Testing; Preparations - Stihl MS 661 Manual

8.2 Testing with
STIHL MDG 1
Always perform tests with the
STIHL MDG 1 engine analyzer.
The M-Tronic system can be tested
with the STIHL MDG 1 in
conjunction with a computer.
The diagnostic software for the
engine analyzer must be installed
on the computer. A STIHL Bluetooth
stick 5910 840 1500 must be
plugged into the computer's USB
port. The STIHL Bluetooth stick
guarantees the data transfer
between the STIHL MDG 1 and the
computer.
The diagnostic software guides the
user interactively in steps through
the entire test run. Malfunctions and
their sources in the STIHL M-Tronic
are taken into account and
displayed by the program during the
test run.
MS 661, MS 661 C-M
The STIHL MDG 1 engine analyzer
is now integrated in the ignition
circuit and connected to the control
unit and generator via the test
cable.
The STIHL MDG 1 comes with a
power supply unit which is also be
connected to the MDG 1.
There is an electronic module in the
STIHL MDG 1 for data transfer to
the bluetooth stick on the computer.
The engine analyzer is supplied
from the factory together with the
diagnostic program on a data carrier
for the computer. The diagnostic
program includes a database in
which the data of different power
tools is stored for the test run.
Depending on the production date
of the STIHL MDG 1 and the power
tool to be tested, it is possible that
the database may not up to date for
the power tool concerned. In such a
case the latest version of the
program can be downloaded from
the internet.
For further and more detailed
information on the STIHL MDG 1,
see the STIHL MDG 1 instruction
manual and Technical Information
bulletin TI 28.2011 which
accompanied the market launch.
– Test the control unit with the
STIHL MDG 1, b 8.3, b 7.2,
see also Troubleshooting Chart,
b 8.7
8.3

Testing

8.3.1

Preparations

Carry out the following operations
before starting the tests.
– Troubleshoot with aid of
troubleshooting chart, b 8.7
– Remove the shroud, b 6.4
– Remove the filter base, b 13.3
– Clean loose dirt from screw
connections, control unit, switch
unit, solenoid valve and
diagnostic socket.
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