Diagnostic functions

The Topdon One Plus offers diagnostic functions for all electronic vehicle systems and supports both basic OBD2 diagnosis and advanced system diagnosis at the brand level.

• Read and clear fault codes: Reading and clearing DTCs in all available vehicle systems.
• Live datastream: Real-time display of sensor and parameter data from the ECUs.
• EOBD diagnosis: Full support for generic EOBD/OBD2 modes for emission-related diagnosis.
• Bidirectional control: Controlling actuators and components to test operation and signals.
• Advanced OE Topology: Visual display of vehicle systems and their intercommunication.
• Topology Map: Graphical topology map of the vehicle's ECU architecture.

Service and maintenance functions

The diagnostic tool supports more than 50 service and maintenance functions. Available functions may vary by vehicle make, model, and year.

Engine and drivetrain

• Oil service reset: Resetting the oil service interval after an oil change.
• Throttle valve relearn: Learning the throttle valve position after cleaning or replacement.
• Camshaft relearn: Relearn procedure for camshaft position sensor.
• Injector coding: Coding injectors after replacement for correct injection quantities.
• Diesel particulate filter regeneration: Forcing a DPF regeneration to burn off accumulated soot.
• EGR valve relearn: Relearning the EGR valve after cleaning or replacement.
• Turbo relearn: Relearning a variable turbo after replacement.
• Adblue reset: Resetting the Adblue/SCR system after refilling or service.
• NOx sensor reset: Resetting NOx sensor values after replacement.
• Air-fuel ratio reset: Resetting lambda and fuel adaptation values.
• Cooling system bleeding: Procedure for bleeding the cooling system.
• Coolant service: Reset and service procedure for the coolant system.
• Start-stop system reset: Resetting the start-stop system.

Transmission and drivetrain

• Transmission adaptation: Adaptation of the automatic transmission after maintenance.
• High voltage system deactivate/activate: Safely turning the HV system on and off in hybrid and EV vehicles.
• Resolver sensor calibration: Calibration of the resolver sensor of the electric motor.

Brake and stability systems

• ABS brake system bleeding: Bleeding the ABS hydraulic system.
• Electronic parking brake service: Opening and closing the EPB for brake pad replacement.

Steering and chassis

• Steering angle sensor calibration: Calibration of the steering angle sensor (SAS) after alignment or repairs.
• Air suspension calibration: Calibration of the air suspension system.
• Tire pressure sensor reset: Resetting and relearning TPMS sensors.
• Tire size reset: Adjusting the tire size configuration in the ECU.

Body and comfort systems

• Window Calibration: Initializing and calibrating electric windows.
• Sunroof Initialization: Initializing the sunroof after battery or motor replacement.
• Seat Calibration: Calibration of electrically adjustable seats.
• Footwell Module Reset: Resetting the footwell/comfort module.

Electrical and safety systems

• Battery Registration: Registering a new battery in the energy management system.
• Airbag Reset: Clearing fault codes and resetting the airbag system.
• Adaptive Headlight Reset: Calibration of adaptive headlights.
• Rain and Light Sensor Calibration: Calibration of the rain and light sensor behind the windshield.

Other service and maintenance functions

• Odometer Reset: Resetting odometer data in the ECU.
• Speed Limiter and PTO Configuration: Configuration of speed limiter and power-take-off.
• Transport Mode: Activate or deactivate transport mode.

Special features and capabilities

The Topdon One Plus features several advanced functions that distinguish the device within the range.

• ECU Programming (4 Systems): Programming ECUs on 4 systems for BMW, Mercedes-Benz, and VAG.
• J2534 Pass-Thru Programming: Supports J2534 Pass-Thru for programming ECUs with OEM software.
• ECU Coding: Extensive ECU coding for BMW, Mercedes-Benz, VAG, Porsche, Nissan, PSA, Jaguar Land Rover, Ford, Volvo, and Toyota.
• Driver Preference (One-Click Customization): Customize vehicle settings with one click for BMW, Mercedes-Benz, VAG, Porsche, Nissan, PSA, Jaguar Land Rover, Ford, Volvo, and Toyota.
• TopFix AI: AI-supported repair assistant for diagnostic and repair advice.
• Security Gateway Access: Access to secured vehicle systems behind a Security Gateway.

Supported vehicle brands

The reader supports a wide range of vehicle brands worldwide, divided into the following regions.

• European: Abarth, Alfa Romeo, Aston Martin, Audi, Bentley, BMW, Bugatti, Citroën, Cupra, Dacia, DS Automobiles, Ferrari, Fiat, Iveco, Jaguar, Lamborghini, Lancia, Land Rover, MAN, Maserati, Maybach, Mercedes-Benz, Mini, Opel, Peugeot, Porsche, Renault, Rolls-Royce, Saab, Seat, Skoda, Smart, Vauxhall, Volvo, Volkswagen
• Asian: Acura, Daihatsu, Genesis, Honda, Hyundai, Infiniti, Isuzu, Kia, Lexus, Mahindra, Maruti Suzuki, Mazda, Mitsubishi, Nissan, Perodua, Proton, Scion, SsangYong, Subaru, Suzuki, Tata, Toyota
• American: Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, General Motors, GMC, Holden, Jeep, Lincoln
• Chinese: Aeolus, BAIC Motor, BYD, Chery, Denza, Dongfeng, Emgrand, Englon, Exeed, Geely, Gleagle, Great Wall, Hafei, Jetour, Karry, Maple, Maxus, MG, Rely, Riich, Roewe, Senova, Sokon, SWM, Venucia, Weiwang

Optional additions and expansions

The Topdon One Plus can be expanded with additional hardware to increase functionality.

Hardware modules and accessories

• BTMobile ProS: Bluetooth Battery tester for testing batteries and the charging/starting system (included as a free addition).

License information

The Topdon One Plus comes with 1 year of free software updates. Certain advanced functions and vehicle coverage depend on an active license. After the license expires, the device generally remains usable with the already installed software.

• License period: 1 year free software updates included with purchase.
• Software updates: Updates add new vehicles, systems, and functions.
• Advanced functions: Topology Map, ECU coding, ECU programming, Driver Preference, TopFix AI, and Security Gateway access require an active license.
• Always free functions: 50+ maintenance functions, bidirectional control, read/clear fault codes, live data stream, EOBD diagnosis, and IMMO remain always available.
• After license expiration: The diagnostic tool continues to work with existing functions and installed vehicle coverage.

Package Contents

• 1x Topdon One Plus diagnostic tool
• 1x ONE VCI interface
• 1x Diagnostic Extension Cable
• 1x Charger with EU and UK plug
• 1x USB-C to USB-C cable
• 1x USB-A to USB-C cable
• 1x Quick User Guide
• 1x Packing List
• 1x Gift Card (BTMobile ProS & TopScan Master)
• 1x BTMobile ProS Battery tester
• 1x TopScan Master
• 1x Storage case

Technical specifications