MegaSquirt DBWX2, Краткое руководство пользователя, Страница: 15 / 24

AVR Fault codes
The AVR cpu has the same fault diagnosis as the
main ARM cpu. The reason behind the addon of a
secondary CPU is redundancy. If the main cpu failed
such that it would command the throttle(s) open, the
secondary cpu will still be able to save the situation
by disabling the DBW(s) completely.
Clear codes button: Self explanatory.
Disable AVR CPU button: This disables the fault
checking of the secondary CPU. This is mandatory
for calibration purposes. The disabled status is
shown by the “protection enabled / disabled”
indicator.
Update AVR data button: This button makes the
main CPU to resend the calibration data to the AVR
CPU. If a fault condition is not cleared by clear
button, try to update the avr data to see if the fault
condition was caused by calibration data mismatch.
The sensor fault codes are the same as in the ARM
fault code menus.
Compared to the ARM codes there are a few extras.
The AVR CPU monitors the H-bridge statuses and
these can be seen from this menu. If a H-Bridge
error status is flagged and nothing else it means that
the H-Bridge output has a short or the bridge driver
has overheated. This error may also be displayed
when the h-bridge is disabled from other error
sources.
DBW opening in limits: If the DBW is opened more that what has been defined in the “DBW
Maximum opening” tables triggers this error.
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