Transmission Health Monitor - PREVOST X3-45 COACH 2018 Operator's Manual

APPENDIX C – Allison Transmission's Other Features 5

TRANSMISSION HEALTH MONITOR

This prognostic feature determines clutch life
status of the transmission's clutches and alerts
you when clutch maintenance is required. The
clutch life status is determined by monitoring
changes and the calculated running clearance of
the transmission clutches.
Clutch Maintenance Notification
The transmission health monitor feature
determines when clutch maintenance is needed.
If any of the clutches (except lockup) reaches a
remaining life of approximately 10% or if any of
the clutch running clearances exceeds a
maximum value, then the TRANSMISSION
SERVICE indicator is steadily illuminated from
just after ignition on until ignition is turned off.
Thereafter, the indicator will be lit upon each
initialization of the TCM, and will remain on
steady during all vehicle operation until service
is performed and the indicator is reset. If the
transmission health monitor mode has been
accessed via the shift selector, a "TRANS
HEALTH OK" or "TRANS HEALTH LO" is
displayed. An acceptable clutch life status is
displayed as "TRANS HEALTH OK". An
unacceptable clutch life status is displayed as
"TRANS HEALTH LO".
Read and Reset Transmission Health Monitor
from Selector
To enter the transmission health monitor, press
simultaneously the (Upshift) and
(Downshift) arrows four times. An acceptable
clutch life status is displayed as "TRANS
HEALTH OK". An unacceptable filter life status
is displayed as "TRANS HEALTH LO".
The feature will reset automatically upon
elimination of the clutch clearance condition
which initiated it. The indicator can also be
manually reset using the Allison DOC™ for PC
diagnostics program if necessary.
PA1627 X3-45 Operator's Manual