Component Description For Front SAM Control Unit With Fuse And Relay Module - GF54.21-P-6070LE
MODEL 216.3, 221.0/1 as of model year 2009/YoM 08
Illustrated on model 221.0
Location
The front SAM control unit is in the control unit box on the left inside the engine compartment.
Task
The front SAM control unit has the following tasks:
- Reading in of sensors, pickups and signals
- Evaluation of input factors
- Control of systems
- Actuating components
- Voltage supply to components
- Switching consumers using relays
Reading in of sensors, pickups and signals
The input factors are read in via the following connections:
- Direct line
- Climate control LIN (LIN B8)
- On-board electrical system LIN (LIN B7)
- Interior CAN (CAN B)
Direct line
The signals from the following components are read via a direct line:
- Circuit 30 (no-load current switch) (up to 31.8.10)
- Circuit 30g (no-load current switch) (up to 31.8.10)
- Refrigerant pressure sensor (B12)
- Outside temperature indicator temperature sensor (B14)
- ECO start/stop function additional battery (G1/13)
(with code (B03) ECO start/stop function)
- Hall sensor of steering column in/out motor (M20/1)
- Hall sensor of steering column up/down motor (M20/2)
- Left rear center air outlet potentiometer (R41/4r1)
- Right rear center air outlet potentiometer (R41/4r2)
- Right front brake pad contact sensor (S10/2)
- Brake fluid indicator switch (S11)
- Coolant level indicator switch (S41)
- Windshield washer system fluid level indicator switch (S42)
Climate control LIN
The signals from the following components are read in via the climate control LIN:
- AAC multifunction sensor (B31/1)
- AAC [KLA] 4-way sun sensor (B32/2)
The signals from the refrigerant pressure sensor, the AAC multifunction sensor and the AAC [KLA] sun sensor (4 in total) are forwarded to the AAC control unit (N22/1) via the climate control LIN.
On-board electrical system LIN
The signals from the following component are read in via the on-board electrical system LIN:
- Battery sensor (B95)
Interior CAN
The signals are read in by the front SAM control unit via 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 microprocessor and the corresponding components are actuated.
Control of systems
The front SAM control unit controls the following systems:
- Exterior lights (ABL)
- Wiper system (WSA)
- Electrically adjustable steering column (ESC [EVL])
- Fanfare horns
- Wiper rest heater
Actuation of components
The components are actuated via direct lines.
The following components are actuated with a direct line:
- Left front lamp unit (E1)
- Right front lamp unit (E2)
- Model 221 as of 1.6.09 without code (498) Japan version:
- Left daytime running lights headlamp (E1/3)
- Right daytime running lights headlamp (E2/3)
- Model 216, model 221 up to 31.5.09, model 221 as of 1.6.09 without code (236) LED daytime running lights:
- Left front fog lamp (E5/1)
- Right front fog lamp (E5/2)
- For code (494) USA version:
- Left front side-marker lamp (
E6/1)
- Right front side-marker lamp (
- Left front side-marker lamp (
- Stowage compartment lighting (E13/3)
- Quiescent current cutout relay (F32/4k2)
- Control unit box fan motor (M4/8) (with engine 275.9)
- Windshield washer fluid pump (M5/1)
- HCS [SRA] pump (M5/2)
(with code (600) Headlamp cleaning system)
- Master wiper motor (M6/6)
- Slave wiper motor (M6/7)
- Coolant circulation pump (M13)
- Steering column in/out motor
- Steering column up/down motor
- Electric air pump (M33) (with engine 156, 272, 273, 275)
- Washer nozzle heating (R2/1)
- Wiper park position heater (R2/10)
- Washer nozzle hose heater (R2/11)
(with code (875) heated windshield washer system)
- Front cigar lighter with ashtray illumination (R3)
- Electric parking brake switch (S76/15)
- AC water valve (Y19/2)
Voltage supply to components
Limit switches supply various components and control units with voltage according to the function sequence.
The requests are forwarded to the front SAM control unit either via the interior CAN or via directly read-in switches and sensors. The components and control units supplied with voltage are protected against overload by means of fuses.
Detailed information can be found in the description "Fuse and relay box, as-built configuration".
Switching consumers using relays
The front SAM control unit serves as a mount for the following relays which actuate various consumers:
- Air pump relay (N10/1kA)
- Air suspension compressor relay (N10/1kB)
- Terminal 87 relay, engine (N10/1kC)
- Terminal 15 relay (N10/1kD)
- Terminal 87 relay, chassis (N10/1kE)
- Fanfare horn relay (N10/1kF)
- Terminal 15R relay (N10/1kG)
- Circuit 50 relay, starter (N10/1kH)
- Circuit 15 relay, starter (N10/1kJ)
- Wiper park heater relay (N10/1kK)
| Wiring diagram of front SAM control unit with fuse and relay module (N10/1) | Model 216 | PE54.21-P-2106-97CAA | |
| sheet 1 | |||
| Sheet 2 | PE54.21-P-2106-97CAB | ||
| Sheet 3 | PE54.21-P-2106-97CAC | ||
| Sheet 4 | PE54.21-P-2106-97CAD | ||
| Sheet 5 | PE54.21-P-2106-97CAE | ||
| Model 221 | PE54.21-P-2106-97SAA | ||
| Sheet 1 | |||
| Sheet 2 | PE54.21-P-2106-97SAB | ||
| Sheet 3 | PE54.21-P-2106-97SAC | ||
| Sheet 4 | PE54.21-P-2106-97SAD | ||
| Sheet 5 | PE54.21-P-2106-97SAE |