PREVOST H3-45 VIP Owner's Manual page 215

Problem / Symptom
None of the Multiplexed
functions are operating,
including the basic limp-
home functions
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
dashes "--"
Probable Causes
The program version in the
MCM is different than the
program in the I/O modules and
(door the MCM is forcing all I/O
modules to stay inactive
The MCM module does not
receive 24 V power.
The DL0 (BBUS MUX) 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
the network.
Problem with the temperature
sensor located
evaporator compartment
intake or the sensor wiring
two
PA-1638 Owner's Manual X3-45 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
2. Operate in limp-home mode by starting
the
compartment
functions
available
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
in the temperature by playing with the passenger set
air 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