Component description for front SAM control unit - GF54.21-P-7010GM
MODEL 164.1/8, 251.0/1 as of model year 2009
Model 164, shown on model 164.1
Location
The front SAM control unit is located under the front passenger seat on the right next to the battery.
Model 251, shown on model 251.1
Location
The front SAM control unit is located in the front passenger footwell in front of the battery.
Task
The front SAM control unit has the following tasks:
- Reading in of sensors, pickups and signals
- Evaluation of input factors
- Controlling functions
- Actuation of components
- Switching of relays
Reading in of sensors, pickups 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:
- Hall sensor of left rear power window motor (M10/5)
- Hall sensor of right rear power window motor (M10/6)
- Right front brake pad contact sensor (S10/2)
- Right rear brake pad contact sensor (S10/4)
- Brake fluid indicator switch (S11)
- Parking brake switch (S12)
- Left rear power window switch (S21/3)
- Right rear power window switch (S21/4)
- Coolant level indicator switch (S41)
- Windshield washer system fluid level indicator switch (S42)
Interior CAN
The signals are read in by the front 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 that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.
Controlling functions
The front SAM control unit controls the following functions:
- Wiper system
- Exterior lights
- Headlamp cleaning system (with code (600) Headlamp cleaning system)
- Footwell lighting
- Washer nozzle heater
- Seat heater (with code (873) Seat heater, left and right front seat)
- Power windows in the rear
- Left rear door lock
Actuation of components
Components are actuated with the following connection:
- Direct line
Direct line
The following components are actuated via direct lines:
- Left front lamp unit (E1)
- Right front lamp unit (E2)
- On model 164.1 as of 1.8.10 with code (236) LED daytime running lights, model 164.8 as of 1.7.09, model 251.0/1 as of 1.8.10:
- Left daytime running lights headlamp (E1/3)
- Right daytime running lights headlamp (E2/3)
- On model 164.1 up to 31.7.10 and as of 1.8.10 without code (236) LED daytime running lights, model 164.8 up to 30.6.09 and as of 1.7.09 without code (236) LED daytime running lights, model 251.0/1 up to 31.7.10 and as of 1.8.10 without code (614) Bi-xenon headlamp unit and without code (618) Bi-xenon headlamp:
- Left fog lamp (E5/1)
- Right fog lamp (E5/2)
- Left standing light and parking light (E6/13) (model 251 up to 31.7.10)
- Right standing light and parking light (E6/14) (model 251 up to 31.7.10)
- Right front footwell lamp (E17/15)
- Left front footwell lamp (E17/16)
- Right rear footwell lamp (E17/17)
- Left rear footwell lamp (E17/18)
- Additional battery (G1/7)
- Windshield washer fluid pump (M5/1)
- HCS pump (M5/2) (with code (600) Headlamp cleaning system)
- Left rear power window motor
- Right rear power window motor
- Left rear door CL [ZV] motor (M14/8)
- Center washer nozzle heater (R2/1)
- Left washer nozzle heater (R2/2)
- Right washer nozzle heater (R2/3)
- Washer nozzle hose heater (R2/11) (on model 251 as of 1.8.10 with code (875) Heated windshield washer system)
- With code (873) Heated seats, left and right front seat:
- Left front seat heater pad (R13/1)
- Left front backrest heater pad (R13/2)
- Right front seat heater pad (R13/3)
- Right front backrest heater pad (R13/4)
Switching of relays
The following relays are switched by the front SAM control unit:
- Wiper speed 1/2 relay (F58kA)
- Wiper ON/OFF relay (F58kB)
- Fanfare horn relay (F58kF)
- Circuit 15 relay (F58kH)
- Relay for seat heater (internal) (emergency shutoff)
| Wiring diagram for front signal acquisition and actuation module (SAM) control unit | MODEL 164.1/8 as of model year 2009 Specification 1 | PE54.21-P-2114-97MAA | |
| MODEL 164.1/8 as of model year 2009 Specification 2 | PE54.21-P-2114-97MAB | ||
| MODEL 164.1/8 as of model year 2009 Specification 3 | PE54.21-P-2114-97MAC | ||
| MODEL 164.1/8 as of model year 2009 Specification 4 | PE54.21-P-2114-97MAD | ||
| MODEL 251.0/1 as of model year 2009 Specification 1 | PE54.21-P-2114-97RAA | ||
| MODEL 251.0/1 as of model year 2009 Specification 2 | PE54.21-P-2114-97RAB | ||
| MODEL 251.0/1 as of model year 2009 Specification 3 | PE54.21-P-2114-97RAC | ||
| MODEL 251.0/1 as of model year 2009 Specification 4 | PE54.21-P-2114-97RAD |