PREVOST H3-45 VIP Owner's Manual page 114

5-8 Other Features
DEF TANK LEVEL - DRIVER WARNING AND INDUCEMENT
Conditions / Triggers
Normal
1
DEF tank level sensor reads
between 100% and 12%
2 Low DEF tank warning
DEF tank level sensor reads
between 12% and 0.1%
3 DEF tank near empty
DEF tank level sensor reads less
than 0.1%
4 DEF tank empty and one (1) hour
of operation in engine derate mode
5 DEF tank empty and either
1. Diesel fuel refueling done
with a fuel level sensor
reading increase of 15%, or
more
2. Vehicle stationary (speed=0)
for 20 minutes with engine
off or at idle
DEF Tank LOW LEVEL Indicator, DID
Message and audible warning
None
DEF TANK LEVEL LOW
REFILL DEF SOON TO
PREVENT ENGINE DERATE
solid
DEF TANK EMPTY
REFILL DEF TO AVOID 5
MPH LIMIT
blinking
ENGINE IN DERATE
DEF TANK EMPTY
REFILL DEF TO AVOID 5
MPH LIMIT
blinking
ENGINE IN DERATE
REFILL DEF TANK
VEHICLE SPEED LIMITED
TO 5 MPH (8 KM/H)
blinking
PA-1638 Owner's Manual X3-45 VIP
3 beeps
3 beeps
3 beeps
constant tone
Inducement
None
Warning message
Engine torque
reduction of 25%
Engine torque
reduction of 40%
Vehicle road speed
limited (RSL) to 5
mph (8 km/h)
Note: The vehicle
has to be stationary
before 5 mph (8
km/h) road speed
limit becomes active