Control System Prognostics; Normal Prognostics Indication At Engine Start; Oil Life Monitor - PREVOST H3-45 2023 Operator's Manual

CODE
SENSOR FAILED Sensor failure

CONTROL SYSTEM PROGNOSTICS

The transmission control system includes the
provision for the user to monitor various
transmission operating
Transmission operating parameters monitored by
the prognostics feature are:
Oil Life Monitor (OM)
l
Filter Life Monitor (FM)
l
Transmission Health Monitor (TM)
l
NOTE
The prognostics package requires the use of
TranSynd™ or an Allison approved TES295,
TES668 or TES389 licensed fluid in the
transmission and Allison High Capacity
filters.
If any other fluids or filters are used, Prognostic
mode must be disabled.
Prognostic information will not be accurate with
any other fluids or filters and could result in
missed maintenance activities resulting in
transmission damage.
Refer to TES295,
Approved Fluids list,
Service/Fluids heading on the home page of
the Allison Transmission web site.
www.allisontransmission.com
When a specified threshold is detected for any of
the serviceable conditions, the TRANSMISSION
SERVICE indicator is illuminated to alert the
operator. Failure to attend to the service condition
and reset the TRANSMISSION
indicator within a defined operating period will
result in illumination of the CHECK light with
associated message in the DID, indicating the
increased probability that the service condition
will develop into a more serious condition.
To access the Prognostic Mode functions,
simultaneously press the
CAUSE OF FAULT
CODE
parameters.
TES668 or TES389
found under the
SERVICE
(Upshift) and
PA-1652 Operator's Manual H3-45 Coach
Allison Transmission Other Features C-3
(Downshift) arrow buttons repeatedly. See the
REFERENCE TABLE ( )in this section.
NORMAL PROGNOSTICS INDICATION AT
ENGINE START
A system bulb check illuminates the
l
TRANSMISSION
approximately 0.5 seconds.
If Prognostics features are enabled, the
l
TRANSMISSION
illuminates again for 3 seconds after the bulb
check. If Prognostics features are disabled,
the TRANSMISSION SERVICE indicator
does not illuminate again after the bulb
check.

OIL LIFE MONITOR

The display message denotes the calculated
remaining life of the transmission fluid. This value
is based on the established life for the required
baseline fluid, and then is continuously adjusted
for cumulative effects
parameters as operating time, retarder operation,
output shaft revolutions and shift frequency.
Display
The display is a two- digit number, denoting
percentage of the fluid life which remains. New
fluid is displayed as 99%.
The TRANSMISSION SERVICE indicator
be illuminated, denoting a required change of
transmission fluid, when the remaining fluid life
reaches approximately 1 %. The indicator will be
lit steadily upon each initialization of the TCM,
and will remain on steady for approximately 2
minutes after the first selection of "D" (drive)
range each time, until service is performed and
the indicator is reset.
Failure to perform maintenance and reset the
TRANSMISSION SERVICE indicator within a
defined period will result in the illumination of the
CHECK light with associated message in the DID
and diagnostic code P0897 Transmission Fluid
Deteriorated.
SERVICE indicator
SERVICE indicator
of such operating
will