1. Introduction
This manual provides comprehensive instructions for the safe and effective operation of your THINKCAR ThinkCheck M70 OBD-II Diagnostic Scan Tool. The M70 is a universal diagnostic tool designed to assist in vehicle maintenance by reading and clearing fault codes, monitoring live data, and performing various service functions on OBD-II compliant vehicles.
Please read this manual thoroughly before operating the device to ensure proper usage and to prevent damage to the tool or your vehicle.
2. Safety Information
Always observe the following safety precautions when using the ThinkCheck M70:
- Ensure the vehicle's ignition is off before connecting or disconnecting the diagnostic tool.
- Do not operate the tool while driving.
- Wear appropriate eye protection when working on a vehicle.
- Keep the tool away from water, oil, and extreme temperatures.
- Do not attempt to disassemble or modify the tool. Refer all servicing to qualified personnel.
- The tool is designed for 12V vehicle battery systems only. Do not connect to other voltage systems.
3. Package Contents
Upon opening the package, please verify that all items are present and in good condition:
- THINKCAR ThinkCheck M70 Diagnostic Scan Tool
- OBD-II Diagnostic Cable (integrated)
- User Manual (this document)
4. Device Overview
The THINKCAR ThinkCheck M70 features a robust design with a 5-inch touch screen for intuitive navigation. The integrated OBD-II cable connects directly to your vehicle's diagnostic port.

Figure 4.1: Front view of the THINKCAR ThinkCheck M70 showing the 5-inch touch screen and main menu interface. The device has a rugged black casing and an integrated OBD-II cable extending from the top.

Figure 4.2: Back view of the THINKCAR ThinkCheck M70, displaying the product label with model information (TCM70), power input (9-18V), working current (1.2A), and manufacturer details.
Key Components:
- 5-inch Touch Screen: Primary interface for all operations.
- Integrated OBD-II Cable: Connects the tool to the vehicle's OBD-II port.
- Power Button: (Assumed, typically on side/top) For turning the device on/off.
- USB Port: (Assumed, for charging/data transfer if applicable)
5. Setup
Follow these steps to set up your ThinkCheck M70 for first use:
- Locate the OBD-II Port: The OBD-II port is typically located under the dashboard on the driver's side. Refer to your vehicle's owner's manual if you cannot find it.
- Connect the Tool: With the vehicle's ignition off, firmly plug the ThinkCheck M70's integrated OBD-II cable into the vehicle's OBD-II port.
- Power On: Turn the vehicle's ignition to the "ON" position (engine off). The ThinkCheck M70 should power on automatically. If not, press the power button (if available).
- Initial Setup (First Use):
- Select your preferred language.
- Connect to a Wi-Fi network for software updates. Navigate to "Settings" and then "Wi-Fi" to configure.
6. Operating Instructions
The ThinkCheck M70 operates on an Android-based system with a touch screen interface. Tap on icons to select functions.
6.1. Main Menu Functions
- Scan: Initiates a full system scan to identify diagnostic trouble codes (DTCs) across various vehicle modules (ECM, TCM, ABS, SRS, BCM, IC, AC).
- OBD: Accesses standard OBD-II functions, including:
- Read Codes: Displays current, pending, and permanent DTCs.
- Clear Codes: Erases DTCs from the vehicle's computer. Caution: Clearing codes without addressing the underlying issue will likely result in the codes reappearing.
- Live Data: Displays real-time sensor data from the vehicle.
- I/M Readiness: Checks the status of emission-related monitors.
- Freeze Frame: Shows engine conditions at the time a DTC was set.
- O2 Sensor Test: Retrieves O2 sensor monitoring test results.
- On-Board Monitor Test: Retrieves results for emission-related powertrain components.
- Component Test: Allows testing of specific components.
- Vehicle Information: Displays VIN, CID, CVN, etc.
- Maintenance & Service: Provides access to 5 lifetime free service reset functions. Specific functions may vary but typically include:
- Oil Reset: Resets the oil life reminder.
- EPB Reset: Resets the electronic parking brake after service.
- SAS Reset: Resets the steering angle sensor.
- BMS Reset: Resets the battery management system.
- TPMS Reset: Resets the tire pressure monitoring system.
Note: Always follow vehicle manufacturer's procedures when performing service resets.
- ThinkStore: Access to additional software or functions (if available).
- Update: Performs software updates via Wi-Fi. Ensure a stable internet connection for this process.
- ThinkFile: Manages saved diagnostic reports and data streams. Supports data record and playback.
- Repair Info: Provides DTC lookup and repair information.
- Setting: Configures device settings such as Wi-Fi, language, brightness, and system information.
6.2. AutoVIN Feature
The ThinkCheck M70 supports AutoVIN, which automatically identifies the vehicle's VIN (Vehicle Identification Number) upon connection, streamlining the diagnostic process.
6.3. Real-time Vehicle Battery Monitoring
The tool can monitor and graph the vehicle's battery voltage in real-time, providing insight into the battery's health during diagnostic procedures.
7. Maintenance
- Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the tool in a dry, cool environment, away from direct sunlight and extreme temperatures.
- Software Updates: Regularly check for and install software updates via Wi-Fi to ensure optimal performance and compatibility with the latest vehicle models.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. |
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| Communication error with vehicle. |
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| Software update fails. |
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9. Specifications
| Model: | ThinkCheck M70 (TCM70) |
| Display: | 5-inch Touch Screen |
| Operating System: | Android 7.0 |
| Internal Storage: | 16GB |
| Battery: | 6100mAh |
| Input Voltage: | 9-18V DC (via OBD-II) |
| Working Current: | 1.2A |
| Connectivity: | Wi-Fi |
| Supported OBD-II Protocols: | KWP2000, ISO9141, J1850 VPW, J1850 PWM, CAN |
| Dimensions: | Approximately 7 x 11 x 4 inches |
| Weight: | Approximately 2.72 pounds |
| Manufacturer Part Number: | 303020049 |
| UPC: | 850022568848 |
10. Warranty and Support
THINKCAR products are designed for durability and performance. For warranty information, please refer to the warranty card included with your product or visit the official THINKCAR website.
If you encounter any issues or have questions regarding the operation of your ThinkCheck M70, please contact THINKCAR customer support. Contact details can typically be found on the official THINKCAR website or within the device's "Settings" menu under "About" or "Support".
For the latest software updates and product information, visit: www.thinkcar.com







