Sea-doo Challenger 5896, Shop Manual

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Section 08 ELECTRICAL
Sub-Section 03 (IGNITION SYSTEM)
08-03-5
IGNITION SYSTEM TESTING PROCEDURE, 717 ENGINE
General
NOTE : The following section gives informa-
tion for both Sportster and Speedster mod-
els. To make the section shorter, the Sportster is
actually described and the differences for the
Speedster are added. Relative to the Speedster,
the Sportster MPEM is roughly half the Speedster
MPEM, actually the starboard (RH) portion.
NOTE : On occasion a component will stati-
cally check good but in fact be defective. In
this instance, removing the original part and re-
placing it with a known good part is the most ac-
curate procedure.
The MPEM (Multi-Purpose Electronic Module) is
part of the ignition system as well as part of elec-
trical system. This section gives testing proce-
dure for ignition-related problems. For other type
of problems, refer to MPEM section.
CAUTION : Whenever replacing a compo-
nent in ignition system, check ignition
timing.
Spark occurrence can be checked with a tester
from Superex Canada Ltd P
/ N 15-785.
To perform verifications, a good quality multime-
ter such as Fluke 73 (P
/ N 529 022 000) can be
used.
When dealing with ignition problems, the follow-
ing items should be checked in this order :
1. Spark occurrence / spark plug condition.
2. Battery condition.
3. MPEM supply fuse condition.
4. Electrical connections.
5. Engine stop / safety lanyard
6. MPEM
7. Magneto output.
8. Ignition coil output.
The first 5 items can be checked with common
automotive equipment. For item 6, refer to
MPEM section. For items 7 and 8, refer to the fol-
lowing procedures.
MPEM (Multi-Purpose Electronic
Module)
ENGINE RPM LIMITER
On Speedster model, there is one RPM limiter for
each engine in the MPEM.
A defective RPM limiter may cause the following
problems :
• No spark.
• Misfiring / black fouled spark plugs.
• Uninterrupted spark when engine stop / safety
lanyard / ignition switch is used.
• Incorrectly controlled engine maximum RPM.
To diagnose spark problems that might come
from the MPEM, first check that its BLACK wire
is perfectly grounded, then if there is no spark,
temporarily bypass the RPM limiter by discon-
necting the BLACK
/ RED /GREEN wire coming
from engine magneto system. If everything now
works normally, the RPM limiter is defective and
the MPEM must be replaced.
NOTE : The Speedster has an additional
BLACK /RED wire for port (LH) side engine.
Each engine has its own RPM limiter circuitry in-
side the MPEM.
If engine does not stop when using stop / safety
lanyard / ignition switch, ensure that BLACK / RED
/GREEN (additional BLACK / RED wire on Speed-
ster) wire is well connected to MPEM, check op-
eration of all switches and if everything test good,
the MPEM is defective and must be replaced.
To check engine RPM limitation function, run en-
gine with shifter in forward or reverse position
and check its maximum speed. It should be
around 7000 RPM. Otherwise, the RPM limiter is
defective and the MPEM must be replaced.
If the engine maximum speed does not go over
3500 RPM, the problem might come from the
neutral switch. Refer to MPEM section.
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