10.2 | GNSS & Position Issues

Issue	Possible Cause	Recommended Action
No GNSS position detected	Receiver harness disconnected	Verify GNSS receiver harness connections
No GNSS position detected	Receiver not powered	Verify GNSS receiver/display powers on correctly
No GNSS data after startup	Receiver still initialising	Allow receiver sufficient time to initialise and acquire satellite lock
Receiver powers on but no data detected	Incorrect serial/CANreceiver output connection or configuration	VerifyFor NMEA 2000 receivers, verify connection to the correct receiverCANBUS port operating at 250 kbps. For NMEA 0183 receivers, verify the correct serial output port isand baud rate are configured and connected
Receiver powers on but no data detected	Incorrect RS232 baud rate configuration	For NMEA 0183 receivers, verify the configured serial baud rate matches the Level COMMAND receiver configuration
Receiver powers on but no data detected	Incorrect CANBUS connection or baud rate	For CANBUS/NMEA 2000 receivers, verify the receiver is connected to the correct CANBUS network operating at 250 kbps

Receiver powers on but no data detected Incorrect serial/CAN output port selected Verify the correct receiver output port is enabled and connected Receiver powers on but no data detected NMEA output messages not enabled Verify required NMEA output messages are enabled within the receiver/display configuration Position updates slowly Low output rate configured Configure receiver output rate to minimum 5 Hz; 10 Hz recommended No RTK corrections Incorrect base station selected Verify the implement receiver is connected to the intended base station or correction source No RTK corrections Base station not transmitting corrections Verify base station operation and correction output No RTK corrections Incorrect base station configuration Verify base station radio/modem and correction output configuration No RTK corrections Incorrect implement receiver configuration Verify correction source, radio/modem and RTK settings within the implement receiver RTK intermittently lost Poor correction radio signal Inspect correction antenna placement and cable condition RTK intermittently lost Excessive distance from base station Reduce distance to base station or verify correction coverage RTK intermittently lost GNSS quality thresholds configured too aggressively Verify Level COMMAND GNSS requirement settings are suitable for current operating conditions Poor accuracy or drifting Low GNSS correction quality Verify RTK/DGNSS correction status Poor accuracy or drifting Multipath or obstructed sky view Move machine to open sky area clear of obstructions GNSS accuracy degraded unexpectedly Receiver operating in Float/DGNSS mode Verify RTK Fix status before operation Position intermittently lost Damaged harness or loose connector Inspect GNSS harnessing and connectors Position quality degraded Receiver firmware outdated Verify GNSS receiver firmware is up to date Position appears offset Incorrect base station coordinates Verify configured base station coordinates Position appears offset Connected to incorrect base station Verify the implement receiver is connected to the correct base station Position appears offset Incorrect receiver offsets configured Verify receiver height, fore/aft and lateral offsets within Level COMMAND Cross-slope or terrain response incorrect Incorrect IMU or receiver assignment Verify GNSS and IMU configuration within Level COMMAND Terrain compensation inaccurate TCM/IMU calibration not completed Perform TCM/IMU calibration according to manufacturer instructions Terrain compensation inaccurate Incorrect machine orientation during calibration Perform calibration on level ground away from vibration Terrain compensation unstable IMU mounted on flexible surface Mount IMU to a rigid surface isolated from excessive vibration