How do I troubleshoot my M-Series device? | Trackunit ┃ Help Center

M-Series troubleshooting

Problem/Symptom	Probable cause	Corrective action required
The device does not check in/ does not appear on the map	The device is not activated	Contact your account administrator to confirm the device is activated.
The device does not check in/ does not appear on the map	The device is not powering on	Ensure the device's power connections/wiring are secure, properly connected, and not damaged. If the device is still unresponsive, refer to the wiring section in the device Installation Guide to check the required connections. Check the in-line fuse on B+ on the machine wiring harness. Replace the fuse, if the in-line fuse is blown. Check to ensure the B+ power connection is always on (Un-switched).
The device does not check in/ does not appear on the map	The device is damaged	Replace the device.
The device does not check in/ does not appear on the map	The antenna's line of sight to GPS satellites is obstructed	Move the asset outside and ensure that the device's antenna has an unobstructed view of the sky.
The in-line fuse always blows	Electrical short wiring harness	Replace the wiring harness.
The in-line fuse always blows	Device shorting out	Replace the device.

The CANbus Communication table outlines solutions to CANbus issues on M-series Devices.

Problem/Symptom	Probable cause	Corrective action required
No CANbus values	CANbus is not communicating	Check the CANbus connections. You may need to reverse the CAN (+) and CAN (-) signal wires on the termination points. For further information on CANbus connections, refer to the device Installation Guide.
No CANbus values	Termination resistance is missing	The Termination resistor may be disconnected or faulty. If equipped, ensure the terminal plug is properly installed. The terminal plug should measure 120 ohms.
No CANbus values	Control panel issue	If CANbus did communicate but no longer does, refer to the machine control panel guide to check the settings.
Incomplete CANbus data	Incorrect device configuration Customer ECU issue	Contact your account administrator.
The engine is running, but the device data indicates the engine is not running.	Engine data not transmitting No CANbus data	Check the CANbus connections. You may need to reverse the CAN (+) and CAN (-) signal wires on the termination points. For further information on CANbus connections, refer to the device installation guide.

All M-series devices have two status LEDs, a GPS and COM (cellular). Please refer to the tables below for the LED behaviours.

COM “Cellular” LED (Orange):

Condition	LED
Modem off	Off
Modem on and searching	Slow flashing
Network available	Fast flashing
Registered but no inbound acknowledgement	Alternates from Solid to Fast flash every second
Registered and received inbound acknowledgement	Solid (not flashing)

GPS LED (Green):

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