Ski-Doo Ski Doo MX Z 2005 [1176/1429] Electrical system
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Ski-Doo Ski Doo MX Z 2005 [1176/1429] Electrical system

Ski-Doo Ski Doo MX Z 2005 [1176/1429] Electrical system
Section 06 ENGINE MANAGEMENT (4-TEC)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
529 035 981
WARNING
Fuel lines remain under pressure at all times.
Always proceed with care and use appro-
priate safety equipment when working on
pressurized fuel system. Wear safety glass-
es and work in a well ventilated area. Do
not allow fuel to spill on hot engine parts
and/or on electrical connectors. Proceed
with care when removing/installing pressure
test equipment or disconnecting fuel line
connections. Use the VCK (Vehicle Commu-
nication Kit) to release fuel pressure prior to
removing a hose. Cover the fuel line con-
nection with an absorbent shop rag. Slowly
disconnect the fuel hose to minimize spilling.
Wipe off any fuel spillage in the engine com-
partment. Fuel is flammable and explosive
under certain conditions. Always work in
a well ventilated area. Always disconnect
battery prior to working on the fuel system.
After performing a pressure test, use the
valve on the fuel pressure gauge to release
the pressure (if so equipped).
– Always disconnect battery properly prior to
working on the fuel system. Refer to BATTERY
section.
When the job is done, ensure that hoses from fu-
el rail going to fuel pump are properly secured in
their supports. Then, pressurize the fuel system.
Perform the pressure test as explained in this sec-
tion and pressurize the fuel tank and fuel lines as
explained in FUEL SYSTEM section.
Properly reconnect the battery.
WARNING
Ensure to verify fuel line connections for
damage and that NO fuel line is disconnected
prior to installing the tether cord cap on the
DESS post. Always perform the pressure
test if any component has been removed.
A pressure test must be done before con-
necting the tether cord cap. The fuel pump
is started each time the tether cord cap is
installed and it builds pressure very quickly.
To check fuel rails for leaks, first pressurize the
system then spray soapy water on all hose con-
nections, regulators and injectors. Air bubbles will
show the leaking area. Check also for leaking fuel
or fuel odor.
WARNING
Never use a hose pincher on injection system
high pressure hoses.
ELECTRICAL SYSTEM
It is important to check that the electrical system
is functioning properly:
– battery
– fuses
– DESS
– ignition (spark)
– ground connections
– wiring connectors.
It is possible that a component seems to operate
in static condition but in fact, it is defective. In
this case, the best way to solve this problem is
to remove the original part and replace it with one
which is in good condition.
Never use a battery charger to substitute tem-
porarily the battery, as it may cause the ECM
(engine control module) to work erratically or not
to work at all. Check related-circuit fuse solidity
and condition with an ohmmeter. Visual inspec-
tion could lead to false results.
312 mmr2005-032

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