Technical data

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

F06H0SA