Appendix B –
Troubleshooting Guide for Multiplex Vehicles
1
Troubleshooting
Problem/Symptom
Probable Causes
Actio
ns
Vehicle does not Start
Rear Start selector switch is
not in the NORMAL position
Master cut-out switch on
the rear electrical panel is
in the OFF position (down)
1. Check that the rear start selector
switch is flipped up to NORMAL
start position and master cut-out
switch is flipped up to ON and retry
cranking
2. Flip the rear start selector switch to
“Rear Start” and start the vehicle
from the rear
If the vehicle does not start from the rear:
CAN
network
problem (Multiplex)
Module A53 not powered
or is defective
1. Verify that module A53 is powered:
a) C h e c k
t h e
S Y S T E M
DIAGNOSTIC menu of the Driver
Information Display (DID). Select
FA U LT D I A G N O S T I C a n d
ELECTRICAL SYSTEM. The
message “No Response ModA53,
Active”, indicates a power
problem on the module or a CAN
network problem.
Engine
ECM
does
not receive the ignition
signal
b) Check / reset circuit breaker CB5
c) Check / replace fuse F65
d) Probe gray connector on module to
see if it is powered.
Engine ECM is not powered
2. Verify that the engine ECM is 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
None of the Multiplexed
functions are operating,
including the basic limp-
home functions (door
o p e n i n g , f l a s h e r s ,
wipers in speed 1)
T h r e e d a s h e s “ - - - “
appear in the telltale
panel instead of the
outside temperature
The program version in the
CECM is different than the
program in the I/O modules
and the CECM is forcing all
I/O modules to stay inactive
1. Engage the auto-programming of the
I/O modules: Turn the ignition key to
the OFF position, flip the master cut-
out switch on the rear electrical
panel to OFF and ON and then turn
the ignition key ON. The letters CAN
will appear in the telltale LCD panel
for about 3 minutes Everything shall
get back to normal once the letters
CAN are replaced with outside
temperature display
Note: The sunshades
are still functioning
since these are not
multiplexed
2. Try disconnecting the green
connector on the CECM and
reconnect
3. If step 1 and 2 are ineffective, try
disconnecting the Master ID module
completely and repeat step 1
Summary of Contents for X3-45 COACH
Page 1: ...OPERATOR S MANUAL X3 45 COACH ...
Page 2: ......
Page 3: ...COACH MANUFACTURER OPERATOR S MANUAL X3 45 COACH PA1609 December 2015 ...
Page 8: ......
Page 13: ......
Page 18: ... WARNING Unless otherwise stated do not run the engine when the engine compartment is open ...
Page 25: ...either open or shut A key is provided for unlocking the door if the option was chosen ...
Page 153: ... ...
Page 164: ......
Page 176: ......
Page 189: ...INTERIOR UNLATCH AIR VALVE 12164 ...
Page 190: ...7 4 Safety Features and Equipment UNLATCH AIR VALVE LOCATION 12209 ...
Page 192: ...an audible alarm will sound 2 The operator shall bring the vehicle to a safe stop ...
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Page 220: ......
Page 239: ...9 2 Technical Information VEHICLE IDENTIFICATION NUMBER VIN 13 COACH FINAL RECORD 13 ...
Page 240: ...Technical Information 9 3 X3 45 OVERALL DIMENSIONS SIDE ELEVATION 18673_1 ...
Page 241: ...9 4 Technical Information X3 45 OVERALL DIMENSIONS TOP FRONT AND REAR VIEWS 18674_1 ...
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Page 264: ...4 Try disconnecting the CECM ...
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