A00277
Camshaft
Position
Sensor
Crankshaft
Position
Sensor
Various
Sensors
G
NE
TAC
IGT1
IGF
IGT2
Engine
ECU
From Battery
From Battery
Igniter
Igniter
Ignition Coil
Ignition Coil
Spark Plug
No.1 Cylinder
No.4 Cylinder
No.2 Cylinder
No.3 Cylinder
To Tachometer
--
DIAGNOSTICS
ENGINE (2RZ--FE, 3RZ--FE)
DI--151
DTC P1300/14,15 Ignition Circuit Malfunction (Bank 1)
DTC P1310/14,15 Ignition Circuit Malfunction (Bank 2)
CIRCUIT DESCRIPTION
A DIS (Direct Ignition System) has been adopted, The DIS improves the ignition timing accuracy, reduces
high--voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS is a 2--cylinder simultaneous ignition system which ignites 2 cylinders simultaneously with 1 ignition
coil. In the 2--cylinder simultaneous ignition system, each of the 2 spark plugs is connected to the end of the
secondary winding, High voltage generated in the secondary winding is applied directly to the 2 spark plugs.
The sparks of the 2 spark plugs pass simultaneously from the center electrode to the ground electrode.
The engine ECU determines ignition timing and outputs the ignition signals (IGT) for each cylinder. Based
on IGT signals, the power transistors in the igniter cuts off the current to the primary coil in the ignition coil
is supplied simultaneously to the 2 spark plugs via the high--tension cords that are connected to the both
ends of the secondary coil. At the same time, the igniter also sends an ignition confirmation signal (IGF) as
a fail--safe measure to the engine ECU.
DTC No
DTC Detecting Condition
Trouble Area
P1300/14,15
N IGF i
l t
i
ECU hil
i
i
i
S
Open or short in IGF or IGT circuit from ignition coil to engine
ECU.
P1300/14,15
P1310/14,15
No IGF signal to engine ECU while engine is running
ECU.
S
Ignition coil
S
engine ECU
DI1IO--01
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3RZ-F,3RZ-FE