SeaDoo 2006 GTI, Shop Manual

Page: 592 / 801

Section 12 ELECTRICAL SYSTEM
Subsection 04 (INSTRUMENTS AND ACCESSORIES)
INSTRUMENTS AND ACCESSORIES
GENERAL
Install safety lanyard to activate MPEM to perform
testing procedures that requires the device to be
supplied with electricity.
POWER SUPPLY CUT-OFF
RELAY VERIFICATION
GTI Series and XP DI models
When the safety lanyard is on its switch, the re-
lay allows current to be supplied from the bat-
tery to the RED/PURPLE wire which supplies the
MPEM and all the electrical components (except
bilge pump which is connected to battery power
on
XP DI models ).
When the safety lanyard is NOT on its switch,
the relay cuts the current supply from the bat-
tery to the MPEM and the electrical components
thus preventing current drain that would slowly
discharge the battery.
The relay is located in cover of electrical box (on
MPEM box on
RFI models ).
Test the signal wire to the power supply cut-off
relay as follows:
Disconnect DESS switch wires.
Connect test probes to switch BLACK and BLACK/
PURPLE wires.
With safety lanyard NOT on its switch: Mea-
sure resistance. There should be NO continuity
(open circuit). Otherwise replace DESS switch.
With safety lanyard INSTALLED on its switch:
Measure resistance. There should be continuity.
Otherwise replace DESS switch.
If switch tests good in both checks, do the follow-
ing.
Disconnect the connector on electrical box.
Using a voltmeter, perform the following tests:
Connect test probes to the small RED wire on
the starter solenoid and on the RED/PURPLE wire
from the cut-off relay. Reading should be 0 V. Oth-
erwise, replace the cut-off relay.
Keeping the test probes on the same wires, con-
nect a jumper wire between the BLACK/PURPLE
wire from the cut-off relay to the battery ground.
Measure voltage. Reading should be 12 V. Oth-
erwise, check wiring and if it is good, replace the
cut-off relay.
If there is no current supply to the electrical com-
ponents while the DESS switch and the cut-off re-
lay test good, check the wiring harness. If it tests
good, the MPEM could be suspected. Try a new
one.
MULTI-PURPOSE ELECTRONIC
MODULE (MPEM)
GTI Series and XP DI models
The MPEM is directly powered by the battery
through the cut-off relay. It has a micro-processor
inside of its sealed case.
All the electrical system is controlled by the
MPEM. It is in charge of the following electrical
functions:
– interpreting information
– distributing information
– start/stop function
– Digitally Encoded Security System
– ignition timing curve
– engine rev limiter.
Some fuses are directly mounted onto the MPEM.
The MPEM features a permanent memory that
will keep the programmed safety lanyard(s) active
and other vehicle information, even when the bat-
tery is removed from the watercraft.
MPEM Functions
Safety Lanyard Reminder
If engine is not started within 5 seconds after
installing the safety lanyard on its post, 4 short
beeps every 3 second interval will sound for ap-
proximately 2 hours to remind you to start the en-
gine or to remove safety lanyard. Afterwards, the
beeps will stop. The same will occur when safety
lanyard is left on its post 5 seconds after engine is
stopped.
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