Telematics Information

Telematics General Description

The telematics system allows the unit owner real-time remote genset monitoring and management access. This system monitors and communicates the following information to the unit owner through the Thermo King Telematics System:

  • Asset Name

  • Unit Location (GPS Tracking)

  • Genset Status (ON/OFF)

  • Battery Voltage

  • Fuel Level

  • Engine RPM

  • Engine Load %

  • Engine Temperature

  • Generator Voltage

  • Generator Hz

  • Total Hours

Important Typically technicians and repair facilities will not have access to the information the telematics system is transmitting. This special access is controlled and managed by the genset unit owner.

Telematics Component Locations

SGUM and SGCO 5000 (Covers Removed)

1. SGUM 5000 Control Module Location 4. SGCO 5000 Control Module Location (attached to cover)
2. SGUM 5000 Antenna Location 5. SGCO 5000 Antenna Location (attached to cover)
3. SGUM 5000 Fuel Level Sensor Location 6. SGCO 5000 Fuel Level Sensor Location

Telematics Module

1. Main Control Harness Connection / Unit Data 3. GPS Antenna Connector (from antenna)
2. Diagnostic LED (can flash red, green, or yellow in color) 4. LTE / Cell Connection (from antenna)

Telematics Module Cycle Identification (LED Flash)

Important When the unit is ON the telematics system will communicate with the unit owner at least every 15 minutes (see the communication schedules below). When the units is turned OFF, the telematics system sends only GPS, battery voltage, and fuel level information once a day.

Important Typically, service technicians will not know there is an issue with the telematics system until the unit owner reports unit problems. If telematics issues are reported by the unit owner, the technician can perform some diagnostic checks and repair on the unit and/or telematics system.

The telematics module features an LED flashing sequence that can be used to check the operation mode. The LED is located on the front of the device in between the antenna connectors and the main connector.


The telematics module goes through three communication cycles (the unit can be ON or OFF):

  • CELL COMMUNICATION CYCLE - The telematics module communicates to the server to transmit location and reefer data once every 15 minutes.

  • GPS COMMUNICATION CYCLE - The telematics module communicates to GPS satellites to obtain location data once every 10 minutes.

  • GENSET COMMUNICATION CYCLE - The telematics module communicates to the controller to obtain data every 30 seconds.


Communication cycles can be identified by a unique flashing sequence of the LED on the front of the telematics module. This flashing sequence is repeated three times for each communication cycle:


CELL COMMUNICATION CYCLE: A call is made every 15 minutes which can be identified by:

  • 3 short orange flashes - The telematics module is busy making a call

  • 3 short green flashes - The telematics module has successfully made a call

  • 3 short red flashes - The telematics module is unable to call in

Important The ability of the device to call in depends on the availability and strength of the GSM / CELL signal. A missing or bad signal can result in 3 red flashes. This does not mean that there is a problem with the telematics module. Allow the module to go through several call cycles before continuing diagnostics or module replacement.
Important The GPS / CELL antenna may not be able to receive signal indoors (shop bay). The function must be verified outdoors where good signal can be reached.
Note Verify CELL signal by viewing your mobile phone signal level. This check will give an estimate on CELL signal strength level, but can be inaccurate due to the many telecom providers.

GPS COMMUNICATION CYCLE: Location records are obtained every 10 minutes which can be identified by:

  • 2 short orange flashes - The telematics module is obtaining GPS data

  • 2 short green flashes - The telematics module has successfully obtained GPS data

  • 2 short red flashes - The telematics module is unable to obtain GPS data

Important The ability of the device to obtain GPS data depends on the availability and strength of the GPS signal. A missing or bad signal can result in 2 red flashes. This does not mean that there is a problem with the telematics module. Allow the module to go through several GPS cycles before continuing diagnostics or module replacement.
Important The GPS / CELL antenna may not be able to receive signal indoors (shop bay). The function must be verified outdoors where good signal can be reached.
Note Verify CELL signal by viewing your mobile phone signal level. This check will give an estimate on CELL signal strength level, but can be inaccurate due to the many telecom providers.


GENSET COMMUNICATION CYCLE: Genset data is obtained every 30 seconds which can be identified by:

  • 1 short orange flash - The telematics module is obtaining data from the unit controller

  • 1 short green flash - The telematics module has successfully obtained data from the unit controller

  • 1 short red flash - The telematics module is unable to obtain data from the unit controller

Important Sometimes the device cannot obtain genset data from the unit controller due to various reasons. This will result in 1 red flash. This does not mean that there is a problem with the telematics module. Allow the telematics module to go through several cycles before continuing diagnostics or module replacement.

Telematics Diagnostic Information

Important The telematics system (when operating normally) will communicate with the unit owner non-stop - even when the SG unit is turned OFF. Typically, service technicians will not know there is an issue with the telematics system until the unit owner reports problems. If telematics issues are reported by the unit owner, the technician can perform some diagnostic checks and repair on the unit and/or telematics system.

Important Each unit is uniquely paired to a telematics module on the assembly line:

  • Do not swap telematics modules between units.

  • If the telematics module is replaced, it must be uniquely paired to the unit using an app and a compatible device.


If the telematics system is not working correctly, perform the following steps before replacing the telematics module:

  1. Put the unit into ECU SERVICE MODE found in the COMMANDS MENU:

    • Place the SG unit main On/Off switch in the “ON” position.

    • Press the ENTER key or the ESCAPE key to enter the Main Menu, if necessary.

    • Press the UP or DOWN key to scroll up or down through the Main Menu to the Commands Menu.

    • Press the ENTER key to enter the Commands Menu.

    • The PTI submenu will be displayed.

    • Press the UP or DOWN key to scroll up or down through the Commands Menu and select the ECU SERVICE MODE.

    Putting the SG unit into ECU SERVICE MODE allows the telematics system to operate normally, and will prevent the engine from starting.

  2. Verify the SG unit is supplying battery voltage to the telematics system on connections J12 (switched B+ with unit ON/OFF switch) and J13 (B+) on the controller. If battery voltage is not present, diagnose the issue with the SG unit.

  3. Verify all other telematics connections are correct and tight at the controller:

    1. J13 Connection - Red Power Supply Wire Connection for Telematics System with Fuse (B+)
    2. J12 Connection - White Power Supply Wire Connection for Telematics System (B+ switched by unit On / Off switch)
    3. J3 Connection - Telematics Connector Location

  4. Check the telematics system 2A fuse located on the telematics J13 connection in an individual fuse holder near the control module and replace if necessary:

  5. Turn the SG unit OFF. Disconnect the telematics module main connector and check main harness wiring continuity from the control box to the telematics module. Ensure the terminals inside the main connector are tight and the connector is engaged firmly to the module. Check the module pins and verify that are not bent out of place.

  6. Put the SG unit into ECU SERVICE MODE found in the COMMANDS MENU:

    • Place the SG unit main On/Off switch in the “ON” position.

    • Press the ENTER key or the ESCAPE key to enter the Main Menu, if necessary.

    • Press the UP or DOWN key to scroll up or down through the Main Menu to the Commands Menu.

    • Press the ENTER key to enter the Commands Menu.

    • The PTI submenu will be displayed.

    • Press the UP or DOWN key to scroll up or down through the Commands Menu and select the ECU SERVICE MODE.

    Putting the SG unit into ECU SERVICE MODE allows the telematics system to operate normally, and will prevent the engine from starting.

  7. With the main connector disconnected, verify battery voltage (B+) is present on pin 2 and 10. Verify ground (B-) is present on pin 1. Replace the telematics harness if continuity or power and ground supply are not present at the telematics module.

    Main Connector Pin Information
    Pin 1 Black Wire - B- Ground Pin 8 Not Used
    Pin 2 Red Wire - B+ Voltage Pin 9 Not Used
    Pin 3 Not Used Pin 10 White Wire - B+ Voltage (switched by unit On / Off switch)
    Pin 4 Not Used Pin 11 Not Used
    Pin 5 Not Used Pin 12 Not Used
    Pin 6 Green Wire - Unit Information Signal Pin 13 Red Wire - Fuel Sender Signal
    Pin 7 Brown Wire - Unit Information Signal Pin 14 White Wire - Fuel Sender Signal

  8. Turn the SG unit OFF and reconnect all telematics connections.

  9. Put the SG unit into ECU SERVICE MODE found in the COMMANDS MENU:

    • Place the SG main On/Off switch in the “ON” position.

    • Press the ENTER key or the ESCAPE key to enter the Main Menu, if necessary.

    • Press the UP or DOWN key to scroll up or down through the Main Menu to the Commands Menu.

    • Press the ENTER key to enter the Commands Menu.

    • The PTI submenu will be displayed.

    • Press the UP or DOWN key to scroll up or down through the Commands Menu and select the ECU SERVICE MODE.

    Putting the SG unit into ECU SERVICE MODE allows the telematics system to operate normally, and will prevent the engine from starting.

  10. Observe the telematics module LED flash sequence:

    • If the LED is NOT flashing a sequence and the connections, harness, power and ground supply are all verified good, replace the telematics module.

    • If the LED is flashing RED in any of the three sequences (CELL, GPS, GENSET), allow the system to go through a few communications cycles. Ensure the unit is outside and has access to CELL and GPS signal.

      Note Verify CELL signal by viewing your mobile phone signal level. This check will give an estimate on CELL signal strength level, but can be inaccurate due to the many telecom providers.

    • If LED RED flashes continue for the GPS and CELL, verify the antenna pod and harness are not damaged. Verify the antenna connections at the telematics module are tight. Replace the antenna if necessary.

    • If LED RED flashes continue for the GENSET cycle and all connections and harness have been verified good, the telematics module may need replacement.

      Note The SG controller will show a communication error on the screen of the microprocessor is not communicating. In that case, the microprocessor must be replaced. If the SG controller is working normally, but GENSET LED RED flashes persist, the issue is with the telematics module.

  11. Exit ECU SERVICE MODE when service procedures are complete, turn the SG unit main switch off.

Telematics Fuel Level Sensor (optional)

The fuel level sensor is a captive type sensor that transmits a signal to the telematics module. If the unit owner reports fuel level information faults, first perform these electrical checks on the system:

  1. Verify the SG unit is supplying battery voltage and ground to the telematics system and the fuel level sensor. If battery voltage and ground are not present, diagnose the issue with the SG unit or harness.

  2. Check the telematics 2A fuse.

  3. Verify the sensor is receiving battery power (B+) on pin 1 and has a good ground (B-) on pin 2 at the connector.

  4. Verify the pins are tight in the harness connectors.

  5. Verify the harness continuity between the sensor, unit controller, and the telematics module (see the wiring diagram in the back of this manual).

    After the electrical side of the fuel level sensor is verified as working properly, there could be debris and sludge causing issues that need to be inspected.

    1. Cut the fuel level sensor anti-tamper device to allow sensor removal.

    2. Cut the bandwraps securing the sensor harness. Unplug the sensor from the unit wiring.

    3. Turn the sensor 30 degrees counter clock wise to disengage the retaining lugs. Remove the sensor by lifting it upward out of the tank.

    4. Inspect the sensor and fuel tank for sludge and debris that can block the pipe and cause incorrect fuel level readings. Clean the sensor and fuel tank if needed.

      1. Fuel Sensor Pipe 3. Clean Diesel Fuel
      2. Fuel Sensor Pipe Spring 4. Possible Debris / Sludge

    5. Inspect O-ring and replace if necessary.

    6. Reinstall the sensor after cleaning by rotating it 30 degrees clockwise until the anti-tamper lock features align.

    7. Connect sensor and verify (with the unit owner) that the telematics fuel level system is operating correctly.

    8. Install anti-tamper device, secure the sensor harness with bandwraps.

    If the electrical components are verified good, the sensor and tank are free of sludge / debris, and fuel level issues are still reported, replace the fuel level sensor and verify operation with the unit owner.

    Telematics Antenna

    The telematics antenna transmits GPS and CELL signal to the telematics module. If the module cannot connect to GPS or CELL according to the flash codes, or if the unit owner reports connection or data issues:

    • Verify the SG unit is supplying battery voltage and ground to the telematics system. If battery voltage and ground are not present, diagnose the issue with the SG unit or harness.

    • Check the telematics 2A fuse.

    • View the LED flash sequence.

    • Check the connections at the telematics module.

    • Verify the pins are tight in the harness connectors.

    • Verify the antenna harness is not damaged.

    If problems are not found with the fuse, wire harness, or connections, replace the antenna. If communication or connectivity issues persist, replace the telematics module.

    Important The GPS / CELL antenna may not be able to receive signal indoors (shop bay). The function must be verified outdoors where good signal can be reached. See the flash code descriptions in this chapter.
    Note Verify CELL signal by viewing your mobile phone signal level. This check will give an estimate on CELL signal strength level, but can be inaccurate due to the many telecom providers.

    Telematics Simplified Circuit View

    1. Controller (inside control box) 4. Antenna (GPS and CELL)
    2. Fuel Level Sensor 5. 14 Pin Main Harness Connector (Pin view from the BACK of connector)
    3. Telematics Module    

    Pairing Telematics Module to SG Unit

    Important Each SG unit is uniquely paired to a telematics module on the assembly line:

    • Do not swap telematics modules between SG units.

    • If the telematics module is replaced, it must be uniquely paired to the SG unit using an app and a compatible device.

    Before a new telematics module will activate, it must be paired with the SG unit.

    1. Install the following FREE app on a smart phone or other compatible device: GT Install Globe Tracker ApS:

    2. Open the app. Create an account (new users) or sign in (existing users):

      • First time users will need to create an account. Enter username, password, email address and tap the SIGNUP button.

      • DO NOT enter TOTP Code if shown, this is not used.

    3. Select New Installation.

    4. Tap Company and choose the customer / unit owner from the list. If the unit owners company is not listed, contact: support@globetracker.com.

    5. Tap Continue.

    6. Tap Asset Type and choose Genset.

    7. Tap Asset ID and enter the customers Genset number. Optional: You can also add a picture of the Genset and add it into the telematics system by selecting ADD PICTURE.

    8. Tap Continue.

    9. Tap Manufacturer and choose the correct SG genset type: TK: SG clip-on or TK: SG under-mount.

    10. Tap Container Size and select Container Size Not Applicable.

    11. Scroll down and tap Fuel Probe and select GT Probe if the unit is equipped with the optional fuel level sensor.

    12. Scroll down and tap Fuel Tank Profile and select Thermo King SG (Clip-On) or SG (undermount).

    13. DO NOT enter certification, or notes. Leave these blank.

    14. Tap Continue.

    15. Scan the QR-code on the telematics module by pressing the barcode icon OR manually enter the telematics module serial number printed on the module nameplate.

    16. Tap ADD PICTURE and take picture of the QR code and serial number.

    17. Tap Continue.

      Important This installation can be done remotely once all information is available.

    18. DO NOT choose any optional sensor. Leave this blank.

    19. Tap Summary.

    20. Verify all information is correct, then tap Submit.

    21. Leave the app running.

    22. Install the new telematics module. Verify all electrical connections are secure, check the telematics fuse, and wire harnesses.

    23. Go back to the home screen and tap List of Installations.

    24. Select the unit just entered and press REFRESH. This retrieves data from the telematics unit.

    25. Start the SG unit and let it run until all four indicators have turned green in the app.

    26. Verify the flash codes on the module indicate normal operation.

    27. Pairing is now complete.