Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 01 (OVERVIEW)
NOTE:
The EGTS, CTS and OPS sensors do not
provide control inputs to the ECM. Their sole pur-
pose is to protect the engine components by emit-
ting a warning signal in the event of overheating or
low oil pressure.
Ignition System
The ignition system is a digital inductive type.
The ECM controls the ignition system param-
eters, such as spark timing, duration and firing
order to achieve the proper engine requirements.
Ignition Coils
Three separate ignition coils induce voltage to a
high level in the secondary windings to produce a
spark at the spark plug.
The ignition coils receive input from the ECM.
Each coil provides high voltage to its correspond-
ing spark plug.
This ignition system allows spark plugs to spark
independently.
All three ignition coils are located on the cylinder
head directly on the spark plugs.
1
R1503motr213A
TYPICAL
1. Ignition coils
Ignition Timing
The ECM is programmed with data (it contains ig-
nition mappings) for optimum ignition timing un-
der all operating conditions. Using engine operat-
ing conditions provided by the sensors, the ECM
controls the ignition timing for optimum engine op-
eration. No adjustment of the ignition timing is re-
quired.
Knock Sensor
A knock sensor is mounted on the engine block
behind the air intake manifold. It detects specific
vibration that would be typically generated by en-
gine detonation. If detonation occurs, the knock
sensor detects it and the ECM retards the ignition
advance temporarily (it goes in a specific mode)
until detonation stops. The ECM is able to evalu-
ate the knocking cylinder and modifies the ignition
advance just on the detonating one.
Engine Modes of Operation
The ECM controls different operation modes of
the engine to allow proper operation for all possi-
ble conditions: Cranking, start-up, idle, warm up,
part load, full load, Sea-Doo LK™ (learning key, lim-
ited vehicle speed), engine speed limiter, drowned
engine and limp home (see below).
Flooded Engine (drowned mode)
If engine is fuel-flooded and does not start, this
special mode can be activated to prevent fuel in-
jection and ignition while cranking. Proceed as fol-
lows to activate it.
With safety lanyard on its post while engine is
stopped, press and HOLD throttle lever.
Press the start/stop button. The mode is now on.
Releasing throttle lever will bring back to its nor-
mal mode.
If engine does not start, it may be necessary to re-
move spark plugs and crank engine with rags over
spark plug holes. Refer to COMPONENT INSPEC-
TION AND ADJUSTMENT subsection.
WARNING
When disconnecting coil from spark plug, al-
ways disconnect coil from main harness first.
Never check for engine ignition spark from
an open coil and/or spark plug in the engine
compartment as spark may cause fuel vapor
to ignite.
If engine is water-flooded, refer to WATER
FLOODED ENGINE in MAINTENANCE section.
400
smr2004-Complete Line Up
www.SeaDooManuals.net
Содержание 2006 GTI
Страница 1: ...Smr 2004 ang FH8 Thu Jun 03 14 42 10 2004 Page 1 www SeaDooManuals net ...
Страница 183: ...Section 04 ENGINE 2 STROKE Subsection 06 ROTARY VALVE F01D73W 159 smr2004 Complete Line Up 161 www SeaDooManuals net ...
Страница 795: ...F17Z03 www SeaDooManuals net ...
Страница 796: ...F17Z05 www SeaDooManuals net ...
Страница 797: ...F17Z04 www SeaDooManuals net ...
Страница 798: ...F17Z06 www SeaDooManuals net ...
Страница 799: ...F08Z03 www SeaDooManuals net ...
Страница 800: ...F18Z1A www SeaDooManuals net ...
Страница 801: ...Smr 2004 ang FH8 Thu Jun 03 14 42 10 2004 Page 1 www SeaDooManuals net ...