Filter Life Monitor - PREVOST X3-45 COACH 2018 Operator's Manual

4 APPENDIX C – Allison Transmission's Other Features
type mode and perform the following sequences
to select the proper transmission type:
N-R-N to select TES295
N-D-N to select TES389
The selector exits 30 seconds after entering
transmission fluid type mode or the ignition may
be turned off to exit earlier. Only one
transmission fluid type selection may be made
after entering transmission fluid type mode. All
other attempt will be ignored. Transmission fluid
type mode needs to be entered again if the
wrong type of fluid is selected.
CAUTION
Verify prognostics fluid type setting matches
transmission fluid type. Oil Life Monitor
notifications will be
mismatched. This could result in transmission
damage from running a TES389 fluid too long
or cause shortened TES295 fluid changes to
occur.
CAUTION
Required calendar-based oil & filter change
intervals (based on month) still apply because
Oil Life Monitor function cannot measure time
while ignition power is OFF.
If the Oil Life Monitor function has not indicated
the need for a fluid change before 60 months
have passed when using TES295 fluid type or
before 24 months have passed when using
TES389 fluid type, it will be necessary to
change the fluid and filters per calendar
requirements and reset the system.

FILTER LIFE MONITOR

This feature provides an alert when the
transmission's fluid filters need to be replaced. It
helps extend filter change intervals to reduce
routine maintenance downtime while providing
maximum protection for the transmission.
The filter life indicator pressure switch signals
the transmission control module when fluid
exiting the main filter
predetermined pressure. Both the main and lube
filters must be
TRANSMISSION SERVICE indicator
the main filter should be changed.
inaccurate when
drops below a
changed when the
shows
PA1627 X3-45 Operator's Manual
Filter Change Notification
The TRANSMISSION SERVICE indicator
flash for 2 minutes after the first selection of "D"
(drive) range. Once the Filter Monitor mode has
been accessed via the shift selector, the "OIL
FILTER OK" or "REPLACE FILTERS" message
is displayed in the selector display window. An
acceptable filter life status is displayed as "OIL
FILTER OK". An unacceptable filter life status is
displayed as "REPLACE FILTERS".
Once the programmed threshold for maximum
filter pressure drop has been observed and
verified, the diagnostic
Transmission Filter Maintenance Alert will be
recorded to indicate that the filter has reached
the end of its designed life. At the next
initialization of the TCM, the TRANSMISSION
SERVICE indicator will flash for 2 minutes after
the first selection of
Thereafter, the indicator will illuminate and flash
upon each TCM initialization, continuing to flash
for 2 minutes after the first selection of a drive
range each time, until service is performed and
the indicator is reset.
Failure to perform maintenance and reset the
monitor after a calibration-defined number of
warnings will result in the illumination of the
CHECK light with associated message in the
DID and diagnostic code P088B will be recorded
to indicate a highly deteriorated filter.
Read and Reset Filter Life Monitor from
Selector
To enter the filter
simultaneously the
(Downshift) arrows three times. An acceptable
filter life status is displayed as "OIL FILTER OK".
An unacceptable filter life status is displayed as
"REPLACE FILTERS".
The feature will reset automatically when the
main fluid filter has been changed and the
pressure drop across the filter no longer
exceeds the threshold value. A manual reset
can be performed by depressing and holding the
MODE button for ten (10) seconds while the
Filter Life Monitor function is displayed. It may
also be reset by selecting N-R-N-R-N-D-N on
the shift selector, pausing briefly (less than 3
seconds) between each selector movement,
with the ignition on and the engine not running.
The TRANSMISSION SERVICE indicator
illuminates briefly following
acknowledge the reset was successful.
will
code P088A
"D" (drive) range.
life monitor, press
(Upshift) and
a reset to