Nextech Car Scan: Your Comprehensive Guide to the NEXTECH OBD II 4G/GPS Tracking Device

INTRODUCTION:

The NEXTECH OBD II 4G/GPS Tracking Device is a versatile tool that combines advanced GPS tracking with car diagnostic capabilities. This device integrates GPS and 2G GSM / 3G WCDMA / 4G LTE modules with an OBD II interface, supporting a range of protocols including ISO15765-4, KWP2000:IS014230-4, ISO9141-2, J1850VPW, and J1850PWM. It allows users to monitor their vehicle’s location in real-time on a website, review historical tracking data, and even access location via a map link without needing a dedicated platform. Installation is straightforward – simply plug the tracker into your car’s OBD socket. A built-in shock sensor manages power and internet data usage efficiently.

Alt text: Nextech OBD II 4G/GPS Tracking Device product shot showcasing its compact design and OBD connector.

Leveraging GPS and 2G/3G/4G LTE networks, the tracker transmits location data to a server, enabling users to access www.nextechgps.com through any internet-connected computer. By logging in with their credentials, users can perform various functions such as real-time location tracking, history playback, and generate alarms and running reports. This functionality is invaluable for alarm systems, fleet management, and anti-theft measures. Mobile access is also supported through dedicated Android and iPhone iOS apps, mirroring the website’s features for on-the-go vehicle monitoring.

Beyond tracking, this device functions as a “Nextech Car Scan” tool, offering diagnostic insights into your vehicle’s health. It can send diagnostic trouble codes (DTCs) and car status information via SMS, directly from the OBDII interface. This feature is particularly useful for vehicle owners and maintenance professionals, providing immediate data to understand and address car issues. Whether for personal car security, business fleet oversight, or driver management, the NEXTECH GPS tracker is adaptable for cars, company vehicles, buses, taxis, trucks, and more. For detailed instructions and advanced operations, the user manual is available for download and online viewing at www.nextechgps.com.

PRODUCT OVERVIEW:

Alt text: Overview diagram of the Nextech OBD II 4G/GPS Tracking Device highlighting its key components and functionalities.

This section provides a visual guide to the device’s components and their roles, setting the stage for a deeper dive into its features and operational capabilities.

FEATURES:

The NEXTECH OBD II 4G/GPS Tracking Device is packed with features designed for comprehensive vehicle monitoring and diagnostics:

• Global Network Compatibility: Operates on 2G/3G/4G networks globally, ensuring wide coverage and reliable connectivity.
• Dual Channel Can Bus Interface: Offers two channels for Can Bus interface, enhancing its diagnostic capabilities and compatibility with vehicle systems.
• OBD Interface – DIV, No Installation Needed: Features an OBD interface for direct plug-and-play installation, eliminating the need for complex wiring or professional installation. This makes it an accessible “nextech car scan” tool for all users.
• Diagnostic Car Status: Provides car status diagnostics, which can be accessed via SMS or through the website platform, offering insights into vehicle health and performance.
• Automatic APN & Internet Settings: Automatically downloads and configures APN and internet settings, simplifying the setup process for users.
• Multi-Platform Location Access: Supports location tracking via App (Android & iPhone), Web platform, and SMS, giving users flexible access options.
• Built-in Battery: Includes a built-in battery that enables power down and removal alarms, enhancing security and tamper detection.
• Integrated Shock Sensor: Equipped with a shock sensor to detect vehicle movement and shocks, triggering alarms for enhanced security.
• Shock Sensor Controlled Uploading: Utilizes the shock sensor to control data uploading, optimizing car battery power usage and data consumption.
• Open Protocol: Features an open protocol, facilitating integration with third-party client platforms for customized applications.
• Customizable Functionality and Protocol: Allows for function and protocol customization based on client requests, offering flexibility for specific needs.
• Wide Voltage Range: Operates within a wide voltage range of 9-40V DC, making it suitable for various vehicle types.

LED INDICATOR DESCRIPTION:

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INSTALLATION:

Installing the NEXTECH OBD II 4G/GPS Tracking Device is designed to be user-friendly. Follow these steps for a quick and easy setup:

1. SIM Card Installation (Micro SIM Only):
   • Ensure the tracker is powered off before inserting or removing the SIM card.
   • This device requires a Micro SIM card with 2G GSM, 3G WCDMA, or 4G LTE network compatibility. CDMA networks are not supported.
   • Insert the Micro SIM card into the tracker as indicated, with the metal pins facing down. Push until it locks into place.
   • To remove the SIM card, push it in again to release it from the holder.

Alt text: Diagram showing the Micro SIM card insertion process for the Nextech OBD II 4G/GPS Tracker, emphasizing correct orientation.

• Note: Micro SIM is required for this device. Ensure your SIM card has an active data plan for internet connectivity, essential for real-time tracking and “nextech car scan” data transmission.

2. Powering ON/OFF:

   • Power ON: Simply insert the tracker into the vehicle’s OBD socket. It will power on automatically.
   • Power OFF: Removing the tracker from the OBD socket will trigger a power down alarm to be sent to the server. The internal battery will provide power for approximately 0.5-1 hour before the device automatically powers off completely.

3. Tracker Placement:

   • The OBD socket is typically located under the dashboard on the driver’s side. Insert the NEXTECH tracker directly into this socket for installation.

4. Antenna Considerations:

   • The 2G/3G/4G and GPS antennas are integrated within the tracker. Be aware that large metal objects or the car panel itself can weaken GSM and GPS signals.
   • For optimal GPS signal reception, the antenna should ideally face upwards, towards the sky, and not downwards towards the ground.
   • In locations with poor GPS reception via the OBD interface, consider using an external OBD extension cable to reposition the tracker for better signal.

Alt text: Illustration of OBD socket location in a car and recommended orientation for Nextech GPS tracker installation to optimize signal reception.

5. Factory Reset:

   • To reset the device to its factory default settings, send the SMS command factory*12345678 to the tracker.
   • Note: A factory reset will erase all user settings, including IP, APN, internet configurations, language, timezone, and alarm settings. It will revert the device to a new-product state with default password 123456 and cancellation of all authorized phone numbers and alarm configurations. Reconfiguration of IP/APN/internet settings will be necessary post-reset.

6. Operating Temperature:

   • The device is designed to operate between -20°C to 60°C (-4°F to 140°F). Operation outside this range may affect performance.
   • Storage temperature range is -40°C to 80°C (-40°F to 176°F).

OPERATING THE DEVICE:

Initial Preparations:

1. SIM Card Requirement: You will need an active Micro SIM card with a 2G GSM, 3G WCDMA, or 4G LTE mobile phone service plan that includes data for internet access. Ensure the SIM card is activated and has sufficient balance.
2. SIM Card Installation: Correctly insert the SIM card into the NEXTECH tracker as described in the Installation section.
3. Device Power Up: Plug the tracker into the car’s OBD socket to power it on.
4. LED Indicator Check: Observe the LED indicators. A green LED flashing once every few seconds indicates mobile and GPS signal reception. A red LED flashing once signifies successful location data upload to the server. Refer to the LED indicator description section for more details.
5. Troubleshooting Server Connection: If the red LED flashes twice, it indicates a failure to upload location data to the server. This often points to incorrect APN or internet user credentials.
   • Contact your SIM card provider to obtain the correct APN, username, and password settings.
   • Send SMS commands to the tracker to set these parameters. Use APN*12345678*apnname and USERNAME*12345678*username*password. Replace apnname, username, and password with the values from your provider. (Refer to “TRACKER SETTINGS” section for command details).
   • To check the current APN auto-configuration status, send SMS CHECK*12345678 to the tracker.
6. Accessing the Tracking Platform: Visit www.nextechgps.com and select your preferred language. Log in using your username and password.
   • Your username is the last 7 digits of the tracker’s ID (e.g., if ID is 83020208881688, the username is 8881688).
   • The initial default password is 8881688 or 123456. It is recommended to change your password after the first login.
   • On the platform, you can view the current location, playback history, and customize settings.
7. Mobile App Access: The same login credentials are used for both the website and the mobile app.
   • To download the app, visit www.nextechgps.com on your mobile browser and click the app icon on the login page, or scan the QR code provided there. Apps for both iPhone and Android are available. Consult the platform operation guide for app-specific instructions.
8. Fleet Management Setup: For users managing multiple vehicles, fleet accounts can be created for streamlined management. Contact your distributor to set up a fleet account.
9. OBD Information and Operations: For instructions on checking OBD information and other device operations, refer to the following sections of this guide. The “nextech car scan” feature is accessible via both SMS and the web platform.

Location Instructions:

1. SMS Location Request:
   • Send SMS URL*12345678 to the tracker. URL is the command, and 12345678 is the password.
   • Upon successful operation, the tracker will reply with a text message containing a map link to the vehicle’s current location. Clicking this link will display the location on a map.
2. Arming Shock Alarm via SMS:
   • Send SMS ARM*12345678 to the tracker (ARM is the command, 12345678 is the password).
   • Confirmation message “Set Shock Alarm ON” indicates successful arming. An incorrect password will result in “Wrong Password” reply.
   • Once armed, the shock sensor monitors for significant shocks (continuous shock is required to prevent false alarms).
   • If triggered, the tracker sends alarm and location information via SMS to authorized phone numbers and to the website server.
   • The tracker will attempt to call authorized numbers A, B, then C sequentially. If none answer after three attempts, calling will stop.
   • In case of continuous triggering, each authorized number will receive a maximum of 3 alarm SMS messages per hour.
   • Authorized users can also arm the system by sending ARM# from their authorized phone.
3. Disarming Shock Alarm via SMS:
   • Send SMS DISARM*12345678 to disarm the shock alarm (DISARM is the command, 12345678 is the password).
   • Confirmation message “set Shock Alarm OFF” indicates successful disarming. Incorrect password results in “Wrong Password”.
4. Checking Vehicle OBD Information via SMS (Nextech Car Scan via SMS):
   • With the car engine running, send SMS OBD*12345678 to the tracker (OBD is the command, 12345678 is the password).
   • The tracker will respond with OBD and car status information. Incorrect password will result in “Wrong Password”.
   • Example OBD information: “Number of DTCs:1,P0340,Car voltage:13V”. Consult your vehicle owner’s manual for detailed DTC information. This SMS command allows for a quick “nextech car scan” to check for basic OBD data.
5. Checking Vehicle OBD Information via Website (Advanced Nextech Car Scan):
   • Log in to www.nextechgps.com.
   • Select your device, and in the device menu, click “More,” then “OBD.”
   • In the OBD diagnosis window, click “Query OBD” and confirm with “OK” on the command sent message.
   • After a short delay, the system will retrieve and display OBD information, including VIN code, fault codes, RPM, speed, mileage, fuel level, voltage, fuel consumption, and other engine parameters, along with device software version, GPS and network signal strength, SIM card CCID number, and device parameter information.
   • Note: Website OBD query is currently not supported on the mobile app. The availability of specific OBD parameters depends on the vehicle model. Some vehicles may only provide a limited set of queryable parameters. The website will only display the parameters successfully retrieved. This web interface offers a more comprehensive “nextech car scan” compared to SMS.

TRACKER SETTINGS:

Setting APN & Internet User Name & Password:

The tracker is designed to automatically download and configure APN and internet settings upon power up. However, if automatic configuration fails or is incorrect (indicated by red LED flashing twice), manual setup is required. To verify auto-configuration, send SMS CHECK*12345678 to the tracker. If manual setting is needed, obtain the correct APN, username, and password from your SIM card provider and use the following SMS commands:

• Set APN: Send SMS APN*12345678*apnname (replace apnname with your APN value). Confirmation SMS “APN: apnname” will be sent upon success.
• Set Username & Password: Send SMS USERNAME*12345678*username*password (replace username and password with your provider values). Confirmation SMS “Username: username, Password: password” will be sent if successful. “Wrong Password” message indicates an incorrect tracker password was used.

Checking Tracker ID:

The tracker ID, essential for platform login and identification, is printed on the device label as the SIN number. If the label is inaccessible, retrieve the ID by sending SMS ID*12345678 to the tracker. The response SMS will be in the format “ID: 830201512345678” (example ID). The last 7 digits of this ID serve as both the username and default password for the tracking platform.

Setting Server IP:

The default server IP address is pre-configured at the factory as 58.64.155.133,8011. It is generally not necessary to change this unless instructed due to server upgrades or if you need to direct data to a different server. To change the server IP, send SMS IP*12345678*58.64.155.133,8011 (replace the IP address and port as needed). Confirmation SMS “IP: 58.64.155.133,8011” will confirm the change. Always refer to website notices for any IP address updates.

Adding, Deleting, and Checking Authorized Numbers:

Authorized phone numbers are crucial for receiving alarm notifications via SMS and for executing certain commands. Up to three authorized numbers (A, B, C) can be set.

• Adding Authorized Number: Send SMS ADD PHONE*12345678*A*number (replace A with the position A, B, or C, and number with the phone number). Confirmation SMS “Add Authorized Phone OK” will be sent on success.
• Deleting Authorized Number: Send SMS DELETEPHONE*12345678*A (replace A with the position A, B, or C). Confirmation SMS “Delete Authorized Phone OK” will confirm deletion.
• Checking Authorized Numbers: Send SMS CHECKPHONE *12345678. The tracker will reply with a SMS listing the currently authorized phone numbers (e.g., “Authorized Phone A: 13987654321, B:13876543210, C:13765432101”).

Changing Tracker Password:

To enhance security, change the default tracker password. Send SMS CHANGEPASSWORD*12345678*888888 (replace 12345678 with the old password and 888888 with the new password). Upon successful change, a confirmation SMS “New Password: 888888” will be sent to all authorized numbers. Note: Password changes can only be initiated from an authorized phone number.

Checking Tracker Password:

To verify the current tracker password, send SMS CHECKPASSWORD from an authorized phone. The tracker will respond with “Password888888” (example password). Only authorized phones can check or change the password.

Setting Alarm by Calling: ON/OFF:

Configure whether the tracker should make phone calls to authorized numbers upon alarm triggers.

• Alarm Call ON: Send SMS CALLON*12345678. Confirmation SMS “Alarm by calling : ON” will be sent.
• Alarm Call OFF: Send SMS CALLOFF*12345678. Confirmation SMS “Alarm by calling : OFF” will be sent.
• Default setting is Alarm by calling: ON.

Setting Alarm by SMS: ON/OFF:

Control SMS alarm notifications to authorized numbers upon alarm events.

• Alarm SMS ON: Send SMS SMSON*12345678. Confirmation SMS “Alarm by SMS : ON” will be sent.
• Alarm SMS OFF: Send SMS SMSOFF*12345678. Confirmation SMS “Alarm by SMS : OFF” will be sent.
• Default setting is Alarm by SMS: ON.

Setting Upload Time Interval:

Adjust the frequency of location data uploads to the server. Shorter intervals provide more frequent updates but consume more data and battery.

• Send SMS INTERVAL*12345678*xxx (replace xxx with the desired interval in seconds, from 30 to 999). Confirmation SMS “Set Interval xxx OK” will be sent.
• Default interval is 30 seconds. Longer intervals conserve battery and data but may reduce tracking accuracy and increase mileage error.

Checking Tracker Settings:

To get a comprehensive status report of the tracker’s current settings and status, send SMS CHECK*12345678. The tracker will respond with detailed information including software version, ID S/N, IP address, authorized numbers, GPS and GSM signal strength, and more (example: “V Mar 03 2020, CC888, CC0830C00820800, 58.64.155.133,8011, 30,A:13987654321, B:13876543210, GPS OK, +00, -95dBm, ShockControl, CMNET, User,Password, 46000, eld/24a0, 93%”). This command is useful for diagnosing issues and verifying configurations.

Resetting the Tracker:

To reboot the tracker, send SMS RESET*12345678. The tracker will power cycle and send confirmation “Cancel all alarm setting and re-power on”. Use this command if the tracker is malfunctioning.

Factory Reset (Restoring Default Settings):

To revert the tracker to its factory default state, send SMS FACTORY*12345678. This command will erase all user settings and reboot the device with factory configurations, as indicated by the confirmation SMS “setting back to factory default”. You will need to reconfigure settings like APN, IP, and authorized numbers after a factory reset.

PLATFORM OPERATION GUIDE:

Note:

1. SIM Card PIN Code: Ensure the SIM card’s PIN code is disabled. If a PIN is enabled, the tracker may fail to connect to the GSM network, and the green LED will remain continuously on.
2. Network Compatibility: This tracker operates on 2G GSM, 3G WCDMA, and 4G LTE networks and transmits data via the internet. CDMA networks are not supported. 4G SIM cards must be compatible with 2G GSM or 3G WCDMA networks to function.
3. Antenna Placement: The GSM and GPS antennas are built into the tracker. Ensure the tracker is placed where it can receive a GPS signal. If GPS signal is poor at the OBD socket location, use an external OBD extension cable to relocate the tracker. Keep the tracker away from large metal objects and magnetic components.
4. GPS Location Time: GPS acquisition can take 10-200 seconds. SMS delivery may be delayed during weak GSM signal conditions or network congestion.
5. Data Retention: Tracking data on the server is retained for 3-6 months. Older data is periodically deleted.

TROUBLESHOOTING:

1. Tracker Auto Power Off: Verify that the tracker is securely connected to the OBD socket and receiving power.
2. Red LED Solid ON, No Response: Check the SIM card installation, ensure PIN code is disabled, sufficient SIM card balance, and verify mobile network availability in the area. A correctly functioning tracker will show a green LED flashing every 4 seconds.
3. Cannot Upload Location to Website: Confirm that the SIM card has an active internet data plan and that APN, username, and password settings are correctly configured (contact your mobile provider for these details). Ensure the vehicle is moving, as the tracker may not upload data if stationary.
4. No SMS Reply: Ensure the SIM card has caller ID and SMS service enabled. Verify that you are using a center or authorized number to send SMS commands and that the commands and password are entered correctly. Review any error messages received from the tracker.
5. Cannot Login to Platform: Use SMS command to check the tracker ID and try logging in again using the last 7 digits as username and default password. If login still fails, contact your distributor for support.
6. Lost Tracking After Underground Parking: GPS and GSM signals are often lost underground. Upon exiting, allow a few minutes for the GSM and GPS modules to re-establish connection and relocate. Some tracking points may be missed during this transition, which is normal.
7. Occasional Lost Location Points: Intermittent loss of location points is possible during data transmission but should be infrequent.

LA9039 SPECIFICATIONS:

Working Voltage	9-40V DC	Communicate Network	2G GSM / 3G WCDMA / 4G LTE
2/3/4G Module (Customizable)	EC25-AUX (Quectel)	2G GSM Band	B2/ B3/ B5 / B8
3G WCDMA Band	Bl / B2/ B4/ B5/ B8	4G LTE-FDD Band	Bl / B2/ B3/ B4 / B5/ B7/ B8/ B28
2/3/4G & GPS Antenna	Internal & Internal	GNSS Module	GPS
Locate precision	5-10 Meters	GPS Hot Start Time	1 second average
GPS Cold Start Time	36 seconds average	Moving Tracking Current
Stop Standby Online Current		Stop Standby Current
CAN BUS Channel	2 Channels	Backup Battery Capacity	100mAh (Polymer)
Battery Recharging Current		Working Temperature	-20°C to +55°C
Absolute Working Temperature	-40°C to +80°C	Storage Temperature	-40°C to +80°C

WARRANTY:

This product is warranted for one year from the date of purchase, excluding conditions resulting from:

1. Installation, repair, or modifications by non-professionals.
2. Ownership transfer of the tracker.
3. Damage caused by misuse.
4. Consumable parts such as battery, adapter, and wires.

Disclaimer: This device is intended as an aid for vehicle location and monitoring. The manufacturer assumes no liability for damages or losses incurred while using this tracker.

Documents / Resources

	NEXTECH OBD II 4G/GPS Tracking Device [pdf] User GuideOBD II 4G, GPS Tracking Device, NEXTECH
NEXTECH OBD II 4G/GPS Tracking Device [pdf] Instruction ManualOBD II 4G GPS Tracking Device, GPS Tracking Device, Tracking Device, Device

References

www.nextechgps.com