PREVOST X3-45 COMMUTER User Manual

SECTION 06: ELECTRICAL
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 06 revised release October 2021
41
Problem/Symptom Probable Causes Actions
Evaporator fan not
functioning
Circuit breaker CB3 tripped
Module AE54 is not powered
or is faulty
1. Check circuit breaker CB3
2. Check relay R12
3. Check the DIAGNOSTICS
menu of
Driver Information Di
splay (DID).
Select VIEW ACTIVE FAULTS and
ELECTRICAL
. The message “No
Response ModA54, Active” indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce this symptom).
4. Check / reset circuit breaker CB5
5. Check / reset CB135V
6.
Probe gray connector on module to
see if it is powered.
HVAC condenser fans not
functioning in speed 1
Module AE54 is not powered
or is faulty
1. Check the DIAGNOSTICS
menu of
Driver Information Display (DID).
Select VIEW ACTIVE FAULTS and
ELECTRICAL
. The message “No
Response ModA54, Active” indicates
a power problem on the module. (A
DL0 (BBUS MUX) network problem
would show the same message but
doesn't produce this symptom).
2. Check / reset circuit breaker CB5
3. Check / reset CB135V
4. Check /reset CB141V-CB144V
5.
Probe gray connector on module to
see if it is powered.
Parcel rack equipment not
functioning
Circuit breaker CB11 CB13
tripped
1. Check CB11, CB13
2. Check / reset CB148V
Fire alarm telltale light
and audible alarm always
ON and there is no fire or
high temperature in the
engine compartment
Short-circuited fire sensor or
defective sensor
Prior to start the vehicle, cycle the ignition
key to the ON position, OFF position and
then ON position again and then start the
vehicle. This will deactivate the fire alarm
function. This has to be repeated each
time the vehicle is re-started
The vehicle is parked and
the electrical horn is acti-
vated to indicate a fire in
the engine compartment
but there is no fire
Short-circuited fire sensor or
defective sensor
Cycle the ignition key between the ON
and OFF position twice within 3 seconds.
This will deactivate the fire alarm function.
This has to be repeated each time the
vehicle is parked

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