Rear window roller sun blind motor (M24) (model 205.0/1 with CODE 540 (Electric roller sun blind for rear window))
- Left load compartment cover Hall sensor (M50/1b1) (model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Right load compartment cover Hall sensor (M50/2b1) (model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Electronic Stability Program control unit (N30/4) (circuit 54)
- Right rear brake wear sensor (S10/4)
- Left rear backrest inclination switch (S54/5) (model 205.0/1 with CODE 287 (Folding rear seat backrests), model 205.2, 253)
- Right rear backrest inclination switch (S54/6) (model 205.0/1 with CODE 287 (Folding rear seat backrests), model 205.2, 253)
- Left rear backrest lock switch (S54/7) (model 205.0/1 with CODE 287 (Folding rear seat backrests), model 205.2, 253)
- Right rear backrest lock switch (S54/8) (model 205.0/1 with CODE 287 (Folding rear seat backrests), model 205.2, 253)
- Left trunk rear backrest release button (S54/9) (model 205.2, 253)
- Right trunk rear backrest release button (S54/10) (model 205.2, 253)
- Left rear backrest release button (S54/11) (model 205.2, 253)
- Right rear backrest release button (S54/12) (model 205.2, 253)
- Trunk lid/liftgate control button (S62/26) (model 205.0/1 with CODE 881 (Remote trunk closing), model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Left rear seat belt buckle switch (S68/11)
- Right rear seat belt buckle switch (S68/12)
- Center rear seat belt buckle switch (S68/14) (model 205.0/1/2, 253)
- Trunk lid/liftgate external operation switch (S88/8)
- Trunk lid emergency opening switch (S88/10) (model 205.0/1 with CODE 494 (USA version))
Interior CAN
The signals are read in by the rear SAM control unit via 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.
Controlling functions
The rear SAM control unit controls the following functions:
- Ambiance illumination in rear (with CODE 876 (Interior lights package))
- Central locking
- Trunk lid/liftgate power closing (model 205.0/1 with CODE 881 (Remote trunk closing), model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
Actuation of components
The actuation of the components takes place via the following connections:
- Direct line
- Interior CAN
Direct line
The following components are actuated via direct lines:
- Trunk lid/liftgate lock motor (A85/5m1)
- Left rear lamp unit (E3):
- Left rear turn signal lights (E3e1)
- Left backup lamp (E3e3) (model 205.0/1)
- Left backup lamp (E3/1e3) (model 205.2)
- Left brake light (E3e4)
- Left rear fog light (E3e5) (model 205.0/1)
- Left rear fog light (E3/1e5) (model 205.2, 253)
- Left side marker light (E3e6) (with CODE 460 (Canada version) or CODE 494 (USA version))
- Left taillight (E3e18)
- Right rear lamp unit (E4):
- Right rear turn signal lights (E4e1)
- Right backup lamp (E4e3) (model 205.0/1)
- Right backup lamp (E4/1e3) (model 205.2, 253)
- Right brake light (E4e4)
- Right side marker light (E4e6) (with CODE 460 (Canada version) or CODE 494 (USA version))
- Right taillight (E4e18)
- Left rear footwell lamp (E17/17) (with CODE 876 (Interior lights package))
- Right rear footwell lamp (E17/18) (with CODE 876 (Interior lights package))
- Right trunk lamp (E18/4)
- Left trunk lamp (E185)
- Left license plate lamp (E19/1)
- Right license plate lamp (E19/2)
- Center brake lamp (E21)
- Left trunk lid/liftgate ambient lamp and warning lamp (E40/2)
- Right trunk lid/liftgate ambient lamp and warning lamp (E40/3) (model 205.2, 253)
- Liftgate wiper motor (M6/4) (model 205.2, 253)
- Liftgate lock element (model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Tank cap central locking actuator (M14/10)
- Trunk lid lock element (M14/31) (model 205.0/1 with CODE 881 (Remote trunk closing))
- Rear window roller sun blind motor (model 205.0/1 with CODE 540 (Electric roller sun blind for rear window))
- Left load compartment cover actuator motor (M50/1) (model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Right load compartment cover actuator motor (M50/2) (model 205.2, 253 with CODE 890 (EASY-PACK liftgate))
- Left rear backrest release actuator (M53/15) (model 205.2, 253)
- Right rear backrest release actuator (M53/16) (model 205.2, 253)
- Ambiance illumination power supply (with CODE 877 (Ambiance illumination))
Interior CAN
The signals are sent 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).
Switching of relays
The following relays are switched by the rear SAM control unit:
- Vehicle interior circuit 15 relay (K40/5kS)
- Rear window heater relay (K40/5kT)
- 2nd seat row cupholder and sockets relay (K40/5kU)
- Circuit 15R relay (K40/5kW)
- 1st seat row/trunk refrigerator box and sockets relay (K40/5kX)
| Wiring diagram for rear signal acquisition and actuation module (SAM) control unit | PE54.21-P-2103-97FBA |