Sea-doo 2003 GTI LE RFI, Shop Manual

Page: 403 / 779

Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
08-03-2
SMR2003_027 _08_03A.FM
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.
On some 4-TEC models , there is a valve on fuel
inlet hose connected to the fuel rail. This valve is
for manufacturing purpose only.
ELECTRICAL SYSTEM
It is important to check that the following electrical
system components are 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 re-
move the original part and replace it with one
which is in good condition.
Never use a battery charger to substitute tempo-
rarily the battery, as it may cause the MPEM/EMS
ECU to work erratically or not to work at all. Check
related-circuit fuse solidity and condition with an
ohmmeter. Visual inspection could lead to false re-
sults.
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 terminals
are not out of their connectors or out of shape. The
troubleshooting procedures cover problems not
resulting from one of these causes.
Before replacing a MPEM or EMS ECU, always
check electrical connections. Make sure that they are
very tight and they make good contact and that they
are corrosion-free. Particularly check MPEM and
EMS ECU ground connections. Ensure that con-
tacts are good and clean. A “defective module”
could possibly be repaired simply by unplugging
and replugging the MPEM or EMS ECU. The volt-
age and current might be too weak to go through
dirty wire terminals. Check carefully if terminals
show signs of moisture, corrosion or if they look
dull. Clean terminals properly and then coat them
prior to assembling as follows:
AMP connectors, EMS ECU connectors, OPS
and OSPS connectors:
Apply a thin coat of DEOX-
IT contact lubricant (P/N 293 550 034)
Other connectors: Apply a silicon-based dielectric
grease or other appropriate lubricant. If the newly
replaced MPEM or EMS ECU is working, 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.

WARNING
If any gasoline leak and/or odor are present,
do not start the engine. Repair the leak.

WARNING
Never use a hose pincher on high pressure
hoses.

WARNING
PRESSURIZED FUEL
Do not unscrew protective cap.
Do not operate the watercraft without cap
properly installed.

WARNING
All electrical actuators (idle bypass valve,
TOPS valve, injectors, fuel pump, ignition coils
and starter solenoid) are permanently sup-
plied by the battery when the safety lanyard is
installed. Always disconnect the battery prior
to disconnecting any electric or electronic
parts.

WARNING
Ensure all terminals are properly crimped on
wires and connector are properly fastened.
www.SeaDooManuals.net