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
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6. NETWORKS
Networks identification
NETWORKS
J1939 - DL0 (Bbus Mux)
- DL1 (drivetrain control network)
- DL3 (Dbus Mux)
- DL7 (engine subnet)
- DL9 (engine transmission/I-Shift
subnet)
J2284 - DL2
J1587 - DL4 (powertrain subnet 900/901)
6.1 DL0 (BBUS MUX) NETWORK
The DL0 (BBUS MUX) network wiring is
separated in sections and uses the following
connectors that are not shared with other
circuits: C1, C3, C5, C13, C100. These
connectors allow sections of the network to be
isolated to help locate short-circuit on the DL0
(BBUS MUX).
In case of a short-circuit on the DL0 (BBUS
MUX) network, this affects all the modules and
they all act as “No response” in the error
messages of the VIEW ACTIVE
FAULTS/ELECTRICAL menu. To locate a short-
circuit, proceed by disconnecting one module
zone at a time while verifying if this makes
inactive the errors in the modules still
connected. Connector C1 (front electrical &
service compartment) disconnects all the
modules at the rear of the vehicle from the
network. Connector C5 (front electrical & service
compartment) disconnects all the modules from
the entrance door & wiper control panel.
Connector C3 (rear electrical panel) disconnects
all the modules at the rear of the vehicle from
the network.
Example: Disconnect C5 and C1 and then verify the
status of the errors. If the front modules (A41 to A46)
now give inactive errors, which means short-circuit is
elsewhere than in the front electrical & service
compartment.
6.2 DL0 (BBUS MUX) CONNECTION ON
THE TELLTALE PANEL AND THE HVAC
CONTROL UNIT
The telltale panel module and HVAC module are
linked to the MCM by a DL0 (BBUS MUX)
connection. In case of a connection default, the
telltale panel LCD display shows "CAN", and on
the HVAC control unit, the temperature display
indicates "---". To confirm a connection default,
check that the fan speed on the driver's section
HVAC control unit cannot be adjusted.
Moreover, specific error messages from these 2
modules can be read in the ELECTRICAL menu.
NOTE
While downloading a new vehicle program in
the MCM from a computer, the DL0 (BBUS
MUX) network is temporarily interrupted and
therefore a DL0 (BBUS MUX) reference
appears in the telltale panel LCD display.
6.3 SPARE DL0 (BBUS MUX)
A spare DL0 (BBUS MUX) network is installed
between the front and the rear of the vehicle. It
has connectors installed at each end to facilitate
swapping from the regular DL0 (BBUS MUX)
network to the spare DL0 (BBUS MUX) network.
Refer to the vehicle wiring diagram and section
4.6 for more information.

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