Section07ELECTRICALSYSTEM
Subsection 01 (IGNITION SYSTEM)
GENERAL
Prior to troubleshooting any ignition problems, ver-
ify for any fault codes from the engine manage-
ment system. Refer to ENGINE MANAGEMENT
for more details.
Magneto
The magneto is the primary source of electrical
energy. It transforms magnetic field into electric
current (AC).
smr2005-057-011_a
Unregulated AC current is produced by the mag-
neto. This AC current is rectified and regulated by
the charging system. The resulting regulated DC
is used to charge the battery.
Battery
The battery supplies the VCM and ECM with DC
current.
Crankshaft Position Sensor
The CPS is an inductive speed sensor located on
the magneto housing and is working in conjunc-
tion with a trigger wheel.
F07H0CA
1
1. Crankshaft position sensor (CPS)
An AC voltage is generated by the sensor and is
sent to the ECM to calculate the crankshaft posi-
tion and the engine speed.
For troubleshooting the CPS, refer to ENGINE
MANAGEMENT.
Engine Control Module (ECM)
The ECM controls the ignition system.
1
R1503motr215A
1. ECM
With the input from the sensors of the engine
management system, the ECM determines the
proper ignition timing of the engine. When it is
time to trigger the ignition coil, the ECM com-
pletes the ignition coil primary circuit to the
ground, to produce a spark.
154 smr2005-057
To Next Page
Loading...
Need help?
General
