PREVOST X3-45 Multiplex, Руководство по обслуживанию

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Section 06: ELECTRICAL
PA1562
31
Problem/Symptom Probable Causes Actions
4. Press the push-button one time to
engage the clutch in 1
st
speed, press
a second time to engage in 2
nd
speed, press a third time to stop the
fan, press once again to return to 1
st
speed.
If the fan clutch does not engage using
this procedure then the clutch is faulty or
the wiring between the multiplex module
and the clutch is faulty. Mechanically lock
the fan clutch as described in section 05:
COOLING
SYSTEM of the maintenance
manual.
4.8 ESSENTIAL FUNCTIONS TO OPERATE
THE VEHICLE
Even with a defective CECM (Chassis Electronic
Control Module) or a CAN network problem,
essential base functions are maintained to rear
start the vehicle from the engine compartment
and drive in a secure manner.
However, many secondary functions are lost. In
this case, the following directives must be
followed.
o
Never connect a battery charger when the
ignition is at the ON position on a vehicle with
a CAN defective or certain functions will start
up by themselves,
o
Disconnect the charger before starting the
vehicle, if not the default functions will not
activate,
o
If the default mode does not activate, try to
turn the ignition OFF while ensuring that no
charger is connected and then restart the
vehicle.
4.8.1 Available Functions
o
Startup: Turn on the ignition in the driver's
area and rear start the vehicle from the
engine compartment,
o
Opening the door: Functions normally,
o
Closing the door: Manually pull on the door
and it will lock automatically,
o
Windshield wipers: Wipers functions at 1st
speed only,
o
Headlights: Low beams only,
o
Directional signals: Rear and front only,
o
Stoplights: 2 upper stop high-mounted
stoplight are functional,
o
HVAC: Functional with set point fixed at 70°F
(22°C), evaporator and condenser fixed at
speed 1, defroster fixed at speed 4.
4.9 LOWER PRIORITY MODULES FOR
BREAKDOWN SERVICE
Modules A43 (IO-A) and A44 (IO-B) affect lower
priority functions. These modules can therefore
be used as spare parts for breakdown service
while on the road.
Functions lost if A43 is removed and used as
spare part:
o
High beams,
o
Ability to turn on the parking lights only,
o
« Watch your step » sign,
o
Driver's area lighting,
o
Tag axle activation,
o
Courtesy lights.
Functions lost if A44 is removed and used as
spare part:
o
Fresh air damper mix trap control,
o
Driver's area and entrance overhead light,
o
Front clearance lights.