Garmin GDL 69/69A Installation Manual - page 49
Troubleshooting
GDL 69/69A Installation Manual
Page 5-1
190-00355-02
Revision E
5 TROUBLESHOOTING
Table 5-1. Troubleshooting Guide
Problem Action
No communication with GDL
69/69A.
• Check power wiring and pin out.
• Verify correct communication port setting on display/control device.
No or low-quality XM signal
• Ensure the XM antenna has an unobstructed view of satellite
constellation.
• Check the antenna cable and connectors.
• Verify correct antenna loss value in the configuration module.
• Verify antenna ground plane is adequate.
No audio output (for GDL 69A)
• Verify installed unit is GDL 69A, and not GDL 69 (with no audio
feature).
• Verify wiring of audio suppression input. Verify wiring is going to
correct active high or active low input sense.
• Check wiring from GDL 69A to audio panel.
• Verify ‘Mute’ is not on.
• Increase volume by pressing Volume Up.
• If there is audio output only on Channel 1, verify that audio XM
service has been activated. Reference 190-00355-04.
Incorrect or no XM subscribed
services displayed
• Verify subscription with XM Satellite Radio.
• GDL 69/69A might not have been properly activated. Reference
190-00355-04.
XM audio entertainment does not
mute when audio suppression
interfaced inputs (stall, gear) are
activated. (GDL 69A only)
• Verify wiring of audio suppression inputs.
• Verify alarm activation state of warning active high and active low.