ThinkDiag 2 All Systems Pro Tool for Android/iOS

ThinkDiag 2 is much more capable than a generic Bluetooth OBD2 adapter. A generic dongle usually reads only standard engine and emissions data. ThinkDiag 2 uses manufacturer diagnostic software to communicate with supported ABS, airbag, transmission, body, steering, battery and other control modules.

The phone provides the screen, processing and internet connection, while the ThinkDiag 2 interface handles communication with the vehicle. This keeps the hardware small but means a compatible mobile device and the ThinkDiag app are required.

Best Suited For

ThinkDiag 2 suits capable DIY users, mobile mechanics and light workshops that want broad diagnostic capability without carrying a separate scan tablet. It is a good choice when active tests, newer CAN-FD vehicles and selected coding are required and the user is comfortable with an annual software subscription.

What You Can See During Diagnosis

ThinkDiag 2 can read current, stored and pending fault codes where supported, display ECU identification information, show freeze-frame data captured when a fault was logged and graph live sensor values.

Live data can be used to compare wheel speeds, coolant temperature, fuel trims, airflow, throttle position, battery voltage, pressure sensors, switch status and other values. Several data items can be viewed together, which helps identify a sensor that disagrees with the rest of the system.

The app can also create a vehicle health report. This is useful when checking a recently purchased vehicle, recording faults before repairs or showing a customer which modules contained codes.

Bi-Directional Active Tests

Active testing allows the app to send commands to a supported control module rather than only reading information from it. This is one of the main differences between ThinkDiag 2 and a basic code reader.

Depending on the vehicle, tests may include operating the radiator fan, fuel pump, injector, electronic throttle, A/C clutch, horn, exterior lights, door locks, windows, mirrors, sunroof, EVAP valve or other actuators.

For example, if a radiator fan does not run when commanded, the fault may be in the fan, relay, power supply or wiring. If the fan operates through the scan tool but not during normal vehicle operation, the problem may instead involve a temperature input, control logic or another module.

Service and Maintenance Functions

Supported procedures may include:

• Oil Service Reset: Resets the maintenance reminder after an oil change.
• Electronic Parking Brake: Retracts or resets supported rear brake actuators during pad replacement.
• Battery Matching: Registers a replacement battery on vehicles that monitor battery age and capacity.
• Steering-Angle Calibration: Relearns the straight-ahead position after alignment, steering or suspension work.
• ABS Bleeding: Operates the ABS pump and valves during supported brake-bleeding procedures.
• DPF Regeneration: Requests a supported diesel particulate filter regeneration when vehicle conditions allow.
• Injector Coding: Enters replacement injector calibration codes where required.
• Throttle Relearn: Relearns a supported electronic throttle after cleaning or replacement.
• Gearbox Relearn: Resets or relearns selected transmission adaptations.
• TPMS Reset: Carries out supported tyre-pressure system resets or relearns.
• Air-Suspension Calibration: Calibrates selected ride-height systems.
• EGR and Other Adaptations: Performs selected relearn procedures after repairs.

The app may display additional service categories, but each function works only where the exact vehicle and control module support it.

Selected ECU Coding and Adaptations

ThinkDiag 2 can access selected coding and configuration functions. Depending on the vehicle, these may include replacement-module matching, adaptive-data resets and customisation of supported convenience features such as lighting behaviour, automatic locking, windows, displays, seats or climate settings.

CAN-FD Support

CAN-FD is a newer communication protocol used by selected later vehicles, particularly within newer General Motors platforms and an increasing number of other makes. The original ThinkDiag does not include this hardware.

CAN-FD support does not mean every function is available on every CAN-FD vehicle. It means the interface has the communication hardware required where Thinkcar provides compatible diagnostic software.

Phone, App and Internet Requirements

A compatible Android or iOS phone or tablet is required. The ThinkDiag app must be installed and an account created before the manufacturer software can be activated.

An internet connection is needed for initial setup, software downloads, updates and some online functions. Once the required vehicle software is downloaded, many normal diagnostic functions can be used without continuous internet access, although this can vary by feature.

Because the mobile device supplies the screen and battery, app compatibility should be considered when changing phones or operating-system versions in the future.