Ski-Doo Ski Doo MX Z 2005 [657/1429] Electrical system
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Ski-Doo Ski Doo MX Z 2005 [657/1429] Electrical system

Ski-Doo Ski Doo MX Z 2005 [657/1429] Electrical system
Section 04 ENGINE MANAGEMENT (SDI)
Subsection 03 (COMPONENT INSPECTION, REPLACEMENT 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 glasses
and work in a well ventilated area. Proceed
with care when removing/installing high
pressure test equipment or disconnecting
fuel line connections. Use the VCK to release
fuel pressure prior to removing a hose. Cov-
er the fuel line connection with an absorbent
shop rag. Slowly disconnect the fuel hose
to minimize spilling. Do not allow fuel to
spill on hot engine parts and/or on electrical
connectors. Wipe off any fuel spillage in the
engine compartment. Fuel is flammable and
explosive under certain conditions. Always
disconnect battery or remove 30 A fuse prior
to working on the fuel system. After per-
forming a pressure test, release the pressure.
– Always disconnect battery properly or remove
30 A fuse prior to working on the fuel system.
Refer to BATTERY section.
Fuel Rail and Hose
Pressure at fuel rail is supplied and controlled by
the electric fuel pump.
When a repair is completed, ensure that hose be-
tween fuel rail and fuel pump is properly secured
in the supports. Then, perform a fuel pressure
test. Refer to FUEL SYSTEM.
To remove fuel rail, refer to FUEL INJECTORS in
this section.
WARNING
Ensure to verify fuel line connections for
damage and that NO fuel line is disconnect-
ed prior to installing the tether cord cap on
the DESS post. Always perform the high
pressure test if any component has been
removed. The fuel pump is started and pres-
sure quickly builds-up each time the tether
cord cap is installed and the START/RER but-
ton is depressed (or rewind starter is pulled).
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
– capacitor (manual start models)
– fuses
– relays
– 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.
WARNING
All electrical actuators (injectors, fuel pump,
ignition coils and starter solenoid) are con-
tinuously supplied by the battery when the
start button is depressed or if engine is rotat-
ed (with the rewind starter). Always discon-
nect the tether cord cap and the battery pri-
or to disconnecting any electric or electronic
parts.
136 mmr2005-126

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