NEXAS NL101
NEXAS NL101 OBD2 Scanner with Battery Tester User Manual
Model: NL101 | Brand: NEXAS
Introduction
The NEXAS NL101 OBD2 Scanner with Battery Tester is a professional diagnostic tool designed to help you quickly identify and resolve vehicle issues. This device combines comprehensive OBD2 diagnostic functions with a reliable battery testing feature, making it an essential tool for both automotive enthusiasts and professional technicians. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your NL101 device.
What's in the Box
- 1 x NL101 OBD2 Scanner
- 1 x User Manual
- 1 x Protective Case
- 1 x USB Data Cable
Product Overview
The NEXAS NL101 features a 2.4-inch color screen, intuitive navigation buttons, and a robust design for durability. It offers a range of diagnostic capabilities and a dedicated battery testing function.

Image: The NEXAS NL101 OBD2 Scanner with its protective case, showing the device's screen and control buttons.
Key Features:
- Full OBD2 Functions: Supports all 10 OBD2 test modes for comprehensive vehicle diagnostics.
- Battery Tester: Monitors the health of 6V and 12V batteries, checking voltage before and after ignition.
- DTC Lookup Library: Provides detailed definitions and analysis for diagnostic trouble codes.
- Live Data Stream: Displays real-time engine parameters in text and graphic formats.
- Freeze Frame Data: Captures a snapshot of vehicle conditions when a fault code is set.
- I/M Readiness: Checks if your vehicle is ready for emissions testing.
- User-Friendly Interface: 2.4-inch color screen with intuitive navigation.
- Lifetime Free Updates: Connects to a PC for software upgrades.

Image: The NEXAS NL101 screen showing the menu for various OBD2 functions, including Read Codes, Clear Codes, I/M Readiness, Freeze Frame, and Live Data.
Setup and Connection
Follow these steps to connect your NEXAS NL101 to your vehicle:
- Locate the OBD2 Port: The OBD2 port is typically located under the dashboard on the driver's side of the vehicle. Ensure the port is clean and free from obstructions.
- Connect the Scanner: Plug the NL101's OBD2 connector firmly into the vehicle's OBD2 port. The device will power on automatically.
- Turn on Ignition: Turn the vehicle's ignition key to the "ON" position. Do not start the engine unless instructed by a specific diagnostic procedure.
- Establish Communication: The scanner will automatically attempt to establish communication with the vehicle's onboard computer. Once connected, the main menu will appear.

Image: A visual guide demonstrating the connection process: checking the OBD2 port, plugging in the device, turning on the ignition, and selecting functions.
Operating Instructions
1. OBD2/EOBD Diagnostics
This mode allows you to access various diagnostic functions related to the vehicle's engine and emissions system.
- Read Codes: Retrieves Diagnostic Trouble Codes (DTCs) from the vehicle's computer. These codes indicate specific issues detected by the system.
- Erase Codes: Clears DTCs from the vehicle's computer and turns off the Check Engine Light (MIL). Ensure the underlying issue is resolved before clearing codes.
- Live Data: Displays real-time operational parameters of the vehicle, such as engine RPM, vehicle speed, oxygen sensor readings, and coolant temperature. This data can be viewed in text or graphical format.
- Freeze Frame: Records a snapshot of sensor data at the moment an emission-related fault occurred. This helps in diagnosing intermittent problems.
- I/M Readiness: Checks the status of various emission-related monitors to determine if the vehicle is ready for an emissions test.
- O2 Sensor Test: Retrieves O2 sensor monitoring test results for the most recently completed tests.
- On-Board Monitor Test: Retrieves results for on-board diagnostic monitoring tests of specific components/systems.
- Component Test: Allows initiation of a leak test for the vehicle's EVAP system.
- Vehicle Information: Retrieves the Vehicle Identification Number (VIN), Calibration ID (CALID), and Calibration Verification Number (CVN).

Image: The NEXAS NL101 screen illustrating the process of turning off the Check Engine Light (MIL) and erasing engine fault codes after a repair.

Image: The NEXAS NL101 screen showing live data streams in a graphical representation, including parameters like LOAD-PCT, ECT, and SHRTFT1.
2. Battery Test
The NL101 can perform a quick battery health check for 6V and 12V batteries. This function assesses the battery voltage before and after ignition to determine its charge level and the alternator's charging capability.
- Navigate to the "Batt Check" option from the main menu.
- The device will display the current battery voltage and provide an assessment (e.g., "Normal," "Slightly Low," "Too Low," "Too High").
- Interpret the results to understand if your battery has sufficient power to start the engine or if there are charging system issues.

Image: The NEXAS NL101 screen displaying battery test results, indicating battery voltage and status.
3. DTC Lookup
When a Diagnostic Trouble Code (DTC) is retrieved, you can use the built-in DTC Lookup library to understand its meaning and potential causes.
- Select "DTC Lookup" from the main menu.
- Enter the 5-character DTC using the device's navigation buttons.
- The device will display a detailed description of the code, helping you diagnose the issue.

Image: The NEXAS NL101 screen demonstrating the "Help" button functionality, which provides explanations for DTCs, Freeze Frame data, and Live Data streams.
Maintenance
- Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the device in its protective case in a dry, cool environment away from direct sunlight and extreme temperatures.
- Cable Care: Avoid bending or twisting the OBD2 cable excessively. Inspect the cable and connectors regularly for any damage.
Troubleshooting
- Device Does Not Power On:
- Ensure the OBD2 connector is securely plugged into the vehicle's port.
- Verify the vehicle's ignition is in the "ON" position.
- Check the vehicle's OBD2 port for any damage or debris.
- Communication Error:
- Confirm the vehicle is OBD2 compliant (most US vehicles after 1996, EU after 2002, Asian after 2006).
- Turn off the ignition, disconnect the scanner, wait 10 seconds, then reconnect and try again.
- Ensure the vehicle's battery has sufficient charge.
- Codes Cannot Be Cleared:
- Diagnostic Trouble Codes (DTCs) can only be cleared after the underlying vehicle fault has been resolved. Clearing codes without fixing the issue will result in the codes reappearing.
- Ensure the ignition is "ON" and the engine is off when attempting to clear codes.
- Inaccurate Battery Test Results:
- Ensure the battery terminals are clean and connections are secure.
- Perform the test with the vehicle's engine off and all accessories turned off for accurate static voltage readings.
Specifications
| Feature | Detail |
|---|---|
| Model | NL101 |
| Brand | NEXAS |
| Product Dimensions | 4.72"L x 6.69"W x 2.36"H |
| Item Weight | 13.8 ounces |
| Operating System | Car Computer |
| Automotive Fit Type | Universal Fit |
| Voltage | 12 Volts |
| UPC | 739810872056 |
Vehicle Compatibility
The NEXAS NL101 OBD2 Scanner is designed for broad compatibility:
- American Models: Compatible with vehicles manufactured after 1996.
- European Models: Compatible with vehicles manufactured after 2002.
- Asian Models: Compatible with vehicles manufactured after 2006.
This includes most cars, SUVs, pickups, and light trucks. For specific compatibility concerns, please refer to your vehicle's manual or contact NEXAS support.

Image: An illustration showing the extensive vehicle coverage of the NEXAS NL101, including US cars (1996-Now), EU cars (2002-Now), and Asian cars (2006-Now).
Software Updates
The NEXAS NL101 offers lifetime free software updates to ensure compatibility with new vehicle models and to introduce new features. To update your device:
- Download the update tool from the official NEXAS website (www.nexastech.com).
- Connect the NL101 to your computer using the provided USB data cable.
- Run the update tool on your computer and follow the on-screen instructions to complete the update process.

Image: A step-by-step visual guide for updating the NEXAS NL101 software by connecting it to a PC via USB and using the update tool.
Legal Disclaimer
Please read the following important information:
- NEXAS NL101 is suitable for U.S. models manufactured after 1996, Asian models after 2006, and European models after 2002. If you are unsure about compatibility, please contact NEXAS support before purchasing.
- This device is an engine fault code reader and does not support reading systems like ABS, SRS, or the transmission system.
- Fault codes read by the device can only be cleared after the vehicle's underlying trouble has been resolved; the device itself does not support fixing the car's problems.
- Usage: Confirm compatibility - Check that the car OBD port is intact - Plug in the product - Turn ignition switch to 'ON', ensure connection and power - Read engine fault codes.