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DI-1 13
DIAGNOSTICS - ENGINE
DI6VI-04
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)
CIRCUIT DESCRIPTION
A DIS (Direct Ignition System) 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
S Ignition system
P1300
S Open or short in IGF1 and IGT1 - 4 circuit from
P1305
No IGF signal to ECM while engine is running ignition coil with igniter
P1310
S No.1 - No.4 ignition coil with igniter
P1315
S ECM
2002 ECHO (RM884U)
Author : Date : 283
DI-1 14
DIAGNOSTICS - ENGINE
WIRING DIAGRAM
I10 Instrument Panel
Instrument Panel
Ignition J/B
J/B
Switch
7 1 6 3 B-R 11
W-R B-R ECM
1A 1O 1O 1A EB1
5 AM2 IG2 6
5V
W-R B-R B-R
B-R
1
I2 22
G-R
B-R Ignition Coil E7
3 IGT1
1 and Igniter 3
Y Y
No. 1 E7
2 IGF
2 Engine B-R 4 W-B
Y
AM2 Room 1
R/B No. 1 I3 21
G-B E7 IGT2
1 Ignition Coil 3
B-R and Igniter
1 No. 2 2
Y
B-R 4 W-B
Y
1 20
B-R I4 G-O
B-L Ignition Coil E7 IGT3
3 Y
and Igniter
No. 3
2
F6 2 4 W-B
B-R
Fusible Link 1
MAIN I5 19
Block G-Y
Ignition Coil E7 IGT4
3
1 and Igniter Y
N1 No. 4
Noise 2
Filter 4 W-B
W-B
Battery
EB
A09059
2002 ECHO (RM884U)
Author : Date : 284
DI-1 15
DIAGNOSTICS - ENGINE
INSPECTION PROCEDURE
HINT:
S If DTC P1300 is displayed, check No.1 ignition coil with igniter circuit.
S If DTC P1305 is displayed, check No.2 ignition coil with igniter circuit.
S If DTC P1310 is displayed, check No.3 ignition coil with igniter circuit.
S If DTC P1315 is displayed, check No.4 ignition coil with igniter circuit.
S Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel
ratio lean or rich, etc. at the time of the malfunction.
1 Check spark plug and spark (See page DI-63 ).
NG Go to step 4.
OK
2 Check for open and short in harness and connector in IGF and IGT signal circuit
between ECM and ignition coil with igniter (See page IN-29 ).
NG Repair or replace harness or connector.
OK
3 Disconnect ignition coil with igniter connector and check voltage between
terminals IGF of ECM connector and body ground.
ON IGF PREPARATION:
(a) Remove the connector cover from the ECM.
(b) Disconnect the ignition coil with igniter connector.
(c) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals IGF of the ECM connector
(+) (-) and body ground.
OK:
A09043 Voltage: 4.5 - 5.5 V
OK Replace ignition coil with igniter.
NG
2002 ECHO (RM884U)
Author : Date : 285
DI-1 16
DIAGNOSTICS - ENGINE
Check and replace ECM (See page IN-29 ).
4 Check for open and short in harness and connector in IGT signal circuit between
ECM and ignition coil with igniter (See page IN-29 ).
NG Repair or replace harness or connector.
OK
5 Check voltage between terminals IGT1 - 4 of ECM connector and body ground.
PREPARATION:
ON
IGT1 IGT2 IGT3 IGT4 Remove the connector cover from the ECM.
CHECK:
Measure voltage between terminals IGT1 - 4 of the ECM con-
nector and body ground when engine is cranked.
OK:
(+) (-) Voltage: More than 0.1 V and less than 4.5 V
A09044
IGT signal waveform Reference: INSPECTION USING OSCILLOSCOPE
5 V/
Division During cranking or idling, check waveform between terminals
IGT1 - 4 and E1 of the ECM connector.
IGT HINT:
GND Correct waveform appears as sohwn, with rectangle waves.
GND
IGF
NG Check and replace ECM (See page IN-29 ).
20 m sec./ Division A06097
OK
2002 ECHO (RM884U)
Author : Date : 286
DI-1 17
DIAGNOSTICS - ENGINE
6 Disconnect ignition coil with igniter connector and check voltage between termi-
nals IGT1 - 4 of ECM connector and body ground.
PREPARATION:
ON
IGT1 IGT2 IGT3 IGT4 (a) Remove the connector cover from the ECM.
(b) Disconnect the ignition coil with igniter connector.
CHECK:
Measure voltage between terminals IGT1 - 4 of the ECM con-
nector and body ground when engine is cranked.
(+) (-) OK:
Voltage: More than 0.1 V and less than 4.5 V
A09044
NG Check and replace ECM (See page IN-29 ).
OK
7 Check ignition coil with igniter power source circuit.
PREPARATION:
1 Disconnect the ignition coil with igniter connector.
CHECK:
Measure voltage between terminal 1 of ignition coil with igniter
ON connector and body ground, when ignition switch is turned to
(+) (-) "ON" and "START" position.
START OK:
Voltage: 9 - 14 V
A09045
NG Repair ignition coil with igniter power source-
circuit.
OK
8 Check for open and short in harness and connector between ignition switch and
ignition coil with igniter (See page IN-29 ).
NG Repair or replace harness or connector.
OK
2002 ECHO (RM884U)
Author : Date : 287
DI-1 18
DIAGNOSTICS - ENGINE
9 Check EFI main relay (Marking: EFI) (See page SF-47 ).
NG Replace EFI main relay (marking: EFI).
OK
Replace ignition coil with igniter.
2002 ECHO (RM884U)
Author : Date : 288
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