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THINKDIAG HML is a smart Vehicle Communication Interface (VCI) designed for heavy-duty 12V/24V vehicles. It operates diagnostics on over 74 truck brands in collaboration with the THINKTOOL Series. THINKDIAG HML requires THINKCAR tablet devices to function and cannot be used independently. Compatible with Thinkcar Platinum 391.
The THINKCAR THINKDIAG HML scanner tool adapter is a device that serves as a communication interface between your vehicle and the diagnostic tool. It reads the vehicle data and sends it to the diagnostic tool via Bluetooth, WIFI, or USB connection. The LED indicator on the device allows you to easily identify the working status of the module. This tool is ideal for mechanics who work on heavy-duty vehicles and require a simple yet powerful diagnostic tool.
OE-Level Diagnostics
Read & Clear DTC Codes
Data Stream
Bluetooth/USB Connection
13 Special Functions
Supports 74+ Truck Brands
Equipped with 13 Non-Standard Connectors
DPF Regeneration
Injector Coding
Reset Service (MIL)
Cruise Control
Vehicle Speed Controller
Air Conditioner
Oil Pressure Sensor
ABS
Automatic Transmission
Color: Black with Red
Product Type: OBD2 Scanner, Commercial Vehicle Scanner Tool
Working Voltage: 9~36V
Power: <3W
Compatible with 12V vehicles
Best For / User Type - Bluetooth Heavy Duty VCI | Commercial Truck & Bus Diagnostics via App
Core Diagnostic Capability - 74+ Major Heavy Duty Vehicle Brands | 12V & 24V Systems
Maintenance Reset Value - Full System Diagnostics: Engine, Trans, ABS & HD-Specific Systems
System Coverage - DPF-Related Maintenance Functions | Live Data | Fault Code Read & Clear
Ease of Use - Wireless Bluetooth | iOS & Android via ThinkDiag+ App
Vehicle Compatibility / Coverage - Compact – Easy to Carry for Fleet & Roadside Service
Ownership / Update Benefit - Annual Software Access Available"
Ease of Use
Skill Level - Intermediate to Advanced – For diesel technicians and fleet maintenance personnel.
Recommended For - Fleet technicians and commercial vehicle service professionals need wireless heavy-duty diagnostics from a smartphone.
Diagnostic Capabilities
Maintenance Resets - 10
Read & Clear DTCs - Yes
DPF Regeneration - Yes – DPF-related maintenance functions supported.
OBD2 & EOBD - Yes
Advanced Functions
Bi-Directional Control - No
Topology - No
TPMS - No
Heavy Duty Truck Diagnostics - Yes – Designed for heavy-duty commercial truck and bus diagnostics.
Hardware & Performance
App Required - Yes – ThinkDiag+ app required on iOS or Android.
VCI - Bluetooth Heavy Duty VCI
Connectivity
Wifi - No
Bluetooth - Bluetooth 4.0
USB Type - HD OBD Connector
Coverage
Supported Vehicle Years - Heavy-duty commercial vehicles (coverage varies by brand).
Supported Vehicle Brands - 74+ major commercial truck and bus brands (12V & 24V)
Supported Protocol - J1939, J1708/J1587, ISO 15765
Supported Languages - English, French, Spanish, German, Russian, Italian, Japanese, Portuguese
Software, Activation & Coverage
Subscription Required Software access requires a ThinkDiag+ subscription. Contact THINKCAR for current pricing.
Compatible with 12V and 24V commercial trucks and buses with standard heavy-duty OBD diagnostic ports. iOS 8.0+ and Android 5.0+ smartphones.
Not Compatible With - Standard 12V passenger vehicles with light-duty OBD2 ports
Function Notice - Functions and special services vary by vehicle. Contact support with the VIN to confirm compatibility before purchase.
Whats Included
ThinkDiag HML Bluetooth Adapter, Quick Start Guide"
We currently ship to the United States and Canada.
Canada: Please contact us directly to place your order. Shipping to Canada must be arranged over the phone.
We strive to get your equipment to you quickly and efficiently. Please note that order processing typically takes 1-2 business days, after which we will update you with tracking information.
For larger equipment/products, please allow 2-4 business days for pick and pack preparation. Once shipped, you will receive tracking information to stay up-to-date on the status of your order.
Small items (eg. Tablets & tools) | 3-5 business days
Large items (eg. Calibration Targets and Plates) | 5-8 business days
Full calibration packages | 8-10 business days
We want to ensure you're completely satisfied with your purchase. If you need to return an item, please contact our customer service team within 30 days of purchase. A 15% restocking fee will apply to all returns. The customer is responsible for return shipping costs. Refunds will be processed once the returned items are received and inspected at the warehouse.
All package sales are final due to the complexity of shipping the equipment. The total purchase price should be paid in full before shipment. When items are passed to the shipping carrier they are responsible for delivery. The equipment is covered solely by the manufacturer's warranty. The Buyer should inspect the equipment upon receipt and notify the Seller of any discrepancies as soon as possible. Let's get calibrating!
