Garmin MX20 Installation Manual - page 66
Troubleshooting
MX20 Installation Manual
59
Table 5-1. Troubleshooting Guide Cont’d
Problem Cause
Solution
1. Data port configuration incorrect. 1. Ensure that the data port
configuration is correct and
matches how the unit is wired for
the SL30.
2. SL30 is not powered up.
2. Ensure the SL30 has power
applied.
SL30 information is not
displayed.
3. Wiring connections are incorrect 3. Check wiring.
Unit shows DEMO data flag.
1. Demo mode enabled.
1. Disable demo mode in the install
pages.
Unit posts message indicating
‘Special’ terrain clearance mode
after power-up.
1. Incorrect terrain clearance mode
improperly set.
1. This is normal for special
‘Capstone’ support. General
aviation usage should have the
terrain mode set to ‘Normal’ in
the install pages.
1. Unit is not Traffic capable.
1. Ensure that the model MX20 is
traffic capable.
2. Data port configuration incorrect 2. Ensure that the data port
configuration is correct and
matches how the unit is wired for
the serial interface.
3. Traffic function not enabled.
3. Ensure that the traffic function is
enabled.
4. TCAD unit not powered up; not
functioning properly.
4. Ensure that the TCAD unit has
power applied and is functional.
Unit shows TCAD data flag.
5. Wiring connections are incorrect. 5. Verify serial wiring and pin
connections.
1. Unit is not radar capable.
1. Ensure that the model MX20 is
radar capable.
2. Data port configuration incorrect 2. Ensure that the data port
configuration is correct and the
model radar head is set correctly.
3. Radar function not enabled.
3. Ensure that the radar function is
enabled.
4. Radar unit not powered up; not
functioning properly.
4. Ensure that the radar unit has
power applied and is functional.
Unit shows RDR (Amber) data
flag.
5. Wiring connects are incorrect.
5. Verify 453/708, 429 and discrete
wiring and pin connections.
1. Unit is not GDL 69/69A capable. 1. Ensure that the model MX20 is
GDL 69/69A capable.
2. Data port configuration incorrect. 2. Ensure that the data port
configuration is correct and the
GDL 69/69A is set correctly.
3. GDL 69/69A function not
enabled.
3. Ensure that the GDL 69/69A
function is enabled.
4. GDL 69/69A not powered up; not
functioning properly.
4. Ensure that the GDL 69/69A has
power applied and is functional.
Unit shows XM data flag
5. Wiring connects are incorrect.
5. Verify wiring and pin connections.