PREVOST X3-45 COMMUTER User Manual

SECTION 06: ELECTRICAL
30
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 06 revised release October 2021
7. TROUBLESHOOTING
7.1 PROBING VOLTAGE ON THE
MULTIPLEX CIRCUITS
Some Multiplex modules are supplied by 12
volts while others are supplied by 24 volts. The
12-volt or 24-volt information is found on the
modules symbol in the wiring diagram. Before
taking voltage readings to track the source of a
problem, first verify if the module is supplied by
12V or 24V, if not, residual voltage on the
module inputs/outputs can draw an erroneous
conclusion.
Inactive Multiplex output = Residual voltage of
18% to 33% of supply voltage.
Inactive Multiplex input = Residual voltage of
50% of supply voltage.
NOTE
o Verify on the wiri
ng diagram whether the
voltage is 12V or 24V,
o For a 12V module: an active voltage would
be 12V or 0V but not i
n between. If you
measure the intermediate tensions (ex. 6V,
2V, or 4V) this must be interpreted as if the
input or the output is inactive.
o For a 24V module: an active voltage would
be 24V or 0V but not in between. If you
measure the intermediate tensions (ex.
12V, 4V, or 8V) this must be interpreted as
if the input or the output is inactive.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in