Garmin G3X Touch - GSU 25;25 B (Ahrs;Air Data Sensor Unit); J251

190-01115-01 G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC Page 25-55
25.13 GSU 25/25B (AHRS/Air Data Sensor Unit)
25.13.1 J251
Figure 25-24 J251 on GSU 25, as viewed looking at connector on unit
Pin Pin Name I/O
1 CAN H I/O
2 CAN L --
3 RESERVED --
4 RS-232 RX 1 In
5 RS-232 TX 1 Out
6 GROUND --
7 AIRCRAFT POWER 1 In
8 AIRCRAFT POWER 2 In
9 GROUND --