PREVOST X3-45 COMMUTER, Руководство по обслуживанию

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SECTION 06: ELECTRICAL
26 DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version) – Sec 06 revised June 2017
spare can network. Refer to the vehicle wiring
diagram and section 4.6 for more information.
4.4 MULTIPLEX INPUT TEST MODE
The multiplex input test provides useful
information to diagnose multiplexed inputs of
switches and sensors, complimentary to the
electrical system diagnosis.
To initiate the test mode, use the driver
information display (DID) diagnostics menu.
Select vehicle tests submenu and then mux
input test. Pres enter button to start the test. The
DID status line will show test to confirm the test
mode is active. To exit test, press escape
button, select stop test submenu and then press
enter button twice. Test will disappear from the
DID status line.
Instrument panel audible alarm emits a
beep
each time an off/on transition is detected on a
multiplex input. This allows quick verifying if the
switches and sensors are detected or seen by
the multiplex modules. When the vehicle is
parked, the back-up alarm also emits a
beep
that allows verification of the sensors at the rear
of the vehicle.
Certain inputs are doubled (door operating
buttons) and also other inputs activate at the
same time (ex. Kneeling switch and kneeling
proximity sensor switch). For these inputs, 2
beeps
are emitted. If only one
beep
is heard,
one of the inputs is defective.
Switches and sensors supported by the
switch/sensor test mode
HVAC control unit driver’s section on/off
HVAC control unit driver recirculate switch
HVAC overhead compartment fan switch
Engine rear start selector switch “rear start”
Engine rear start selector switch “normal”
Engine ignition front switch
Engine ignition rear switch
Entrance door inside opening /closing switch
Entrance door outside opening /closing switch
Kneeling down switch
Electric horn button
Lh turn signal
Rh turn signal
Headlights beam toggle switch
Windshield wipers intermittent position switch
Windshield washer switch
Kneeling up switch
Interior lighting switch, 2 positions
Driver’s area lighting switch
Reading lights switch
Hazard warning flashers switch
Headlights switch, 2 positions
Tag axle lever
Wheelchair lift activation switch
Windshield lower wiper
The following inputs, either certain options or
sensors which are difficult to activate, are not
supported by the switch/sensor test:

Service chime enable switch,

Horn selector switch,

Outside rear view mirror heat,

Mirror control switches,

Low-buoy switch,

Starter sensor,

Abs warning input,

WCL switch,

Driver's power window switch,

Fog lights switch,

Alternator sensors 1 & 2,

Retarder active signal,

Radiator fan speed 1 & 2 signals.
In test mode, with the parking brake applied and
the passenger set point set to a value higher
than 64°f (18°c), the circulator pump is not set to
off as it would normally do when the outside
temperature gets above 50°f (10°c). This feature
allows verification of the pump when inside a
garage. This is also useful when working on the
heating system to remove air pockets trapped in
the system. Motor test sequence
4.5 MOTOR TEST SEQUENCE
This test mode allows testing of the electrical
motors and electric contactors without the need
to have the engine running. Note that while in
test mode, the engine cannot be started.
Prerequisite conditions for the motor test mode: