Appendix B - Troubleshooting Guide For Multiplex Vehicles - PREVOST X3-45 COACH 2018 Operator's Manual

Appendix B –
Troubleshooting
Problem/Symptom
Vehicle does not Start
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
Troubleshooting Guide for Multiplex Vehicles
Probable Causes
The Engine Stop pushbutton
located on the rear start
panel is depressed
Main electrical shut-off switch
is in the OFF position
CAN network
(Multiplex)
Module AE53 not powered or
is defective
Engine ECM does
receive the ignition signal
Engine ECM is not powered
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
PA1627 X3-45 Operator's Manual
1. Pull or
pushbutton to place it in normal
operating position, check that the
main electrical shut-off switch is in the
ON position and retry cranking from
the ignition switch
2. Start the vehicle from the engine
compartment using the rear start
button
If the vehicle does not start from the rear:
problem 1. Verify that module A53 is powered:
a) Check the SYSTEM DIAGNOSTIC
menu of Driver Information Display
(DID). Select FAULT DIAGNOSTIC
and ELECTRICAL SYSTEM. The
message "No Response ModA53,
Active", indicates a power problem
on the module or a CAN network
problem.
not b) Check / reset circuit breaker CB5
c) Check / replace fuse F65
d) Probe gray connector on module to
see if it is powered.
2. Verify that
powered and get the ignition signal
a) Check / reset circuit breaker CB8
Check / replace fuse F74
b) Check / reset circuit breaker CB2
Check / replace fuse F78
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.
Actions
twist the Engine
the engine ECM
DID indicates "MUX
WAIT" until
1
Stop
is
the