The MDG 1 acts as the translator between your computer’s USB port and the tool's diagnostic plug. It is a ruggedized piece of hardware built to withstand the grime and vibration of a repair shop environment. Supported Tools
TS 420, TS 500i, and various high-end brushcutters.
At its core, the STIHL Diagnostic Software is a specialized computer program developed by ANDREAS STIHL AG & Co. KG. Its purpose is to facilitate in-depth analysis, troubleshooting, and adjustment of STIHL power tools. Unlike a simple multimeter, the software provides a guided, data-driven diagnostic experience. It communicates with an engine or battery analyzer (hardware) connected to the tool, interprets the results, and presents clear, actionable information directly on the technician's computer screen.
Attempting this without the software results in erratic running or a locked ECU. stihl diagnostic software 20
SDS 2.0 can be installed either from the original CD‑ROM or via an Internet download. The sequence of steps is critical:
Ensures that the M-Tronic system is running at peak efficiency, which maximizes fuel economy and power output. Compatibility: Which Tools Use This Software?
Provides printable diagnostic health certificates to show customers proof of tool condition and runtime hours. The MDG 1 acts as the translator between
: Authorized dealers can download the software directly from the STIHL Dealer Portal.
When a piece of equipment enters the shop with poor performance issues or intermittent shutdowns, SDS 2.0 simplifies the troubleshooting workflow:
The software cannot connect to a chainsaw or trimmer via a standard USB cable. It requires the hardware interface. The MDG 1 acts as a translator, converting data from the machine’s specific data bus into a format your computer can understand via USB or Bluetooth. Core Capabilities and Features At its core, the STIHL Diagnostic Software is
The software also differentiates between active faults (occurring now), sporadic faults (occurred but cleared), and stored faults (history). It provides plain-text descriptions and suggested test plans.
Future updates to SDS 2.0 will likely introduce enhanced support for:
The software and MDG 1 hardware are primarily sold and licensed to authorized STIHL servicing dealers.
STIHL occasionally releases ECU firmware to fix bugs, improve cold-start behavior, or optimize fuel efficiency. D.S. 20 downloads these updates from STIHL’s central server and flashes them onto the tool. This is a non-negotiable step when installing a new ECU or performing major repairs.