Diagnosis - SMART Series 451 Service Manual

SN_Typ 451_us.book Seite 26 Freitag, 30. November 2007 1:56 13

Diagnosis

General
The network architecture in model 451 allows external
access to individual control units in the CAN bus
system.
Data link connector
The CAN bus is accessed by means of a diagnostic
tester that is connected to the vehicle via the data link
connector. The data link connector is linked directly
to the CAN bus and can therefore access all the
control units that have diagnostic or programming
capability. The data link connector is located in the
vehicle interior on the underside of the instrument
panel on the driver side.
Location of data link connector (X11/4)
26 Introduction of the smart fortwo, Model Series 451
Diagnostic tester
By connecting the diagnostic tester, the vehicle with
all its equipment variants can be precisely identified.
This enables accurate fault evaluation and rectifica-
tion and the analysis of vehicle-specific values and
parameters.
P54.22-2048-00