Intelligent Sleep Mode (Ism); Transmission Retarder - PREVOST X3-45 Commuter 2020 Operating 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 switch 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 Idle Shut Down (ISD) function has
stopped the engine automatically;
2. The vehicle Ignition switch is ON, but
engine is not running. ISM monitor the
battery SOC and the battery voltage, to
determine if the sleep mode should be
activated
3. The ignition is OFF for 15 minutes, the
system is in its wake-up period. The ISM
could decide to shorten the period,
depending on SOC and battery voltages.
4. 24V ISM activation limit: 24Vbat < 24.4V
5. 12V ISM activation limit: 12Vbat < 12.2V
6. The battery state of charge of 12V or 24V
system falls below 65%.
If the voltages drop below the limits shown above,
the Equalizer will trig the Accessories Sleep
Mode (ASM) and
components from supply in parcel rack.
The red ALTERNATOR telltale will
turn on 30 seconds before activation
of the sleep mode.
DOB 1300-1556
or
or
disconnect almost

TRANSMISSION RETARDER

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.
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.
Three levels of retarding power are available with
the output retarder enabled: 1/3 of total retarding
power is applied as soon as the brake pedal is
pressed. If more force is applied to the brake
pedal, 1/3 of retarding power is added. Finally,
with full force applied to the brake pedal, an
additional 1/3 of retarding power is added for a
of
total of 100% of the available output retarding
power.
Action
Initial pressure on the
brake pedal
Additional pressure on
service brake pedal
PA-1639 Operator's Manual 2020 X3-45 Commuter
Other Features 5-27
Press this rocker switch on the L.H.
dashboard panel to activate the
transmission retarder.
NOTE
Deactivating the
retarder will turn on the indicator light
located at the front of the coach.
Retarding Power
33% of total retarding
power
66% of total retarding
power
transmission