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DIAGNOSTICS
ENGINE
DI-1 15
269
Author:
Date:
2001 SIENNA (RM787U)
DTC
P1300
Igniter Circuit Malfunction (No.1)
DTC
P1305
Igniter Circuit Malfunction (No.2)
DTC
P1310
Igniter Circuit Malfunction (No.3)
DTC
P1315
Igniter Circuit Malfunction (No.4)
DTC
P1320
Igniter Circuit Malfunction (No.5)
DTC
P1325
Igniter Circuit Malfunction (No.6)
CIRCUIT DESCRIPTION
A Direct Ignition System (DIS) has been adopted. The DIS improves the ignition timing accuracy, reduces
high-voltage loss, and enhances the the overall reliability of the ignition system by eliminating the distributor.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder
ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated
in the secondary winding is applied directly to the spark plug. The spark of the spark plug pass from the center
elecrtode to the ground electrode.
The ECM 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
to the spark plug that are connected to the end of the secondary coil. At the same time, the igniter also sends
an ignition confirmation signal (IGF) as a fail-safe measure to the ECM.
DTC No.
DTC Detecting Condition
Trouble Area
P1300
P1305
P1310
P1315
P1320
P1325
Condition (a) is repeated 3 times consecutively during 6 con-
secutively IGT signals while engine is running
(a) IGF signal is not input to ECM for 2 or more ignitions
Ignition system
Open or short in IGF or IGT circuit from ignition coil with ignit-
er
Ignition coil with igniter
ECM
DI8B4-01
