Section 04
ELECTRICAL SYSTEM
Subsection 01
(IGNITION AND CHARGING SYSTEMS)
04-01-1
IGNITION AND CHARGING SYSTEMS
0
The ignition and charging systems of the 947 en-
gine are of the same type as the 787 engine.
The high amperage/voltage components (ignition
coil and solenoid) are located into a rear electrical
box.
To access the rear electrical box, remove seat and
vent tube support.
1. Rear electrical box
The other components are integrated to the Multi-
Purpose Electronic Module (MPEM).
On this model, the MPEM is a Nippondenso unit,
which features a built in rectifier/regulator.
1. Nippondenso Multi-Purpose Electronic Module
The MPEM is directly powered by the battery. It
has a micro-processor inside of its sealed case.
The MPEM is responsible of the following electri-
cal functions:
– interpreting information
– distributing information
– start/stop function
– timer
– Digitally Encoded Security System
– ignition
– engine rev limiter
– rectifying AC to DC
– regulating charging current
Fuses are directly mounted onto the MPEM.
To test the rectifier/regulator, proceed the same
way as explained in the
1997 Sea-Doo Shop Man-
ual (P/N 219 100 048).
Digitally Encoded Security System
For a stronger and more reliable signal of the safe-
ty lanyard, the amplifier of the throttle position
switch is also used for the Digitally Encoded Se-
curity System.
When installing the safety lanyard cap on the
switch, the amplifier boosts the signal sent to the
MPEM.
F06E06A
1
F06H0SA
1
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