Intelligent Sleep Mode (Ism); Transmission Retarder (Option); Operating The Retarder Using The Control Stalk - PREVOST H3-45 2023 Operator's Manual

INTELLIGENT SLEEP MODE (ISM)

The ISM is a battery- saving mode designed to
protect the battery State Of Charge (SOC). The
ISM will automatically change the vehicle
electrical system from normal functional state to
sleep mode if the battery SOC falls below 65%.
Once the vehicle has entered into sleep mode,
the only actions needed to put the vehicle back
into its normal functional state are:
To cycle the ignition key from OFF to ON;
l
To open the entrance door;
l
To turn on the hazard lights.
l
The ISM forces the vehicle to go into sleep mode
if all the following conditions are met:
1. The engine is not running;
2. The parking brake is applied;
3. The ignition switch is at the ON, ACC positions or at
the OFF position but the 15 minutes "wake up"
period after engine shutdown is not expired;
4. The battery state of charge of 12V or 24V system
falls below 65%.
The ALTERNATOR telltale will turn
on 30 seconds before activation of
the sleep mode.

TRANSMISSION RETARDER (OPTION)

The transmission retarder helps to reduce the
speed of a vehicle. It improves vehicle control,
increases driving safety and permits more
economical operation. The retarder provides
slowing power when it is most needed, such as
when descending mountain roads, in stop-and-go
traffic and on crowded freeways.
The transmission retarder is a vehicle- slowing
device, not a vehicle-stopping device. It is not a
substitute for the service braking system. The
service brake must be used to bring the vehicle to
a complete stop.
or
or
PA-1652 Operator's Manual H3-45 Coach
NOTE
Extended use will raise the temperature of the
transmission fluid.
The retarder helps reduce speed on grades
without using the vehicle's conventional service
braking system. This virtually eliminates brake
overheating and reduces the risk of a runaway
vehicle. A retarder greatly increases the service
life of brake pads and discs, resulting in reduced
brake maintenance costs.
The retarder is provided with a control stalk on
the steering column (refer to "
BRAKE CONTROL STALKS" on page 41
Section 4 Controls and instruments).
WARNING
Do not use the retarder during inclement weather
or slippery road conditions.
NOTE
The stoplights automatically illuminate when
the vehicle is slowing down after application of
the transmission retarder.
NOTE
For vehicles equipped with the Antilock Braking
System (ABS), as the wheels start to lock up on
slippery roads, the
automatically deactivates until the wheels roll
freely.
OPERATING THE RETARDER USING THE
CONTROL STALK
The transmission retarder is available only with
the Allison transmission.
The retarder can be operated using the control
stalk mounted on the steering wheel column.
To use the transmission retarder, it must be
activated first by
momentary push button on the steering wheel
control stalk.
With the retarder enabled and the accelerator pedal
released, move the output retarder control stalk
from the first to the sixth position. The braking effect
occurs as soon as the accelerator pedal is
Other Features 5-11
"AUXILIARY
" in
output retarder
pressing the ON/OFF