Model 171
Rear SAM control unit
P54.21-2604-00
Rear SAM control unit with fuse and relay module (N10/2) shown on model 171
Location
Removal/installation
The rear SAM control unit with fuse and relay module
(N10/2) is located on the control unit plate in the
trunk.
The work instructions are documented in WIS:
f54.21-P-1258V Model 171.4
Tasks
Control
Exterior lights function, master control unit for the
turn signal functions Model 171.4
Workshop Information System
(WIS)
n82.10-P-0999SK
without code (614) Bi-xenon headlamp unit
n82.10-P-09999SKX
with code (614) Bi-xenon headlamp unit
24
Central locking (CL [ZV]) Model 171.4
n80.20-P-0996SK
Anti-theft alarm system (ATA [EDW]) Model 171.4
n80.50-P-0999SK
with code (551) Anti-theft alarm system
(ATA [EDW])
Heated rear window (HHS) Model 171.4
n67.29-P-0998SK
b Overview of SAM Control Units/Current Passenger Car Model Series 2005
– This printout will not be recorded by the update service. Status: 08 / 2005 –
Switching of consumers
Scanning of switches, pickups and sensors
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Left taillamp (complete)
Right taillamp (complete)
License plate illumination
Center high-mounted stop lamp
Trunk illumination
Trunk lid emergency release switch
Trunk lid lock 90° switch
Trunk lid CL [ZV] motor
KIT switch function illumination I
Alarm signal horn with additional battery
(with code 551 via interface)
Switching the following relays
• Tank cap pole reverser relays 1 and 2
• Circuit 15R relays 1 and 2
• Heated rear window relay
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•
•
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•
Fuel level sensor
Left door contact switch
Right door contact switch
Trunk lid external operation switch
ATA [EDW] center console compartment switch
(with code 551)
Rear wall stowage compartment ATA [EDW] switch
(with code 551)
ATA [EDW] hood switch (with code 551)
ATA [EDW] glove compartment switch (with code
551)
Trunk lid emergency release switch
ATA [EDW] trunk illumination switch
(with code 551)
Rotary tumbler/trunk lid microswitch
ATA [EDW] inclination sensor (with code 551)
CL [ZV] radio receiver (via interface)
Integrated crash sensor
Model 171
Rear SAM control unit
CAN signals
The rear SAM control unit with fuse and relay module
(N10/2) is a device on the CAN-B in the overall
network.
n00.19-P-0999SK Model 171.4
i Note
The fuel pump relay is mounted on the relay block
of the rear SAM control unit and is actuated via the
ME-SFI [ME] control unit. Current information can
be found in the documentation in WIS.
r47.20-P-2100-99TA
Overview of SAM Control Units/Current Passenger Car Model Series 2005 b
– This printout will not be recorded by the update service. Status: 08 / 2005 –
25
Model 171
Rear SAM control unit
Voltage supply for the following
control units
Wiring diagrams with pin/
connector assignments
• Circuit 30: Alarm signal horn with additional
battery (plug 4)
• Circuit 30: ATA [EDW] inclination sensor (plug 4)
• Circuit 30: UPCI [UHI] control unit (plug 9)
• Circuit 30: PTS control unit (plug 22)
• Circuit 30: Left antenna amplifier module (plug 23)
Current information on the wiring diagram and on the
connector assignments can be found in the documentation in WIS.
Fuse and relay assignments
Current information on the assignments can be found
in the documentation in WIS.
CAN connections
• CAN link between rear SAM control unit and CANB voltage distributor (plug 2)
• CAN: Audio gateway control unit (plug 11)
• CAN: PTS control unit (plug 12)
• CAN: Power soft top control unit (plug 18)
P54.21-2605-00
Connector assignment (bottom view) of rear SAM control unit with fuse and relay module (N10/2)
26
b Overview of SAM Control Units/Current Passenger Car Model Series 2005
– This printout will not be recorded by the update service. Status: 08 / 2005 –
Connector assignment (side view) of rear SAM control unit with fuse and relay module (N10/2)
Circuits and assignments
Model 171
Rear SAM control unit
P54.21-2606-00
Workshop Information System
(WIS)
Wiring diagrams and pin/connector assignments
Model 171
r54.21-P-2108TA Sheet 1
Fuse and relay assignments, model 171.4
n54.21-P-0800SK
r54.21-P-2108TB Sheet 2
Overview of SAM Control Units/Current Passenger Car Model Series 2005 b
– This printout will not be recorded by the update service. Status: 08 / 2005 –
27