Can-Am DS 450 2008, Руководство по ремонту

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Section 06 ELECTRICAL SYSTEM
Subsection 01 (IGNITION SYSTEM)
IGNITION SYSTEM
SERVICE TOOLS
Description Part Number Page
Fluke 115 multimeter ........................................................... 529 035 868 ................. 228, 230, 232, 234
ECM adapter tool.................................................................. 529 036 085 ................................. 231, 233
SERVICE PRODUCTS
Description Part Number Page
Super Lube ........................................................................... 293 550 030 ......................................... 238
heat-sink paste ..................................................................... 420 897 186 ......................................... 237
GENERAL
IGNITION SYSTEM DESCRIPTION
The ignition system of this vehicle has two spark
plugs each connected to its own coil. Both plugs
will fire to ignite the fuel/air mixture in the combus-
tion chamber at the same time to assure a com-
plete burn of the mixture.
If one coil or spark plug fails, the other will not
be affected but the engine will not run smoothly.
However, if a short circuit should occur in the pri-
mary winding circuit, the ignition system will prob-
ably stop functioning completely.
IGNITION SYSTEM OPERATION
The battery supplies 12 Vdc through the main relay
and the injector/ignition fuse to the primary side of
each ignition coil. The ECM completes the circuit
by switching both coils to ground at the right mo-
ment.
As the engine rotates, a signal from the CPS
(crankshaft position sensor) relative to the po-
sition of the piston in the cylinder, is produced
and sent to the ECM. The ECM uses this signal
as well as engine RPM to establish the exact
moment at which the ignition spark is required. It
then provides the ground to the primary winding
of the ignition coils.
With the ground provided by the ECM, current
flows through the primary coil winding which in-
duces a higher current potential in the secondary
winding. This high current potential jumps across
the spark plug gap and ignites the fuel/air mixture
within the cylinder.
Ignition Timing
Ignition timing is not adjustable. Refer to the
ELECTRONIC FUEL INJECTION section for infor-
mation.
TROUBLESHOOTING
IGNITION SYSTEM TESTING
NOTE: It is good practice to check for fault codes
using B.U.D.S. software as a first troubleshoot-
ing step. Refer to
MONITORING SYSTEM/FAULT
CODES
sub section.
The ECM controls the ignition system and can de-
tect an open or short circuit in the ignition coil pri-
mary windings of both coils. However, it cannot
identify the specific coil circuit at fault and does
not monitor the secondary windings.
Ignition Testing Sequence
Set engine stop switch to “RUN”.
Turn the ignition switch to the “ON” position.
No Headlights and Taillight
If the headlights (if selected) and taillight do not
function, the ECM may not be powered. Check
the following in the indicated order:
20 A main fuse
vmr2008-024
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