The JM-VL03 is a GNSS Vehicle Terminal. The device features indicator lights and a SIM card slot.
Top View:
Bottom View:
| Item | Quantity |
|---|---|
| JM-VL03 | 1 |
| Power cable (Length:1m) | 1 |
| Relay | Optional |
| Panic button | Optional |
| Network | 4G & 2G |
| Frequency | JM-VL03E: FDD: B1/B3/B5/B7/B8/B20, TDD: B34/B38/B39/B40/B41, GSM: 900/1800 MHz |
| JM-VL03A: LTE: B1/B3/B7/B8/B28, GSM: 850/900/1800/1900 MHz | |
| JM-VL03M: LTE: B2/B4/B5/B7/B12/B13, GSM: 850/900/1800/1900 MHz | |
| Location accuracy | <10 meters CEP |
| Relay | Optional |
| TTFF (open sky) | Avg. hot start≤1sec, Avg. cold start≤32sec |
| Indication | GPS (Blue), Cellular (Green), Power (Red) |
| Battery | 60mAh, 3.7V Li-Polymer battery (270mAh/3.7V optional) |
| Operating voltage | 9-90VDC |
| Operating temperature | -20°C to +70°C |
| Device weight | 69g |
| Device dimension | 94.3mm*50.4mm*15.0mm |
Prepare a micro SIM card that supports the same network as this device.
SIM Card Type Support: Micro SIM card is supported (indicated by a checkmark ✔). Mini SIM card is not supported (indicated by a cross ✖). Nano SIM card is not supported (indicated by a cross ✖).
Remove the upper cover of the device.
[Diagram showing how to remove the device cover]
Insert SIM card into the slot and toggle the switch to ON.
[Diagram showing SIM card insertion and switch position]
To ensure waterproof effect, make sure the silicon rubber ring is installed in place.
[Diagram showing the silicon rubber ring being placed on the device]
Press the upper case down and make sure all 5 clips are completely in place.
[Diagram showing the upper case being pressed down to secure clips]
| LED Pattern | Status |
|---|---|
| On for 0.3s and off for 0.3s | Low power |
| On for 1s and off for 3s | Fully charged |
| On for 0.1s and off for 3s | Charging (Higher priority than the status of low power) |
| Solid on | Working normally |
| Off | Battery is exhausted/Internal failure |
| LED Pattern | Status |
|---|---|
| On for 0.3s and off for 0.3s | Searching GNSS signal |
| Solid on | Positioned |
| Off | GNSS module is in sleep mode or not working |
| LED Pattern | Status |
|---|---|
| On for 0.3s and off for 0.3s | Network initializing |
| On for 1s and off for 3s | Receiving signal normally |
| On for 0.1s and off for 3s | Network connected |
| Solid on | Calling |
| Off | No signal received/No SIM card detected |
| LED Pattern (Red, Blue, Green) | Status |
|---|---|
| Red, Blue and Green on for 3s | Connected/disconnected power supply |
| Interface | Color | Description |
|---|---|---|
| V+ | Red | Power + (9-90V) |
| V- | Black | Power - Ground pin |
| ACC | Orange | Vehicle ignition detection |
| Relay | Yellow | Cut-off vehicle fuel supply |
| SOS+ | Purple | SOS Trigger Pin |
| SOS- | White | SOS Ground Pin |
| Interface | Color | Description |
|---|---|---|
| V+ | Red | Power + (9-90V) |
| V- | Black | Power - Ground Pin |
| Tx/RS485 A | Blue | TTL Tx or RS485 A |
| Rx/RS485 B | Green | TTL Rx or RS485 B |
| SOS+ | Purple | SOS Trigger Pin |
| SOS- | White | SOS Ground Pin |
Note: Regardless of whether the ignition key is switched to ON or OFF, the current battery voltage can be shown in the multimeter.
[Diagram illustrating the wiring connections: A 9-90VDC Battery is connected via Red (Positive) and Black (Negative) wires, protected by a 2A Fuse on the positive line. An Orange wire is for ACC ON (connected to a key switch). A Yellow wire is for fuel cut-off. An optional Panic button is also shown.]
Please install the device under the guidance of professional personnel.
Note:
| Command | Description |
|---|---|
| VERSION# | Query the firmware version. |
| STATUS# | Query the status. |
| PARAM# | Query parameters (IMEI, SOS numbers, center number, and time zone). |
| WHERE# | Query the current location. |
| URL# | Query the location link. |
Example URL responses:
| Command | Description |
|---|---|
| GPRSSET# | Query network parameters (GPRS status, APN, server address, URL, etc.). Example: GPRS, ON; Currently use APN:CMnet,,; APN Auto set:OFF; SERVER, 1, test.topstargps.com, 11139;URL, http://maps.google.com/maps?q= |
| APN# | Set APN parameters. Format: APN, apnname# OR APN, apnname, user,pwd#. Close automatic APN and set by yourself. Check the current APN parameters. |
| SERVER# | Set the parameters of the monitoring server. Format: SERVER, mode,domainName/IP, port, protocol#. Example: SERVER,1,www.ydpat.com, 8011,0#; SERVER,0,211.154.135.113, 8011,0#. Mode: 1=set with domain name, 0=set with IP address. Protocol: 0=connect server with TCP protocol, 1=connect server with UDP protocol. Check the current server parameters. |
| Command | Description |
|---|---|
| SOS# | Set SOS numbers. Format: SOS, A, phone number 1, phone number 2, phone number 3# (Add SOS phone number). SOS, D, sequence number 1, sequence number 2, sequence number 3# (Delete phone number by sequence number). SOS,D, phone number# (Delete matching SOS phone number). SOS# (Check the SOS phone number). |
| TIMER# | Set the time interval for the GNSS module to send data. Format: TIMER,T1,T2#. T1=5~18000 or 0, upload interval when ACC ON (unit: seconds; 0 means no upload; default is 10). T2=5~18000 or 0, upload interval when ACC OFF (unit: seconds; 0 means no upload; default is 10). TIMER# (Check the current parameters of T1 and T2). |
| RELAY# | Control the power and fuel. Format: RELAY,A# (A=0/1; 0 means connection, 1 means cut off; default: 0). RELAY# (Check the status of the control). |
| Command | Description |
|---|---|
| ADT# | Set parameters to upload voltage values of the external battery. Format: ADT,A,T#. A=ON/OFF, On/Off ADC data upload, default: Off. B=5~3600, Default: 600s; Upload time interval, unit: seconds. ADT,OFF# (Turn off analog data upload). ADT# (Query the ADT port parameters). |
| RESET# | The device restarts 20 seconds later after receiving the command. RESET# (The device would reboot in 20S after receiving the command). |
| SPEEDCHECK# | Set and query the sudden speed change alert. Format: SPEEDCHECK,ON,M,T,A,D#. M=0/1, alarm reporting method (0: only GPRS, 1: GPRS+SMS, default: 0). T=1~30, detection duration (unit: seconds, default: 4). A=10~300(km/h), threshold of Harsh acceleration speed difference, default 30. D=10~300(km/h), difference threshold for sudden brake deceleration speed, default 50. SPEEDCHECK,OFF# (Turn off the SPEEDCHECK alarm). SPEEDCHECK# (Query the SPEEDCHECK port parameters). |
| Command | Description |
|---|---|
| SWERVE# | Set and query the sharp cornering alert. Format: SWERVE,ON,M,A,S,T#. M=0/1, alarm reporting method (0: only GPRS, 1: GPRS+SMS, default: 0). A=10~180(degrees), trigger alarm Angle threshold, default 30. S=10~200(km/h), trigger alarm Speed threshold, default 60. T=1~30 detection duration, unit: seconds, default 3. SWERVE, OFF# (Turn off the SWERVE alarm). SWERVE# (Query the SWERVE port parameters). |
| PULLALM# | Set tamper alert. Format: PULLALM, ON,M,N,T#. M=0/1, alarm reporting method (0: only GPRS, 1: GPRS+SMS, default: 0). N=1~40, Threshold of mean change, unit: 0.1g (g: acceleration of gravity), default 30. T=2~10 The time interval between power cut-off event (triggered before rollover) and rollover event, unit: seconds, default 5. PULLALM, OFF# (Turn off the PULLALM alarm). PULLALM# (Query the PULLALM port parameters). |
| Type | Use |
|---|---|
| Unable to connect to tracking platform | Check the APN and IP settings. Check whether the data service of SIM card is enabled. Check the balance of SIM card. |
| Tracker shows offline | Check whether external power is still connected. Check if the vehicle entered network blind area. Check the balance of SIM card. |
| Unable to locate | Make sure the top side is facing upward without metallic things shielded. Make sure it's not in an area with no satellite coverage. |
| Location drift | In areas with poor GNSS signal (e.g., tall buildings or basements), drifting may happen. Check whether vibration happens around to trigger the accelerator. |
| No command reply | Make sure the command format is correct. The vehicle may be in a network blind area. Make sure the SIM card is well inserted and has SMS service. |
| Date | Service by |
|---|---|
| Product Model | |
| IMEI Number | |
| Failure Description | |
| Comments |