Ski-Doo Ski Doo MX Z 2005 [1143/1429] Fuel pump

Ski-Doo Ski Doo MX Z 2005 [1143/1429] Fuel pump
Section 05 ENGINE MANAGEMENT (2-TEC)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
FUEL PUMP
Fuel Pressure Test
Before proceeding to the pressure test, ensure
the battery is fully charged. Battery voltage must
be over 12 volts.
Release the fuel pressure in the system using
B.U.D.S. Refer to the Activation tab.
WARNING
The fuel hose may be under pressure. Cov-
er the fuel line connection with an absorbent
shop rag. Slowly disconnect the fuel hose
toreleasethepressure. Wipeoffanyfuel
spillage inside engine compartment.
The pressure test will show the available pressure
at the fuel pump outlet. It validates the pressure
regulator, the fuel pump and leaks in the system.
Ensure there is no leak from hoses and fittings.
Repair any leak.
Ensure there is enough gas in fuel tank.
Disconnect outlet hose from fuel pump.
Install fuel pressure gauge (P/N 529 035 591) be-
tween disconnected hose (inline installation).
529 035 591
Remove tether cord cap. Depress START/RER
button and observe fuel pressure. Do not crank
engine. Repeat twice. Release pressure using
B.U.D.S. between tests so that the gauge is re-
set to zero (0).
FUEL PRESSURE
(WHEN DEPRESSING START BUTTON)
400kPa(58PSI)
Crank or start engine and observe fuel pressure.
The fuel pressure should be the same as above.
If pressure is within limits, fuel pump and pressure
regulator are working adequately.
A rapid pressure drop indicates leakage either
from the fuel rail or from the fuel pump check
valve. Check fuel rail for leaks. If it is not leaking
then replace fuel pump.
A slow pressure drop indicates leakage either
from the fuel injector or from the fuel pump check
valve. Check fuel injector for leaks (see below).
If it is not leaking then replace fuel pump module.
Release fuel pressure in the system using
B.U.D.S. Look in the Activation tab.
Remove pressure gauge and plastic clip from inlet
hose. Reinstall fuel hose.
WARNING
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.
Reinstall removed parts.
Electrical Test
When depressing the START/RER button, the fuel
pump should run for 2 seconds to build up the
pressure in the system.
If the pump does not work, disconnect the plug
connector from the fuel pump.
Install a temporary connector to the fuel pump
connector. Apply 12 V (+ on PINK wire and on
PINK/BLACK wire) to this test harness.
If pump does not run, replace the fuel pump mod-
ule.
Otherwise, probe PINK wire and battery ground
of fuel pump connector on vehicle harness side.
When depressing the START/RER button, you
should read battery voltage for approximately 2
seconds (then, the voltage will drop). If battery
voltage does not appear, the problem can be
infuse, relay, harness or in fuel pump connector.
Repair or replace appropriate part (fuel pump may
be blown).
278 mmr2005-029

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