Ignition System; Ignition Coil Construction/Operation; Construction; Operation - Mazda RX-8 2004 Service Highlights

IGNITION COIL CONSTRUCTION/OPERATION

Construction

• Distributorless ignition coils have been adopted, and two ignition coils are installed each on both the trailing
and leading sides. By adopting the distributorless ignition coil, the distributor has been eliminated in order to
simplify the parts of the ignition system, and also to prevent voltage reduction occurring between the parts
improving firing efficiency.
• Independent firing control has been adopted to eliminate firing without spark, increasing firing energy.

Operation

• The firing timing of the coil is controlled by the PCM by means of a built-in igniter for optimum ignition timing
control.
IGNITON COIL
FRONT VIEW
B
C
A
IGNITION COIL INTERNAL CIRCUIT
C
A
B
Terminal layout
Terminal
3 terminals
End Of Sie
01–18–2

IGNITION SYSTEM

IGNITION COIL
SIDE VIEW
TO SPARK PLUG
SECONDARY
TERMINAL
A
B
C
IGNITION COIL
ELECTRICAL SYSTEM WIRING DIAGRAM
PCM
2Z 2AA 2AC 2AD
IG SW
BATTERY
Signal
Ignition coil control signal
Ground
Ignition coil power supply
CHU011801008S03
A
IG CONDENSER
T/F
C
B
A
T/R
C
B
A
L/F
C
B
A
L/R
C
A
CHU0118S004