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Fault Type
Fault Name
Clock Generator I2C
Main Temp Sensor
I2C
CRF Temp Sensor I2C
ADC (Voltage Monitor)
ADC Monitor 0
ADC Monitor 1
ADC Monitor 2
Clock Generator
Register
Digital HW
DDR
Flash-to-RAM Code
Sensor Code CRC
Sensor Status
Sensor Watchdog
GRA 5500 Installation Manual
Page A-4
Table A-3 GRA 5500 Fault Descriptions
Description
Cause
Clock Generator is
read to determine
correct frequency
output.
Internal
communication error
Temperature Sensor
is read to determine
correct operation.
ADC did not respond
to sampling
Internal
conversion command
communication error
within 20us
ADC used to monitor
internal unit voltages
ADC failure
fails self-test
ADC used to monitor
internal unit voltages
ADC failure
fails self-test
ADC used to monitor
internal unit voltages
ADC failure
fails self-test
Clock generator
Clock generator failure
programming failure
Memory integrity test
Memory failure
Code corrupted in
flash memory
Failed to validate
code sections in
Code corrupted during
memory
transfer from flash to
RAM
Code corrupted during
transfer from flash to
Sensor processor
main processor
code failed validity
Code corrupted during
check
transfer from main to
sensor processor
Sensor CPU fails to
Sensor processor
respond to Main CPU
failure
or packet information
Internal
is not correct from
communication error
sensor
Sensor processor
Sensor processor
failure
reset signal triggered
Internal
by sensor watchdog
communication error
(continued on next page)
Resolution
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
Cycle power to unit. If fault persists, return unit to
Garmin for service.
190-01277-00
Revision A
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