Mazda 2006 MX-5 Service Highlights page 116

IGNITION COIL CONSTRUCTION/OPERATION [LF]
Construction
• Direct ignition coils installed directly to each spark plug have been adopted. By adopting direct ignition coils,
high-tension leads have been eliminated in order to simplify the parts of the ignition system, preventing voltage
reduction, and improving the firing efficiency.
• Independent firing control has been adopted to eliminate firing without spark, increasing firing energy.
• The direct ignition coil consists of an ignition coil, ignition coil connector, and boot area, which has the same
function as the current high-tension lead.
• The igniter has been integrated into each ignition coil.
Operation
• The firing timing of the coil is controlled by the PCM for optimum ignition timing control.
IGNITION COIL EXTERNAL VIEW
A
IGNITION COIL
BOOT
Terminal layout
Terminal
Three terminals
End Of Sie
01–18–2
IGNITION SYSTEM
IGNITION
B C
SWITCH
BATTERY
CONDENSER
A
B
C
IGNITION COIL ELECTRICAL SYSTEM WIRING DIAGRAM
PCM
Ignition coil control signal
Ground
Power supply
E5U011818100N01
IGNITION COIL
CYLINDER
B
NUMBER
A
NO.1
C
B
A
NO.2
C
B
A
NO.3
C
B
A
NO.4
C
E5U118ZS5002
Signal