Appendix B - Troubleshooting Guide for Multiplex Vehicles
5
!
Problem/Symptom
Probable Causes
Actio
ns
2. Check / reset circuit breaker CB5
3. Check / replace fuse F67 , F68
4. Probe gray connector on module to
see if it is powered.
Sound system not
functioning
Circuit breaker CB4 or
CB11 was manually tripped
and not reset
Check / reset circuit breaker CB4 or
CB11
Fire alarm telltale light
a n d a u d i b l e a l a r m
always ON and there is
n o f i r e o r h i g h
t e m p e r a t u r e i n t h e
engine compartment
Short-circuited fire sensor or
defective sensor
Prior to start the vehicle, cycle the
ignition key to the ON position, OFF
position and then ON position again and
then start the vehicle. This will
deactivate the fire alarm function. This
has to be repeated each time the
vehicle is re-started
The vehicle is parked
and
Short-circuited fire sensor or
Cycle the ignition key between the ON
and
the electrical horn is acti-
defective sensor
OFF position twice within 3 seconds. This
vated to indicate a fire in
will deactivate the fire alarm function.
This
the engine compartment
has to be repeated each time the vehicle
but there is no fire
is parked
A single light, a group of
LED lights or another
function of the vehicle is
not functioning
The multiplex outputs are
protected in current by an
internal “soft-fuse”. When
an output is shorted, it
turns OFF and stays OFF
until the "soft-fuse" is reset
Turn the ignition key to the OFF position
and turn to the ON position again. This
resets all "soft –fuses"
No backlighting in the
instrument cluster
Circuit breaker CB10
is tripped or fuse F20 blown
Check / reset circuit breaker CB10
Check / replace fuse F20
The radiator fan clutch
does not function and
the engine is
overheating
1.
Set the ignition key to the ON
position.
2.
Activate the dashboard Telltale
Light Test switch 3 times within 4
seconds.
3. In the engine compartment, set the
starter selector switch to REAR
START and then start the engine
from the rear.
While in this mode, the rear start push-
button can be used to manually engage
the fan clutch. The Multiplex system
knows when the engine is already
running, and it will not activate the
starter.
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: ... ...
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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 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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