Essential Functions To Operate The Vehicle; Available Functions; Networks; Dl0 (Bbus Mux) Network - PREVOST H3-41 Maintenance Manual

Prerequisite condition: The engine is running
(fast idle if at stand still).
1. On the Driver Information Display, select
DIAGNOSTICS menu. Select VEHICLE
TESTS submenu
RADIATOR FAN SPEED 50% or FORCE
RADIATOR FAN SPEED100% as required.
2. The DID status line will show TEST to
confirm the forced activation of the radiator
fan clutch. To cancel, turn the ignition
switch to the OFF position or press
ESCAPE button,
TESTS & FORCED STATES submenu and
then press ENTER button twice. TEST will
disappear from the DID status line.
WARNING
Keep hands away from the cooling fans as
they may start running at any moment.
5.4 ESSENTIAL FUNCTIONS TO OPERATE
THE VEHICLE
Even with a defective MCM (Chassis Control
Module) or a DL0 (BBUS MUX) network
problem, essential
maintained to rear start the vehicle from the
engine compartment
manner.
However, many secondary functions are lost. In
this case, the following directives must be
followed.
• Never connect a battery charger when the
ignition is at the ON position on a vehicle with
a DL0 (BBUS MUX) defective or certain
functions will start up by themselves,
and then FORCE
select TERMINATE
base functions are
and drive in a secure
PA1621 Maintenance Manual All Series | Revised Sept 2019
SECTION 06: ELECTRICAL
• Disconnect the charger before starting the
vehicle, if not the default functions will not
activate,
• If the default mode does not activate, try to
turn the ignition OFF while ensuring that no
charger is connected and then restart the
vehicle.
5.4.1

Available Functions

• Startup: Turn on the ignition in the driver's
area and rear start the vehicle from the
engine compartment,
• Opening the door: Functions normally,
• Closing the door: Manually pull on the door
and it will lock automatically,
• Windshield wipers: Wipers functions at 1st
speed only,
• Headlamps: Low beams only,
• Directional signals: Rear and front only,
• Stoplights: 2 upper stoplights + high-mounted
stoplight are functional,
• HVAC: Functional with set point fixed at 70°F
(22°C), evaporator and condenser fixed at
speed 1, defroster fixed at speed 4.
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
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