PREVOST X3-45 COMMUTER User Manual

SECTION 06: ELECTRICAL
16
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 06 revised release October 2021
2.9 COOLING FAN CONNECTIONS
FIGURE 5: COOLING FANS CIRCUIT BREAKER BOX -
CONNECTOR NUMBER
FIGURE 6: COOLING FAN IDENTIFICATION
WARNING
WHEN THE ENGINE IS RUNNING…
Cooling fans may start running
at any
moment.
Keep hands away from cooling fans or keep
the radiator door closed.
WARNING
Cooling fans may be running when the
engine is shut down in t
he following
conditions:
•
If a High Exhaust Temperature
condition exists (e.g. following
regeneration). The CAC fans will keep
running for a maximum of 15 minutes.
• During the Electric Motors Test
Sequence, the cooling fans will start
running briefly.
The CAC fans and the radiator fans are
controlled by two multiplex modules, i.e. AE49 &
AE52. Each module controls one (1) CAC fan
and three (3) radiator fans. For this reason, if
one module fails, sufficient cooling will still be
available for the CAC and the radiator through
the second module.
Module AE49: Fans 1, 4, 6, 8
Module AE54: Fans 2 3, 5, 7
If one fan doesn’t function, diagnose the
probable causes of failure for this particular fan.
If one CAC fan and three radiator fans are not
functioning, then you should suspect that one of
the multiplex modules (AE49 or AE52) is
defective.
2.10 ELECTRONIC GROUND
All the electronic modules installed on this
vehicle are grounded to the electronic ground
stud located in the main power compartment,
using separate and protected circuits.
All the loads fed by a particular electronic
module are grounded to that same module.
However, a load can be grounded to another
module in the situation when the load can be
powered by two different modules for
redundancy need.

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