PREVOST X3-45 COMMUTER User Manual

SECTION 06: ELECTRICAL
24
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 06 revised release October 2021
• Service chime enable switch,
• Horn selector switch,
• Outside rear view mirror heat,
• Mirror control switches,
• Low-buoy switch,
• Starter sensor,
• ABS warning input,
• WCL switch,
• Driver's power window switch,
• Alternator sensors 1 & 2,
• Retarder active signal,
• Radiator fan speed 1 & 2 signals.
In test mode, with the parking brake applied and
the passenger set point set to a value higher
than 64°F (18°C), the circulator pump is not set
to OFF as it would normally do when the outside
temperature gets above 50°F (10°C). This
feature allows verification of the pump when
inside a garage. This is also useful when
working on the heating system to remove air
pockets trapped in the system.
When performing an A/C cooling test and having
the water pump shut off is required, initiate the
multiplex input test mode. While in this mode,
just set the passenger set point temperature to
the minimum 64°F (18°C) to shut off the pump.
4.2 Electric Motor Test Sequence
This test mode allows testing of the electric
motors, the A/C compressor clutch and unloader
and the HVAC system solenoid valves without
the need to have the engine running. Note that
while in test mode, the engine cannot be started.
Prerequisite conditions for the motor test mode:
A. A battery charger must be connected. If not,
the test will be interrupted when the voltage
drops below 24.4 volts,
B. Engine not running,
C. Parking brake applied,
DANGER
Before starting the test sequence, make sure
that no one is doing maintenance in the
evaporator compartment, the condenser
compartment or
close to the CAC & radiator
electric cooling fans.
NOTE
The back-up alarm will sound (beep) ten (10)
times prior the test starts to warn the persons
who do work on the vehicle. Moreover, the
alarm will beep to tell the person conducting
the electric motors test sequence to move to
the next test location on the vehicle.
To enter this mode:
• Using the dashboard DID, select
DIAGNOSTICS menu and press ENTER
button ;
• Select VEHICLE TEST, press ENTER button
then select START ELECTRIC MOTORS
TEST and press ENTER button to initiate the
test mode for electrical motors;
• Ten (10) beeps can be heard indicating the
motor test mode has started.
Using the test mode:
• During the entire test, the telltale panel
audible alarm gives a signal each second to
remind that the motor test mode is underway.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in