Emission Control (Aux. Emission Control Devices)
IGNITION CONTROL SYSTEM
EC-10
6. Ignition Control System
! The ignition system is controlled by the ECM.
The ECM monitors the operating condition of the engine using the signals from the sensors and
switches shown below and determines the ignition timing most appropriate for each engine oper-
ating condition. Then it sends a signal to the ignitor, commanding generation of a spark at that
timing.
! The ECM uses a preprogrammed map for a “closed-loop” control which provides its ignition tim-
ing control with excellent transient characteristics, i.e., highly responsive ignition timing control.
(1) Battery (6) Intake air temperature and pressure sensor
(2) Ignition switch (7) Engine coolant temperature sensor
(3) ECM (8) Spark plug
(4) Camshaft position sensor (9) Ignition coil and ignitor assembly
(5) Knock sensor (10) Crankshaft position sensor
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
B2H3536D
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