Snowmobile Ski Doo REV SERIES (2004 year). Manual - part 47
Section 05 2–TEC ENGINE MANAGEMENT
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
To check fuel rail for leaks, first pressurize the sys-
tem then spray soapy water on all hose connec-
tions, 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
– capacitor (manual start SDI models)
– 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.
WARNING
All electrical actuators (injectors, fuel pump,
ignition coils and starter solenoid) may be
suddenly supplied by the battery when the
tether cord cap is installed and the start
button is depressed or if engine is rotated
(manually or with the rewind starter). Even
a small movement of the crankshaft or the
usage of the supply cable (P/N 529 035 869)
will automatically activate the actuators. Al-
ways disconnect the tether cord cap and the
battery prior to disconnecting any electric or
electronic parts.
To perform verifications, a good quality multimeter
such as Fluke 111 (P/N 529 035 868) should be
used.
Pay particular attention to ensure that pins are
not out of their connectors or out of shape. The
troubleshooting procedures cover problems not
resulting from one of these causes.
CAUTION: Ensure all terminals are properly
crimped on wires and connector housings are
properly fastened.
CAUTION: Check if wiring harness shows any
signs of scoring prior to replace the ECM.
Before replacing a ECM, always check electrical
connections. Make sure that they are very tight
and they make good contact and that they are
corrosion- free. Particularly check ECM ground
connections. Ensure that contacts are good and
clean. A “defective module” could possibly be
repaired simply by unplugging and replugging the
ECM. The voltage and current might be too weak
to go through dirty wire pins. Check carefully if
pins show signs of moisture, corrosion or if they
look dull. Clean pins properly and then coat them
prior to assembling as follows:
Apply a silicon-based dielectric grease or other ap-
propriate lubricant.
NOTE: Do not apply dielectric grease or other lu-
bricant on the ECM connectors.
If the newly replaced ECM works, try the old one
and recheck if it works.
Ensure that all electronic components are genuine
– any modification on the wiring harness may lead
to generate fault codes or bad operation.
NOTE: For diagnostics purposes, use Vehicle
Communication Kit (VCK). See DIAGNOSTIC
PROCEDURES subsection.
After a problem has been solved, ensure to clear
the fault(s) in the ECM using the VCK. Refer to
DIAGNOSTIC PROCEDURES subsection.
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mmr2004-Rev