Front SAM control unit with fuse and relay module, component description - GF54.21-P-6070CW

MODEL 204.0/2 up to Model Year 8 

Illustrated on model 204.0 

Location 

The front SAM control unit is located in the left of the engine compartment.

Task 

The front SAM control unit is connected to the interior CAN, chassis CAN, the front end CAN and the diagnostic CAN for the exchange of data.

Limit switches supply systems and control units with voltage to match the function sequence. Requests are conveyed to the front SAM control unit via the CAN, instrument panel LIN, the wiper/inside rearview mirror LIN or via read-in switches and sensors.

The individual components are protected via fuses contained in the fuse and relay block.

Control of the following systems 

• Wiper system
• Exterior lights (master)
• Interior illumination (master)
• Turn signal lamps (master)
• Fanfare horns
• Locking of rear doors (not on vehicles)
• Heating the windshield washer system

  (with code (875) heated windshield washer system)

• Headlamp cleaning system

  (with code (600) Headlamp cleaning system)

• Rain closing of tilting/sliding roof

(with code (414) Power glass tilting/sliding sunroof and code (345) rain sensor)

Gateway between the following LINs 

• Instrument panel LIN
• Wiper/inside rearview mirror LIN

Central gateway between the following CANs 

• Interior CAN
• Chassis CAN
• Diagnostic CAN
• Front end CAN

Discrete inputs 

• Refrigerant pressure sensor (B12)
• Outside temperature sensor (B14)
• Right front brake wear sensor (S10/2)
• Right rear brake wear sensor (S10/4)
• Brake fluid level switch (S11)
• Parking brake indicator switch (S12)
• Backup lamp switch (S16/2) (on transmission 711 and 716)
• Coolant level switch (S41)
• Windshield washer system fluid level switch (S42)

Discrete outputs 

• Circuit 30, circuit 30g
• Circuit 31
• Refrigerant compressor (A9)
• Left rear door lock (A85/3)
• Right rear door lock (A85/4)
• Left front lamp unit (E1)
• Right front lamp unit (E2)
• Left front fog lamp (E5/1)
• Right front fog lamp (E5/2)
• Left front side-marker lamp (E6/1) (only and )
• Right front side-marker lamp (E6/2) (only) and )
• Left center vent symbol illumination (E10/1)

  (with code (954) Avantgarde or with code (955) Elegance)

• Left front side vent symbol illumination (E10/2)

  (with code (954) Avantgarde or with code (955) Elegance)

• Right front side vent symbol illumination (E10/3)

  (with code (954) Avantgarde or with code (955) Elegance)

• Rear vent symbol illumination (E10/5)

(with code (581) Comfort automatic air conditioning and with code (954) Avantgarde or with code (955) Elegance)

• Right front footwell lamp (E17/15)

  (with code (954) Avantgarde or with code (955) Elegance)

• Left front footwell lamp (E17/16)

  (with code (954) Avantgarde or with code (955) Elegance)

• Left fanfare horn (H2)
• Right fanfare horn (H2/1)
• Windshield washer system pump (M5/1)
• Headlamp cleaning system pump (M5/2)

  (with code (600) Headlamp cleaning system)

• Wiper motor (M6/1)
• Coolant circulation pump (M13/5)
• Spray nozzle heater (R2/1)
• Spray nozzle hose heater (R2/11)

  (with code (875) Heated windshield washer system)

• Ashtray illumination (R3e1)
• Purge control valve (Y58/1)

  (on engine 272 not )

• Activated charcoal filter shutoff valve (Y58/4) (on with engine 272)

  Power supply of 

  • Instrument cluster (A1)
  • Audio components
  • Panoramic sliding roof control module (A98)

    (with code (413) Panoramic glass sunroof with top sliding sunroof)

  • Front passenger seat occupied recognition (B41/1)

    (without code (U18) automatic child seat recognition (ACSR))

  • Front passenger seat occupied recognition and ACSR (B48)

    (with code (U18) automatic child seat recognition (ACSR))

  • Glove compartment lamp (E13/1) (switched via the glove compartment lamp switch (S17/9))
  • CDI control unit (N3/9) (on diesel engine)

    ME-SFI [ME] control unit (N3/10) (on gasoline engine)

  • Rear SAM control unit with fuse and relay module (N10/2/)
  • Oxygen sensor upstream of catalytic converter (G3/2) (on diesel engine)
  • Supplemental restraint system control unit (N2/10/)
  • Electronic transmission control control unit (N15/3) (on transmission 722.6)
  • Electronic selector lever module control unit (N15/5)

    (with transmission 722)

  • Rear automatic air conditioning operating unit (N22/4)

    (with code (581) Comfort automatic air conditioning)

  • Automatic air conditioning control and operating unit (N22/7)
  • Electric steering lock control unit (N26/5)
  • Electronic Stability Program control unit (N30/4)
  • Left front door control unit (N69/1/)
  • Right front door control unit (N69/2/)
  • Fan motor control unit (N65/2)
  • Overhead control panel control unit (N70)

    (with code (414) Power glass tilting/sliding sunroof)

  • Overhead control panel electronics (N70/3)

    (without code (414) Power glass tilting/sliding sunroof or with code (413) Panoramic glass sunroof with top sliding sunroof)

  • Upper control panel control unit (N72/1/)
  • Electronic ignition lock control unit (N73)
  • Steering column module control unit (N80)
  • Fuel pump control unit (N118) (on gasoline engine)
  • Stop lamp switch (S9/1)
  • Fully integrated transmission control controller unit (Y3/8) (on transmission 722.9)

  Looping through of signals 

  • Signals from the supplemental restraint system control unit to the CDI control unit or ME-SFI [ME] control unit
  • Signal from the engine hood anti-theft alarm system switch (S62) (with code (551) Anti-theft alarm system (ATA [EDW])) to the rear SAM control unit
  • Signals from the left rear level sensor (B22/7) (with code (614) Bi-xenon headlamp unit or with code (622) Intelligent Light System (right-hand traffic)) to left front lamp unit
  • Signals from pollutant sensor (B31)

    (with code (581) Comfort automatic air conditioning) to automatic air conditioning control and operating unit

  • Requests from ME-SFI [ME] control unit to fuel pump control unit
• Signals from interior temperature sensor (N70/3b1) (without code (414) Power glass tilting/sliding sunroof to automatic air conditioning control and operating unit)

There is a connection to the following components via the local interconnect network (LIN): 

• Via instrument panel LIN:
  • Exterior lights switch (S1)
  • Instrument panel switch group (S6/1)
• Wiper/inside rearview mirror LIN:

• Wiper motor
• Overhead control panel control unit or overhead control panel electronics

Switching the following relays 

• Terminal 15 relay (N10/1kJ)
• Terminal 15R relay (N10/1kK)
• Fanfare horn relay (N10/1kO)
• Backup relay (N10/1kL)
• Backup relay (N10/1kQ)

Carrier for the following relays 

• Engine circuit 87 relay (N10/1kN)
• Chassis circuit 87 relay (N10/1kR)
• Secondary air injection relay (N10/1kP)
• Circuit 50 starter relay (N10/1kM)

Switching consumers using relays 

• Fuel pump (M3) (with diesel engine) via the fuel pump relay (N10/2kD) in the rear SAM control unit
• Electric air pump (M33) (on engine 272) via the secondary air injection relay