Component description for rear SAM control unit with fuse and relay module - GF54.21-P-6030CE

MODEL 204.0/2 as of model year 2009 

/YoM 08 

MODEL 204.3 

MODEL 204.9 

Model 204.0/2/3, shown on model 204.0 

Location 

The rear SAM control unit is located in the rear right of the luggage compartment.

Model 204.9 

Location 

The rear SAM control unit is located on the front crossmember in the trunk.

Task 

The rear SAM control unit has the following tasks:

• Reading in of sensors, pickups and signals 
• Evaluation of input factors 
• Controlling functions 
• Actuating 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:

• FM, AM and CL antenna amplifier (A2/18) (model 204.0/3)
• Rear window antenna amplifier 1 (A2/71) (model 204.2/9)
• Left rear door rotary tumbler switch (A85/3s1) (with model 204.0/2/9)
• Right rear door rotary tumbler switch (A85/4s1) (with model 204.0/2/9)
• Left fuel level indicator sensor (B4/1)
• Right fuel level indicator sensor (B4/2)
• Trunk lid rotary tumbler switch (M14/7s1) (model 204.0/3)
• Liftgate rotary tumbler switch (M14/7s1) (model 204.2/9)
• Tank cap central locking motor (M14/10)
• With model 204.0/3 with code (287) Through-loading feature, model 204.2/9:
  • 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)
• For code (551) Antitheft alarm system (ATA [EDW]):
  • Pedestrian protection Hall sensor + engine hood ATA switch (A38/1) (on model 204.3 with code (U60) Pedestrian protection)
  • Left engine hood contact switch (S62/43) (without code (U60) Pedestrian protection)
• with code (889) Keyless-Go:
  • KEYLESS-GO trunk lid button (S62/21) (model 204.0/3)
  • Liftgate KEYLESS-GO button (S62/21) (model 204.2/9) With model 204.2/9 with code (890) EASY-PACK liftgate
  • Liftgate control button (S62/36)
  • Left rear seat belt buckle switch (S68/5)
  • Right rear seat belt buckle switch (S68/6)
  • Center rear seat belt buckle switch (S68/14)
  • With model 204.0/3 with code (887) Valet Parking:
    • Trunk lid contact switch (S88/6)
  • With model 204.0/3 with code (494) USA version
    • Trunk lid emergency opening switch (S88/10)
  • Trunk lid external operation switch (S88/8) (model 204.0/3)
  • Liftgate external operation switch (S88/8) (model 204.2/9)

LIN 

The signals from the following components are read in via LIN:

• On-board electrical system LIN (LIN B7):
  • Battery sensor (B95)
• Rear SAM LIN (LIN B4):
  • Alarm siren (H3/1)

    (up to 31.5.10 with code (551) Antitheft alarm system (ATA [EDW]), as of 1.6.10 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 resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

  Evaluation of input factors 

  The input factors are evaluated by the integrated microprocessor and the relevant systems or components are then actuated.

  Controlling functions 

  The rear SAM control unit controls the following functions:

  • Battery state recognition
  • Exterior lights (ABL) for vehicle rear
  • Rear window defroster
  • Trunk lid lock (model 204.0/3), Liftgate (model 204.2/9) and fuel filler door
  • Heated seats (HS)

    (with code (873) front left and right heated seats)

  • Electric rear window roller blind

    (with model 204.0 with code (540) Roller sun blind)

  • Antitheft alarm system (ATA [EDW])

  (with code (551) Antitheft alarm system (ATA [EDW]))

  Component actuation 

  The actuation of the components takes place via the following connections:

  • Direct line 
  • LIN 
  • Interior CAN 

  Direct line 

  The following components are actuated via a direct line:

  • Left rear lamp unit (E3)
  • Right rear lamp unit (E4)
  • Model 204.0/2, model 204.9 with code (460) Canada version or code (494) USA version:
    • Left rear side marker lamp (E6/3)
    • Right rear side marker lamp (E6/4)
  • Right luggage compartment lamp (E18/4)
  • Left trunk lamp (E18/5) (model 204.2)
  • Left license plate lamp (E19/1)
• Right license plate lamp (E19/2)
• Center brake lamp (E21)
• Ambient lamp and left trunk lid warning lamp (E40/2) (model 204.0/3)
• Ambient lamp and left liftgate warning lamp (E40/2) (model 204.2/9)
• Ambient lamp and right liftgate warning lamp (E40/3) (model 204.2)
• Liftgate wiper motor (M6/4) (for model 204.2/9)
• Trunk lid central locking motor (M14/7) (model 204.0/3)
• Liftgate central locking motor (M14/7) (model 204.2/9)
• Tank cap central locking motor (M14/10)
• On model 204.0 with code (540) Roller sun blind:
  • Roller sun blind motor for rear window (M24)
• With code (409) Left/right front multicontour seats
  • Pneumatic pump for MKS (M40)
• For code (494) USA version:
  • Trunk lid emergency opening switch
• Rear window heater (R1)
• 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 (up to 31.5.10 and as of 1.6.10 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 resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

	Wiring diagram of rear SAM control unit with fuse and relay module (N10/2)	Sheet 1	PE54.21-P-2108-97FAA
		Sheet 2	PE54.21-P-2108-97FAB
		Sheet 3	PE54.21-P-2108-97FAC
		Sheet 4	PE54.21-P-2108-97FAD
		Sheet 5	PE54.21-P-2108-97FAE
		Sheet 6	PE54.21-P-2108-97FAF
		Sheet 7	PE54.21-P-2108-97FAG
		Sheet 8	PE54.21-P-2108-97FAH