GF54.21-P-7030GM Component Description For Rear SAM Control Unit

GF54.21-P-7030GM Component Description For Rear SAM Control Unit

Component Identification:

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

Component Identification:

Location
The rear SAM control unit is located on the right under the rear bench seat.

Task
Depending on the function sequence the rear SAM control unit supplies various systems and control units with voltage via limit switches. In addition the rear SAM control unit has the following tasks:
^ Reading in of sensors, pickups and signals
^ Evaluation of input factors
^ Control of systems
^ Actuation of components
^ Switching of relays

Reading in of sensors, pickups and signals
The input factors are read in with the following connections:
^ Direct line
^ Interior CAN (CAN B)

Direct line
The signals from the following components are read via a direct line:
- Interference suppression filter for radio antenna (A49/6)
- Rear door locking unit (A72)
- Fuel pump with fuel gauge sensor (M3/3)
- Right front door rotary tumbler microswitch (M14/5s1)
- Left front door rotary tumbler microswitch (M14/6s1)
- Left rear door rotary tumbler microswitch (M14/8s1)
- Right rear door rotary tumbler microswitch (M14/9s1)
- Rear-end door handle switch (S88/9)
- Access aid microswitch for 2nd seat row, right (S159/1) (with model 164.8 with code (845) Electric folding 3rd seat row)
- Redundant crash signal from restraint systems control unit (N2/7)
- For code (551) Antitheft alarm system (ATA [EDW]):
- Alarm horn (H3) (with code (460) Canada version or code (494) USA version )
- Alarm siren (H3/1) (without code (460) Canada version or without code (494) USA version)
- ATA [EDW] hood switch (S62)

- With code (414) Power glass tilting/sliding roof or code (848) Electrically operated side window:
- Left vent window obstruction sensor strip (B51/5)
- Right vent window obstruction sensor strip (B51/6)

- Model 164 with code (849) Spare tire holder/spare tire:
- Spare tire carrier "locked" switch (S151/1)
- Spare tire carrier "open" switch (S151/2)
- Spare tire carrier control button (S151/3)

Interior CAN
The signals are read in by the rear 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
- Rear window defroster
- Rear window wiper system
- Antitheft alarm system (with code (551) Antitheft alarm system (ATA [EDW]))
- Turn signal indicator function (as master)
- Central locking
- Liftgate power closing (with code (890) EASY-PACK liftgate)
- Trailer recognition (with code (550) Trailer hitch)
- Left and right rear vent window (with code (414) Glass electric tilting/sliding roof or code (848) Electrically operated side window)
- Rear door illumination
- Lighting system for rear-end door and luggage compartment

Actuation of components
The actuation of the components takes place via the following connections:
^ Direct line
^ Interior CAN

Direct line
The following components are actuated via a direct line:
- Rear door locking unit
- Left taillights (E3)
- Right taillights (E4)
- Left rear door entrance and exit lamp (E17/5)
- Right rear door entrance and exit lamp (E17/6)
- Left rear door inside handle illumination (E17/13) (with code (876) Interior lights package)
- Right rear door inside handle illumination (E17/14) (with code (876) Interior lights package)
- Rear-end door warning lamp (E17/27) (without code (890) EASY-PACK liftgate)
- Right trunk lamp (E18/4) (with model 251.0/1)
- Left trunk lamp (E18/5) (with model 164.8)
- Left liftgate license plate lamp (E19/3)
- Right liftgate license plate lamp (E19/4)
- Center high-mounted stop lamp (E21)
- Rear-end door ambient lamp (E40/1) (with code (876) Interior lights package or without code (890) EASY-PACK liftgate)
- Left rear door CL [ZV] motor (M14/8)
- Right rear door CL [ZV] motor (M14/9)
- Fuel filler flap CL [ZV] motor (M14/10)
- Lumbar pump (M25/1)

- Model 164.8 as of 1.7.09 with code (877) Ambiance illumination
- Left front door ambiance illumination (E17/43)
- Right front door ambiance illumination (E17/44)
- Left rear door ambiance illumination (E17/45)
- Right rear door ambiance illumination (E17/46)
- Driver instrument panel ambiance illumination (E43/7)
- Front passenger instrument panel ambiance illumination (E43/8)

- Model 164 with code (849) Spare tire holder/spare tire:
- Left additional taillamp (E3/5)
- Right additional taillamp (E4/5)
- License plate lamp, left spare tire carrier (E19/5)
- License plate lamp, right spare tire carrier (E19/6)
- Central locking motor, spare tire carrier (M14/13)

- For code (551) Antitheft alarm system (ATA [EDW]):
- Alarm horn (with code (460) Canada version or code (494) USA version )
- Alarm siren (without code (460) Canada version or without code (494) USA version )

- With code (414) Power glass tilting/sliding roof or code (848) Electrically operated side window:
- Left vent window motor (M21/8)
- Right vent window motor (M21/9)

- With code (550) Trailer hitch:
- Trailer hitch socket, 13-pin (X58) (without code (460) Canada version or without code (494) USA version )
- Trailer hitch socket, 7-pin (X58/11) (with code (460) Canada version or with code (494) USA version)

Interior CAN
The signals are sent 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).

Switching of relays
The following relays are switched by the rear SAM control unit:
- Socket circuit 15R relay (with run-on) (F4kK)
- Trailer circuit 30X relay (F4kL)
- Heated rear window relay (F4kM)
- Rear wiper relay (F4kP)
- Reserve 2 (normally open contact) (F4kT)
- Trailer relay terminal 30 (F4kU)