[CA] [CA11] Axiom Pro not recognizing external GPS

[Chuck - Raymarine - Moderator]

Rick,

Verify that the backbone features two (and only two) termination plugs. Test the resistance across each termination plug's CAN_H and CAN_L pins ... 120 Ohms should be measured. Verify that the backbone has been powered from a single spur socket which is located at the approximate midpoint of the backbone's LEN load and has been powered via a SeaTalkng Power Cable. If an ACU200, ACU300, or ACU400 has been installed, please verify that the ACU's SeaTalkng power switch has been switched OFF (the second power insertion may result in a ground loop). Inspect the Backbone Cables used to connect the MFD's spur socket to the rest of the backbone for damage, splices, or modifications ... replace if damage is found. Inspect the Spur Cable used to connect the MFD's spur socket to the backbone for damage, splices, or modifications ... replace if damage, splices, or modifications found. Disconnect and reconnect the spur connections to the Data Master MFD's NMEA 2000 connector and the spur cable's connection to the backbone, being certain to ensure that all locking rings are moved to the locked position. Verify whether the MFD's networked devices list (HOME->SETTINGS->NETWORK->) includes all other devices within the network. If the system's other SeaTalkng / NMEA 2000 devices are not listed, then it may indicate a failure within the MFD's NMEA 2000 communications circuitry if the above have all been satisfied. If only the Maretron GPS is found to be missing from this list, then the MFD's internal GPS should be configured OFF and the LightHouse 3 NMEA 2000 recording feature (HOME->SETTINGS->NETWORK->DIAGNOSTICS->NMEA DEVICES & MESSAGES->NMEA MESSAGES; RAW DATA->ENABLE; START RECORDING) should be used to record 15-20 seconds of data. The resulting NMEA 2000 log should then be attached to this thread for further analysis.