Component description for the SAM control unit - GF54.21-P-4157MCU

MODEL 451.3/4 

Location 

The SAM control unit is located in the footwell on the passenger side.

Task 

The SAM control unit supplies control units and electrical components with voltage via limit switches. The individual control units and electrical components are fused via the fuse and relay blocks contained in the SAM control unit.

The SAM control unit controls the following functions:

• Drive authorization
• Central locking
• Exterior lighting
• Interior lighting
• Wiper system
• Rear window defroster
• Heated outside mirror (with code (V21) Electrically adjustable and heated outside mirror (FFO))
• Anti-theft alarm system (with code (V01) Anti-theft alarm system (FFO))
• Soft top (with model 451.4)

Requests are conveyed to the SAM control unit via data bus systems or via read-in switches and sensors.

The SAM control unit is a subscriber on the Controller Area Network (data bus/CAN bus) (CAN).

The following components are read in to control the functions:

Via local interconnect network interior 1 (LIN B):

• Rain sensor / light sensor (B38) (with code (V54) Rain/light sensor)
• Tachometer (A15p4) (with code (V31) Cockpit clock and tachometer package)

Via local interconnect network interior 2 (LIN C):

• Alarm siren with inclination sensor (H3/2) (with code (V01) Vehicle theft alarm (FFO))
• Microwave sensor (B32) (with code (V01) Vehicle theft alarm (FFO))

Components read in directly:

• Transmitter key
• Transponder coil (L11)
• Wiper motor (M6/1)
• Rear-end door wiper motor (M6/4) (on model 451.3)
• Heated rear window switch (N23s1)
• Ignition/starter switch (S2/1)
• Combination switch (S4)
• Fanfare horns switch (S4/2) (except code (I75) Leather sport steering wheel incl. steering wheel rocker switch system)
• Right wiper switch (S4/4)
• Hazard flasher switch (S6/1s1)
• Front fog lamp switch (S6/1s8) (with code (V07) Front fog lamp (FFO))
• (S6/1s9TPM [RDK] switch)
• Tow-away protection /Interior protection switch (S6/1s10) (with code (V01) Vehicle theft alarm (FFO))
• Inside unlock CL (ZV) switch (S6/1s11)
• Inside lock CL (ZV) switch (S6/1s12)
• Stop light switch (S9/1)
• Remote trunk opening switch (S15) (on model 451.3)
• Trunk lid rotary tumbler microswitch (S17/8) (on model 451.4)
• Soft top operation (S84) (on model 451.4)
• Soft top microswitch (S84/37) (on model 451.4)
• Left roof cassette microswitch (S84/38) (on model 451.4)
• Right roof cassette microswitch (S84/40) (on model 451.4)
• Right door rotary tumbler microswitch (S87/6)
• Left door rotary tumbler microswitch (S87/7)
• Right rear soft top microswitch (S84/39) (on model 451.4)
• Left rear soft top microswitch (S84/41) (on model 451.4)
• Tailgate handle switch (S88/9)

The following components are actuated directly to carry out the functions:

• Refrigerant compressor (A9) (with code (I01) Air conditioning Plus)
• Left front lamp unit (E1)
  • Left high beam (E1e1)
  • Left low beam (E1e2)
  • Left turn signal lights (E1e5)
  • Left standing lights (E6/13)
• Right front lamp unit (E2)
  • Right high beam (E2e1)
  • Right low beam (E2e2)
  • Right turn signal lights (E2e5)
  • Right standing lights (E6/14)
• Left taillamp (E3)
  • Left turn signal lights (E3e11)
  • Left taillight (E3e2) - Left brake light
• Right taillamp (E4)
  • Right brake light/turn signal lights (E4e11)
  • Right taillight (E4e2)
• Left front fog lamp (E5/1) (with code (V07) front fog lamp (FFO))
• Right front fog lamp (E5/2) (with code (V07) Front fog lamp (FFO))
• Front interior lamp (E15/4)
• Left license plate lamp (E19/1)
• Right license plate lamp (E19/2)
• Center high-mounted stop lamp (E21)
• Left auxiliary turn signal lamp (E22/1)
• Right auxiliary turn signal lamp (E22/2)
• Horn (H2)
• Open soft top relay (K66/1) (model 451.4)
• Close soft top relay (K66/2) (model 451.4)
• Left turn signal lamps/brake light relay (K52/11)
• Right turn signal lamps/brake light relay (K52/12)
• Blower motor (M2)
• Fuel pump with fuel gauge sensor (M3/3)
• Wiper motor (M6/1)
• Rear-end door wiper motor (M6/4) (model 451.3)
• Electrical soft top motor (M12/6) (model 451.4)
• Left soft top drive (M12/7) (model 451.4)
• Right soft top drive (M12/8) (model 451.4)
• Right door CL motor (M14/5)
• Left front door central locking motor (M14/6)
• Rear-end door CL [ZV] motor (M14/7)
• Fuel filler flap CL [ZV] motor (M14/10)
• Mirror heater (M21/1r1) (with code (V21) Electrically adjustable and heated outside mirror (FFO))
• Mirror heater (M21/2r1) (with code (V21) Electrically adjustable and heated outside mirror (FFO))
• Heated rear window (R1)