1. Introduction
The HUMZOR NC610 is a versatile 2-in-1 diagnostic scan tool designed for both OBDII-compliant vehicles (cars, light trucks, SUVs) and heavy-duty diesel trucks (J1939 protocol). This device integrates advanced diagnostic capabilities to help users quickly identify and resolve vehicle issues, read and clear diagnostic trouble codes (DTCs), monitor live data streams, and perform various system tests.

Figure 1.1: The HUMZOR NC610 scanner, illustrating its dual functionality for both car OBD2 and heavy-duty truck diagnostics.
2. Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always perform automotive testing in a safe environment.
- Wear safety eye protection that meets ANSI standards.
- Keep clothing, hair, hands, tools, test equipment, etc., away from all moving or hot engine parts.
- Operate the vehicle in a well-ventilated work area; exhaust gases are poisonous.
- Put blocks in front of the drive wheels and never leave the vehicle unattended while running tests.
- Use extreme caution when working around the ignition coil, distributor cap, ignition wires, and spark plugs. These components create hazardous voltages when the engine is running.
- The NC610 diagnostic tool does not require any battery or charger; it gets its power directly from the vehicle through the OBDII data link connector.
3. Package Contents
Verify that all items are present in the package:
- HUMZOR NC610 Main Unit
- OBDII 16-pin Connector Cable
- 9-pin Connector Cable (for heavy-duty trucks)
- Portable Tool Box
- User Manual (this document)
4. Product Overview
The HUMZOR NC610 features a robust design with a 2.8-inch LCD screen and intuitive button layout for easy navigation. It includes three fault indicator lights to provide immediate status feedback.

Figure 4.1: Front view of the HUMZOR NC610 diagnostic tool, showing the screen, control buttons, and included cables.
4.1 Interface and Indicators
- 2.8" LCD Display: Shows diagnostic information, menus, and data streams.
- Navigation Buttons: Up, Down, Left, Right, OK for menu navigation and selection.
- Return Button: Returns to the previous screen.
- Function Buttons (F1, F2): Context-sensitive functions.
- Fault Indicator Lights:
- Red: Indicates a memory code (permanent fault).
- Yellow: Indicates a gap code (intermittent fault).
- Green: Indicates no fault codes present.

Figure 4.2: Close-up of the fault indicator lights (red, yellow, green) on the NC610, providing quick visual status of vehicle diagnostics.
5. Setup
The NC610 is powered directly by the vehicle's OBDII port. No external power source or batteries are required.
5.1 Connecting to a Vehicle
- Locate the Diagnostic Link Connector (DLC):
For most OBDII-compliant vehicles (cars, light trucks, SUVs), the 16-pin DLC is typically located under the dashboard on the driver's side. For heavy-duty trucks, the 9-pin connector is usually found in the cab or near the engine compartment.
- Connect the Cable:
Select the appropriate cable (16-pin for cars, 9-pin for heavy-duty trucks) and firmly connect it to the vehicle's DLC. Then, connect the other end of the cable to the NC610 unit.

Figure 5.1: The NC610 showing both the 16-pin OBDII connector for cars and the 9-pin connector for heavy-duty trucks.
- Power On:
Once connected, the NC610 will automatically power on. The screen will display the main menu.
6. Operating Instructions
The NC610 offers a user-friendly interface for various diagnostic functions. Navigate through the menus using the arrow keys and confirm selections with the "OK" button.
6.1 OBDII/EOBD Diagnostics (for Cars)
This mode is compatible with most OBDII-compliant vehicles manufactured after 1996. It supports standard OBDII protocols including J1850 (PWM, VPW), ISO_9141-2, ISO_14230-4 (KWP, KWP-5BPS), and ISO_15765-4 (CAN, CAN-B, CAN-C, CAN-D).

Figure 6.1: Overview of the complete OBD2 function modes available for car diagnostics.
- Read DTCs:
Retrieves Diagnostic Trouble Codes (DTCs) from the vehicle's computer. This includes stored, pending, permanent, and recorded fault codes. Select "Read DTC" from the main menu and press OK. The device will display the codes and their descriptions.
- Clear DTCs:
Erases DTCs from the vehicle's computer and turns off the Check Engine Light (MIL). Select "Clear DTC" and confirm the action. Note: Clearing codes does not fix the underlying problem. Ensure the issue is resolved before clearing codes to prevent recurrence.
- Live Data Stream:
Displays real-time vehicle sensor data in text and graph formats. This allows for intuitive monitoring of various parameters such as engine RPM, vehicle speed, coolant temperature, and oxygen sensor readings. Select "Live Data" and choose "View All Items" or "View Graphic Items".

Figure 6.2: Example of live data stream display, showing real-time voltage monitoring.

Figure 6.3: Live data stream in chart view, displaying multiple engine parameters simultaneously.
- I/M Readiness Status:
Checks the readiness of the emission-related monitoring systems. This function is crucial for passing emission tests. Select "I/M Readiness" to view the status of various monitors (e.g., MIL, MIS, FUE, CCM, CAT, HCAT).

Figure 6.4: Screen displaying the I/M Readiness status, indicating whether emission monitors are complete or incomplete.
- Battery Test:
Performs a quick test of the vehicle's battery voltage (12V/24V). Select "Battery" from the main menu.
- Smog Check:
Provides information related to smog readiness, including stored, pending, and permanent trouble codes. Select "Smog Check" to access this feature.

Figure 6.5: Smog Check screen showing readiness status and fault code counts.
- DTC Query Library (Lookup):
Allows users to look up definitions of Diagnostic Trouble Codes (DTCs). Enter the DTC to view its description. The device contains a library of over 50,000 DTCs.

Figure 6.6: DTC Lookup screen, providing detailed descriptions for entered trouble codes.
- Data Playback:
Reviews previously recorded live data streams. This feature is useful for analyzing intermittent problems or comparing data over time.
- Fuel Test:
Provides specific diagnostic functions related to the vehicle's fuel system.

Figure 6.7: Visual representation of the fuel test function.
6.2 Heavy Duty (HD) OBD Diagnostics (for Trucks)
This mode supports the J1939 protocol and is suitable for heavy-duty trucks, engineering vehicles, agricultural vehicles, and buses with a 9-pin diagnostic interface. It is compatible with diesel engines from manufacturers such as Cummins, Caterpillar, Detroit, and Paccar.

Figure 6.8: Overview of diagnostic functions available for heavy-duty trucks.
The functions available for heavy-duty trucks are similar to OBDII/EOBD but tailored for truck systems:
- Read and Clear Engine Fault Codes: Accesses stored, intermittent, permanent, and recorded fault codes specific to heavy-duty diesel engines.
- Retrieve Vehicle Information: Displays VIN, calibration IDs, and other vehicle-specific data.
- Complete Data Streams: Provides real-time sensor data for truck components, allowing for detailed monitoring and analysis.
- Battery Test: Checks the battery voltage for heavy-duty vehicles.
Video 6.1: Demonstration of the HUMZOR NC610 performing diagnostic functions on both a car and a heavy-duty truck, including reading and clearing codes, and viewing live data streams.
Important Note: This product is designed for compatibility with most diesel vehicles, but it is not compatible with specific models such as Freightliner, International, Kenworth, Cascadia, Mercedes Benz V-Class, Volvo VNL, tractors, semi-trucks, and all trucks with a 6-pin connector.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your HUMZOR NC610.
- Cleaning: Use a soft, damp cloth to clean the tool's casing. Do not use abrasive cleaners or solvents.
- Storage: Store the device in its portable tool box in a dry, clean environment when not in use. Avoid extreme temperatures and direct sunlight.
- Cable Care: Inspect cables regularly for any signs of damage (fraying, cuts). Do not use damaged cables.
8. Troubleshooting
If you encounter issues while using the NC610, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. |
|
|
| "Link Error" or "Communication Error" message. |
|
|
| Cannot clear DTCs. |
|
|
9. Specifications
| Feature | Detail |
|---|---|
| Model | NC610 |
| Display | 2.8-inch LCD |
| Operating Voltage | 9V - 36V (via DLC) |
| Supported Protocols (Car) | J1850 (PWM, VPW), ISO_9141-2, ISO_14230-4 (KWP, KWP-5BPS), ISO_15765-4 (CAN, CAN-B, CAN-C, CAN-D) |
| Supported Protocols (Truck) | J1939 |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -20°C to 70°C (-4°F to 158°F) |
| Dimensions | Approx. 9.13 x 6.73 x 2.64 inches |
| Weight | Approx. 1.76 pounds |
| Supported Languages | English, German, Polish, Spanish, French, Italian, Russian, Chinese |

Figure 9.1: Approximate dimensions of the HUMZOR NC610 diagnostic tool.
10. Warranty and Support
HUMZOR provides technical support and customer service for the NC610 diagnostic tool.
- Technical Support: If you encounter any problems when using the NC610 professional scanning tool, you can directly contact HUMZOR through Amazon Support or send an email to the provided support address.
- Return Service: HUMZOR offers a hassle-free return service if you are not satisfied with the product. Contact customer service for assistance.

Figure 10.1: Image representing customer support availability for product inquiries.