PREVOST H3-45 VIP Owner's Manual page 235

Problem / Symptom
None of the Multiplexed
functions are operating,
including the basic limp-
home functions (door
opening, flashers, wipers
in speed 1)
"FLIP REAR BREAKER
TO INITIATE I/O
MODULES
PROGRAMMING" pop-
up message appears in
the DID
Note: The sunshades are
still functioning since
these are not multiplexed
Many of the non-essential
secondary functions are
not functioning (interior
lighting, driver's area
lighting, wiper speed 2
and intermittent).
Marker lights and
clearance lights are
turned ON when setting
ignition to the ON
position.
No temperature control in
the passenger area
Passenger temperature
display indicates two
dashes "--"
Probable Causes
The program version in the
MCM is different than the
program in the I/O modules
and the MCM is forcing all
I/O modules to stay inactive
The MCM module does not
receive 24 V power.
The DL0 (BBUS
network is not working. It
could be caused by a short
on the network, an open
circuit, a problem with the
MCM or the MCM being
disconnected from
network.
Problem with the temperature
sensor located in
evaporator compartment air
intake or the sensor wiring
PA-1619 Owner's Manual H3-45 VIP
Multiplex Troubleshooting B-3
1. Engage the auto- programming of the
I/O modules: Turn the ignition key to the
ON position, trip and reset circuit
breaker CB6.
2. The
AUTOPROGRAMMING I/O MODULE
PLEASE
reprogramming is complete.
1. Check / reset circuit breaker CB6.
Check / replace fuse F1
MUX)
2. Operate in limp-home mode by starting
the
compartment
functions
available
the
To close and lock the door, pull the door
manually up to its closed position and it will
lock by itself. The door opening button is still
functioning
Instruct the driver to manually control the
the temperature by playing with the passenger
set point. Set above 22°C (72°F) to heat and
below 22° C (72°F) to cool
Actions
DID indicates
WAIT" until
vehicle from the
(REAR START).
essential to drive
"MUX
the
engine
All
are