Sea-doo GTX Limited iS 255 2009, Shop Manual

Page: 313 / 555

Section 05 ELECTRICAL SYSTEM
Subsection 03 (IGNITION SYSTEM)
ENGINE WILL NOT START (ENGINE
TURNS OVER)
1. Fouled or defective spark plug
- Replace.
2. Defective CPS
- Check operation of CPS and replace if necessary.
Refer to ELECTRONIC FUEL INJECTION section.
3. Defective trigger wheel
- Check. Refer to PTO HOUSING/MAGNETO.
4. Defective ignition circuit
- Check.
ENGINE HARD TO START
1. Spark plug faulty, fouled or worn out
- Check spark plug condition. Replace if necessary.
ENGINE MISFIRES, RUNS IRREGULARLY
1. Fouled, defective, worn spark plugs
- Check/verify heat range/gap/replace.
2. Defective T.O.P.S. sensor
- Check. Refer to LUBRICATION.
3. Damaged trigger wheel/loose CPS
- Check. Refer to PTO HOUSING/MAGNETO.
4. Defective ignition circuit
- Check ignition coil, and wiring condition.
5. Poor engine grounds
- Check/clean/repair.
ENGINE CONTINUALLY BACKFIRES
1. Fouled, defective spark plugs
- Clean/replace.
2. Damaged trigger wheel/defective or loose CPS
- Check, refer to ELECTRONIC FUEL INJECTION.
ENGINE DETONATION OR PINGING
1. Knock sensor disconnected or faulty
- Check, refer to ELECTRONIC FUEL INJECTION.
ENGINE LACKS ACCELERATION OR
POWER
1. Weak spark
- Check/replace spark plugs.
IGNITION SYSTEM TESTING
NOTE: It is a good practice to check for fault
codes using B.U.D.S. software as a first trou-
bleshooting step. Refer to
COMMUNICATION
TOOLS AND B.U.D.S. SOFTWARE subsection.
If a primary winding of an ignition coil or a circuit
is at fault, a fault code will be set. Refer to
MON-
ITORING SYSTEM AND FAULT CODES subsec-
tion.
Ignition System Testing Sequence
Ensure fuses 7, 8 and 9 (in fuse box #1) are good.
If a fuse is burnt, test for a short circuit or faulty
component on that fuse circuit before replacing
the fuse.
WARNING
Due to the possibility of flammable vapors ac-
cumulating in the bilge, you should always
test for a short circuit which may produce a
spark and ignite the vapors before replacing
a burnt fuse.
If one cylinder is not firing and there is no fault
code, replace each spark plug with a known good
spark plug until the faulty plug is located.
If the fault is not found, carry out an IGNITION
COIL QUICK TEST USING B.U.D.S.
PROCEDURES
IGNITION COILS
WARNING
Never check for engine ignition spark from
an open coil and/or spark plug in the engine
compartment as a spark may cause fuel va-
pors which may have accumulated in the
bilge to ignite.
Ignition Coil Test Using B.U.D.S.
Open seat.
Remove rear ventilation box. Refer to AIR INTAKE
SYSTEM .
Connect to the latest applicable B.U.D.S. soft-
ware. Refer to
COMMUNICATION TOOLS AND
B.U.D.S. SOFTWARE section.
In B.U.D.S., select the Activation tab and the
ECM tab.
Energize the desired ignition coil by selecting it on
the engine illustration.
290
smr2009-032