ThinkCar HML 24V – Diagnostic Module for Commercial Vehicles
The ThinkCar HML 24V is an expansion module that extends the diagnostic capabilities of THINKTOOL EURO MASTER and EURO EXPERT 391 diagnostic tools to commercial vehicles. It enables diagnostics of trucks, vans, buses, trailers, as well as selected construction, agricultural and industrial machinery. The module allows technicians to diagnose vehicle electronic systems, read and clear fault codes, monitor live data and perform supported service and special functions. Communication between the diagnostic tool and the HML VCI interface is wireless via Bluetooth.
Diagnostic Capabilities
The ThinkCar HML module provides access to diagnostic functions in supported commercial vehicles.
Key features include:
- Read and clear Diagnostic Trouble Codes (DTCs) – identify fault codes stored in vehicle control units and clear them after performing diagnostics.
- Electronic system diagnostics – access supported vehicle control units and systems, including the engine, ABS and safety systems.
- Live Data – monitor real-time data transmitted by vehicle control units, including coolant temperature and engine operating parameters.
- Active tests – activate selected components to check their operation.
- Service functions – perform supported procedures, such as service interval resets, EPB functions and injector-related operations.
- Adaptations and special functions – perform supported adjustment and configuration procedures for vehicle components.
Supported Vehicle Brands
The module supports diagnostics for vehicles from manufacturers including:
- MAN
- DAF
- Mercedes-Benz
- Iveco
- Renault Trucks
- Volvo
- Scania
- Neoplan
For vehicles equipped with a 16-pin OBD II connector, basic engine diagnostic data may also be available, depending on the functions supported by the vehicle.

Compatible ThinkCar Diagnostic Tools
The HML module is designed to work with the following diagnostic tools:
- THINKTOOL EURO MASTER
- THINKTOOL EURO EXPERT 391
Software Updates
The ThinkCar HML module includes 12 months of free diagnostic software updates. After this period, purchasing further updates is optional. Additional updates are available in our store – ThinkCar Software Updates.
Key Information
- Manufacturer: ThinkCar
- Model: HML
- Voltage: 24 V
- Application: Trucks, buses, trailers, vans, and construction and agricultural machinery
- Communication: Bluetooth
- Compatibility: THINKTOOL EURO MASTER, EURO EXPERT 391
- Free software updates: 12 months
Also Available in Our Store
The ThinkCar HML module is an expansion accessory for compatible ThinkCar diagnostic tools. The diagnostic tool is not included in this offer. Before purchasing, make sure your diagnostic tool is compatible with the module.












