Topdon One Plus | Diagnostic Tool | Car

Diagnostic functions

The Topdon One Plus offers diagnostic functions for all electronic vehicle systems and supports both basic OBD2 diagnostics and extended brand-level system diagnostics.

• Read and clear fault codes: Reading and clearing DTCs across all available vehicle systems.
• Live data stream: Real-time display of sensor and parameter data from the ECUs.
• EOBD diagnostics: Full support for generic EOBD/OBD2 modes for emissions-related diagnostics.
• Bidirectional control: Actuation of actuators and components for testing operation and signals.
• Advanced OE Topology: Visual representation of vehicle systems and their communication.
• Topology Map: Graphical topology map of the vehicle's ECU architecture.

Service and maintenance functions

The diagnostic scanner supports more than 50 service and maintenance functions. Available functions may vary depending on vehicle brand, model and year of manufacture.

Engine and drivetrain

• Oil service reset: Reset the oil service interval after an oil change.
• Throttle valve learning: Teach throttle valve position after cleaning or replacement.
• Camshaft learning: Learning procedure for camshaft position sensor.
• Injector coding: Code injectors after replacement for correct injection quantities.
• Particulate filter regeneration: Force DPF regeneration to burn accumulated soot.
• EGR valve learning: Learn EGR valve after cleaning or replacement.
• Turbo learning: Learn variable turbo after replacement.
• Adblue reset: Reset the Adblue/SCR system after topping up or service.
• NOx sensor reset: Reset NOx sensor values after replacement.
• Air-fuel ratio reset: Reset lambda and fuel adaptation values.
• Cooling system bleeding: Procedure for bleeding the cooling system.
• Coolant service: Reset and service procedure for the cooling system.
• Start-stop system reset: Reset the start-stop system.

Transmission and drivetrain

• Transmission adaptation: Adaptation of automatic transmission after maintenance.
• High-voltage system deactivation/activation: Safe switch-off and switch-on of the HV system in hybrid and EV vehicles.
• Resolver sensor calibration: Calibration of the electric motor resolver sensor.

Brake and stability systems

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

Steering and chassis

• Steering angle sensor calibration: Calibration of the steering angle sensor (SAS) after alignment or service.
• Air suspension calibration: Calibration of the air suspension system.
• Tyre pressure sensor reset: Reset and teach TPMS sensors.
• Tyre size reset: Adjust tyre size configuration in the ECU.

Body and comfort systems

• Window calibration: Initialisation and calibration of electric windows.
• Sunroof initialisation: Initialise the sunroof following battery or engine replacement.
• Seat calibration: Calibrate electrically adjustable seats.
• Footwell module reset: Reset the footwell/comfort module.

Electrical and safety systems

• Battery registration: Registering a new battery in the energy management system.
• Airbag reset: Clear fault codes and reset the airbag system.
• Adaptive headlight reset: Calibrate adaptive headlights.
• Rain and light sensor calibration: Calibrate the rain and light sensor behind the windscreen.

Other service and maintenance functions

• Odometer reset: Reset odometer data in the ECU.
• Speed limiter and PTO configuration: Configure speed limiter and power take-off.
• Transport mode: Enable or disable transport mode.

Special features and capabilities

The Topdon One Plus is equipped with various advanced features that distinguish it within the product range.

• ECU programming (4 systems): Programme ECUs across 4 systems for BMW, Mercedes-Benz and VAG.
• J2534 Pass-Thru programming: Supports J2534 Pass-Thru for programming ECUs with OEM software.
• ECU coding: Comprehensive ECU coding for BMW, Mercedes-Benz, VAG, Porsche, Nissan, PSA, Jaguar Land Rover, Ford, Volvo and Toyota.
• Driver Preference (One-Click Customization): Adjust vehicle settings at the touch of a button for BMW, Mercedes-Benz, VAG, Porsche, Nissan, PSA, Jaguar Land Rover, Ford, Volvo and Toyota.
• TopFix AI: AI-powered repair assistant for diagnostic and repair advice.
• Security Gateway access: Access secure vehicle systems behind a Security Gateway.

Supported vehicle brands

The diagnostic device supports a wide range of vehicle makes globally, divided across 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 enhance functionality.

Hardware modules and accessories

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

Licence information

The Topdon One Plus comes with 2 years of free software updates. Certain advanced features and vehicle coverage depend on an active subscription. After the subscription expires, the device typically remains usable with the already installed software.

• Subscription period: 2 years of free software updates included with purchase.
• Software updates: Updates add new vehicles, systems and features.
• Advanced features: Topology Map, ECU coding, ECU programming, Driver Preference, TopFix AI and Security Gateway access require an active subscription.
• Always free features: 50+ maintenance functions, bidirectional control, read/clear fault codes, live data stream, EOBD diagnostics and IMMO remain always available.
• After subscription expires: The diagnostic device continues to work with existing features and installed vehicle coverage.

Package contents

• 1x Topdon One Plus diagnostic device
• 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 Carry case

Technical specifications