CONTROL SYSTEM
01–40–26
ELECTRONIC SPARK ADVANCE (ESA) CONTROL OPERATION [LF]
E5U014000000N33
Ignition Method
• The PCM excites the ignition coils employing either fixed ignition or cycle estimated ignition according to engine
operation conditions.
Ignition
method
Ignition timing Ignition coil energization period
Fixed
ignition
Fixed at BTDC 8 ° Fixed period at BTDC 8 ° to end of energization
Cycle
estimated
ignition
Ignition at timing appropriate to
engine operation conditions
based on input signals
• Energization time (ignition coil energization time) to igniter is determined
according to battery voltage
• Cylinder independent ignition
-180°
No.2
MAXIMUM VALVE TIMING RETARD CONDITION
CRANK ANGLE
FIXD IGNITION CYLINDER No.
No.1 CYLINDER APPROX. BTDC 8 °
CKP SENSOR SIGNAL
CKP SENSOR SIGNAL
CMP SENSOR SIGNAL
CMP SENSOR SIGNAL
FIXD IGNITION CYLINDER No.
No.2No.1 No.3 No.4
No.2 No.2No.1 No.3 No.4
180° 360° 540°0°
MAXIMUM VALVE TIMING ADVANCE CONDITION
E5U140ZT5102
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