Ignition System Circuit - Toyota Supra 1990 Manual

IG-4
7M-GE
Fusible Link
Battery
7M-GTE
T
I
~
Fusible Link
IGNITION SYSTEM - Ignition System Circuit
IGNITION SYSTEM CIRCUIT
Ignition Switch
Ignition Coil
AM2
~~I~G~2~
____________________
~
AM230A
~
r(f[::>-------,
Oistri butor
MAIN 2.0L
Igniter
To Tachometer
Spark Plug
rr-----------~
i
0
0
1
Gl G2 G8 NE IGTIGF
Engine ECU
Ignition Switch
To Tachometer
Spark Plug
----+---1
G 1 I G F
~--(
)----T--t---'
I
f
~
MAIN 2.0L
Engine
ECU
~I§~~
~I~
-
I
L -_ _ _
T-~G2 IGT~-~
Igniter
Batter y _:_
0
NE
IGOA
I
L::
N(~
-= __
'--+-+---I
I GOB
Ignition Coil
l
ELECTRONIC SPARK ADVANCE (ESA)
IG1018
F4045
The ECU is programmed with data for optimum ignition tim-
ing under any and all operating conditions. Using data
provided by sensors which monitor various engine func-
tions (rpm, intake air volume, eng. temperature, etc.) the
microcomputer (ECU) triggers the spark at precisely the
right instant.