Overview - SMART 453 Series Introduction Into Service Manual

Overview

Along with increasing requirements, e.g. in the areas of
communication, diagnosis or vehicle safety, the data volume
which is exchanged between control units has also increased
proportionally.
However, finite installation space and efforts to lower ve-
hicle weight make conventional data transmission methods
impossible.
This is why the use of bus systems is required.
In the new smart, the vehicle electronics are networked via
the following data bus systems:
• Telematics CAN
• Interior CAN
• Drive train CAN
• Chassis CAN
• Front end CAN
• AC operation LIN
• Rain and light sensor LIN
• Additional instruments LIN
The data transfer rate of the CAN bus systems in the new
smart is 500 kBd.
Front compartment fuse box
Introduction of the New smart fortwo coupé and smart forfour | Model Series 453
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– This printout will not be recorded by the update service. Status: 06/2014 –
Gateway
Control units with gateway function are linked with two or
more data bus systems. This means that they can send and
receive signals to and from several bus systems.
Control units with gateway function:
• ME-SFI control unit
• Audio gateway control unit
• Electronic Stability Program control unit
• Telematics services communications module
• Distance warning function gateway
Fuses
The maxi and ATO fuses that are accessible for the customer
are located in the following positions in the vehicle:
• Fuse box in front compartment under service flap
• Fuse box in glove compartment
On-board electrical system battery
The 12 V on-board electrical system battery of size H5 is lo-
cated in front of the passenger compartment under the front
hood on all models.
Note
b
The procedures for disconnecting the battery are do-
cumented in the Workshop Information System (WIS).
Fuse box in glove compartment
Overall network
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