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DI-216
DIAGNOSTICS - ENGINE (1GR-FE)
DIDTN-01
DTC P0351 Igniter Coil "A" Primary/Secondary Circuit
DTC P0352 Igniter Coil "B" Primary/Secondary Circuit
DTC P0353 Igniter Coil "C" Primary/Secondary Circuit
DTC P0354 Igniter Coil "D" Primary/Secondary Circuit
DTC P0355 Igniter Coil "E" Primary/Secondary Circuit
DTC P0356 Igniter Coil "F" Primary/Secondary Circuit
HINT:
S These DTCs indicate a malfunction related to primary circuit.
S If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.
S If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.
S If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.
S If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.
S If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.
S If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.
DI-217
DIAGNOSTICS - ENGINE (1GR-FE)
CIRCUIT DESCRIPTION
These DTCs indicate a malfunction related to primary circuit.
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 passes from the
center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition signals (IGTs) for each cylinder. Using the
IGT, the ECM turns on and off the power transistor inside the igniter and this switches on and off the current
to the primary coil. When the current to the primary coil is cut off, high-voltage is generated in the secondary
coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the ECM cuts the
current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder igni-
tion to the ECM.
ECM
From Battery
Igniter
IGT1 No.1 Ignition Coil with Igniter
No.1 Cylinder
IGF1
Crankshaft Spark Plug
Ignition Coil
Position
Sensor
IGT2 No.2 Ignition No.2 Cylinder
Coil with Igniter
IGT3 No.3 Ignition No.3 Cylinder
Camshaft Coil with Igniter
Position
Sensor
IGT4 No.4 Ignition No.4 Cylinder
Coil with Igniter
IGT5 No.5 Ignition No.5 Cylinder
Various Coil with Igniter
Sensor
IGT6 No.6 Ignition No.6 Cylinder
Coil with Igniter
TAC
To Tachometer
A23462
DI-218
DIAGNOSTICS - ENGINE (1GR-FE)
DTC No. DTC Detecting Condition Trouble Area
P0351
S Open or short in IGF1 and IGT1 to IGT6 circuit from ignition
P0352
coil with igniter to ECM
P0353
No IGF1 signal to ECM while engine is running S No. 1 to No. 6 ignition coil with igniter (primary ignition)
P0354
S Ignition system
P0355
S ECM
P0356
IGT and IGF Signal Waveform Reference: Inspection using the oscilloscope.
2V/ During cranking or idling, check the waveform between termi-
Division nals IG1 to IG6 and E1, and terminal IGF1 and E1 of the E5 and
CH1 E7 ECM connectors.
GND
CH2
GND
20 msec./Division A23561
MONITOR DESCRIPTION
Ignition Coil with Igniter
IGT
Ignition Coil
ECM Igniter
IGF
Ignition signal
(IGT)
Ignition Normal
confirmation
signal (IGF1) Malfunction
Circuit Open
Time
A20793
If the ECM does not receive the IGF1 after sending the IGT it interprets this as a fault in the igniter and sets
a DTC.
DI-219
DIAGNOSTICS - ENGINE (1GR-FE)
MONITOR STRATEGY
P0351 No. 1 ignition coil with igniter circuit malfunction
P0352 No. 2 ignition coil with igniter circuit malfunction
P0353 No. 3 ignition coil with igniter circuit malfunction
Related DTC
R l t d DTCs
P0354 No. 4 ignition coil with igniter circuit malfunction
P0355 No. 5 ignition coil with igniter circuit malfunction
P0356 No. 6 ignition coil with igniter circuit malfunction
Required sensors/components Igniter
Frequency of operation Continuous
Duration 0.256 sec. + 4 sparks
MIL operation Immediate
Sequence of operation None
TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever these
See page DI-18
DTCs are not present
Engine speed - 1,500 rpm
Either of the following conditions is met: Condition 1 or 2
1. Following conditions are met: Condition (a) and (b)
(a) Engine speed - 500 rpm
(b) Battery voltage 6V -
2. Following conditions are met: Condition (a) and (b)
(a) Engine speed 500 rpm -
(b) Battery voltage 10 V -
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria Threshold
"Ignition signal fail count" More than 2
"Ignition signal fail count" is on the right: When IGF does not return despite sending IGT.
COMPONENT OPERATING RANGE
Standard Value
Confirmed signal number = ignition signal number
DI-220
DIAGNOSTICS - ENGINE (1GR-FE)
WIRING DIAGRAM
ECM
I3 Ignition Coil Assy
(with igniter No. 1)
5 8 IGT1
B-R B-R B-R B-L
IE1 E7
1 3
B-R 24
W-B B-Y B-Y IGF1
E7
4 2
7 1J B-R
I4 Ignition Coil Assy
Driver
(with igniter No. 2)
Side 9 IGT2
J/B B-R L-W
E7
1 3
4 1I B-R
W-B B-Y
4 2
B-R B-R
I5 Ignition Coil Assy
6 (with igniter No. 3)
IG2 I23 10 IGT3
B-R LG E7
Ignition 1 3
AM2 Switch
7 W-B B-Y
W-R 4 2
1 B-R
N1 I6 Ignition Coil Assy
8 IA9 Noise (with igniter No. 4)
Filter 11 IGT4
W-R B-R V
2 E7
1 3
2
W-B B-Y
4 2
B-R
2 I7 Ignition Coil Assy
Engine
AM2 Room (with igniter No. 5)
R/B 12 IGT5
B-R L-B
1 E7
1 3
W-B
2 W-B B-Y
4 2
B-R
I8 Ignition Coil Assy B-Y
(with igniter No. 6)
B 13 IGT6
R-W
1 E7
3
W-B W-B
4 2
Battery W-B
EV
A23571
DI-221
DIAGNOSTICS - ENGINE (1GR-FE)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.
1 Check spark plug and spark (See page IG-1).
NG Go to step 4.
OK
2 Check for open and short in harness and connector in IGF signal circuits be-
tween ECM and ignition coil with igniter.
PREPARATION:
Wire Harness Side:
(a) Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil will igniter
connector.
I3 I4 (b) Disconnect the E7 ECM connector.
I5 I6 CHECK:
I7 I8 Check the resistance between the wire harness side connec-
tors.
Ignition Coil with Igniter Connector OK:
A21025 Standard:
Tester Connection Specified Condition
E7 Ignition coil (I3-2) - IGF1 (E7-24) Below 1
Ignition coil (I4-2) - IGF1 (E7-24) Below 1
Ignition coil (I5-2) - IGF1 (E7-24) Below 1
Ignition coil (I6-2) - IGF1 (E7-24) Below 1
Ignition coil (I7-2) - IGF1 (E7-24) Below 1
Ignition coil (I8-2) - IGF1 (E7-24) Below 1
IGF1 Ignition coil (I3-2) or IGF1 (E7-24) -
10 k or higher
Body ground
ECM Connector B17412
Ignition coil (I4-2) or IGF1 (E7-24) -
10 k or higher
Body ground
Ignition coil (I5-2) or IGF1 (E7-24) -
10 k or higher
Body ground
Ignition coil (I6-2) or IGF1 (E7-24) -
10 k or higher
Body ground
Ignition coil (I7-2) or IGF1 (E7-24) -
10 k or higher
Body ground
Ignition coil (I8-2) or IGF1 (E7-24) -
10 k or higher
Body ground
DI-222
DIAGNOSTICS - ENGINE (1GR-FE)
NG Repair or replace harness or connector.
OK
3 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGF1 and E1 of ECM connector.
PREPARATION:
(a) Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil with igniter
E7 E5 connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between the E8 and E6 ECM connectors.
OK:
IGF1 (+) E1 (-) Standard:
B17411 Tester Connection Specified Condition
IGF1 (E7-24) - E1 (E5-1) 4.5 to 5.5 V
NG Replace ECM (See page SF-66).
OK
Replace ignition coil with igniter.
DI-223
DIAGNOSTICS - ENGINE (1GR-FE)
4 Check for open and short in harness and connector in IGT signal circuit between
ECM and ignition coil with igniter.
Wire Harness Side: PREPARATION:
(a) Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil connector.
(b) Disconnect the E7 ECM connector.
I3 I4
CHECK:
I5 I6 Check the resistance between the wire harness side connec-
I7 I8 tors.
OK:
Ignition Coil with Igniter Connector
Standard:
A21025 Tester Connection Specified Condition
Ignition coil (I3-3) - IGT1 (E7-8) Below 1
E7 Ignition coil (I4-3) - IGT2 (E7-9) Below 1
Ignition coil (I5-3) - IGT3 (E7-10) Below 1
Ignition coil (I6-3) - IGT4 (E7-11) Below 1
Ignition coil (I7-3) - IGT5 (E7-12) Below 1
IGT1 Ignition coil (I8-3) - IGT6 (E7-13) Below 1
IGT2 Ignition coil (I3-3) or IGT1 (E7-8) -
10 k or higher
IGT3 Body ground
IGT4 ECM Connector Ignition coil (I4-3) or IGT2 (E7-9) -
IGT6 IGT5 B17412 10 k or higher
Body ground
Ignition coil (I5-3) or IGT3 (E7-10) -
10 k or higher
Body ground
Ignition coil (I6-3) or IGT4 (E7-11) -
10 k or higher
Body ground
Ignition coil (I7-3) or IGT5 (E7-12) -
10 k or higher
Body ground
Ignition coil (I8-3) or IGT6 (E7-13) -
10 k or higher
Body ground
NG Repair or replace harness or connector.
OK
DI-224
DIAGNOSTICS - ENGINE (1GR-FE)
5 Check voltage between terminals IGT1 to IGT6 and E1 of ECM connector.
PREPARATION:
IGT4 (+)
IGT3 (+)
Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil with igniter con-
IGT5(+) IGT2(+) E1(-)
IGT1(+) nector.
CHECK:
Measure the voltage between terminals the E5 and E7 ECM
connectors when the engine is cranked.
IGT6(+)
OK:
Standard:
E7 E5
B17411 Tester Connection Specified Condition
IGT1 (E7-8) - E1 (E5-1)
IGT2 (E7-9) - E1 (E5-1)
IGT3 (E7-10) - E1 (E5-1)
M
More th 0 1 V or l
than 0.1 less th 4 5 V
than 4.5
IGT4 (E7-11) - E1 (E5-1)
IGT5 (E7-12) - E1 (E5-1)
IGT6 (E7-13) - E1 (E5-1)
NG Replace ECM (See page SF-66).
OK
DI-225
DIAGNOSTICS - ENGINE (1GR-FE)
6 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGT1 to IGT6 and E1 of ECM connector.
PREPARATION:
IGT4 (+)
IGT3 (+)
(a) Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil with igniter
IGT5(+) IGT2(+) E1(-)
IGT1(+) connector.
(b) Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminals the E5 and E7 ECM
IGT6(+)
connectors when the engine is cranked.
OK:
E7 E5 Standard:
B17411
Tester Connection Specified Condition
IGT1 (E7-8) - E1 (E5-1) 4.5 V or more
IGT2 (E7-9) - E1 (E5-1) 4.5 V or more
IGT3 (E7-10) - E1 (E5-1) 4.5 V or more
IGT4 (E7-11) - E1 (E5-1) 4.5 V or more
IGT5 (E7-12) - E1 (E5-1) 4.5 V or more
IGT6 (E7-13) - E1 (E5-1) 4.5 V or more
NG Replace ECM (See page SF-66).
OK
DI-226
DIAGNOSTICS - ENGINE (1GR-FE)
7 Check ignition coil with igniter power source circuit.
Wire Harness Side:
PREPARATION:
(a) Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil with igniter
connector.
I3 I4 (b) Turn the ignition switch to ON.
I5 I6 CHECK:
I7 I8 Measure the voltage between the terminal of the wire harness
side connector and body ground.
Ignition Coil with
Igniter Connector OK:
A21025 Standard:
Tester Connection Specified Condition
I3-1 - Body ground 9 to 14 V
I4-1 - Body ground 9 to 14 V
I5-1 - Body ground 9 to 14 V
I6-1 - Body ground 9 to 14 V
I7-1 - Body ground 9 to 14 V
I8-1 - Body ground 9 to 14 V
OK Repair ignition coil with igniter.
NG
DI-227
DIAGNOSTICS - ENGINE (1GR-FE)
8 Check for open and short in harness and connector between ignition switch and
ignition coil with igniter.
Wire Harness Side:
PREPARATION:
(a) Disconnect the I3, I4, I5, I6, I7 or I8 ignition coil with igniter
connector.
I3 I4 (b) Disconnect the I23 ignition switch connector.
I5 I6 CHECK:
I7 I8 Measure the resistance between the wire harness side connec-
tors.
Ignition Coil with Igniter
OK:
A21025 Standard:
Tester Connection Specified Condition
Wire Harness Side: Ignition coil (I3-1) - IG2 (I23-6) Below 1
I23 Ignition coil (I4-1) - IG2 (I23-6) Below 1
Ignition coil (I5-1) - IG2 (I23-6) Below 1
Ignition coil (I6-1) - IG2 (I23-6) Below 1
Ignition coil (I7-1) - IG2 (I23-6) Below 1
Ignition coil (I8-1) - IG2 (I23-6) Below 1
Ignition coil (I3-1) or IG2 (I23-6) -
IG2 10 k or higher
Ignition Switch Body ground
A21378
Ignition coil (I4-1) or IG2 (I23-6) -
10 k or higher
Body ground
Ignition coil (I5-1) or IG2 (I23-6) -
10 k or higher
Body ground
Ignition coil (I6-1) or IG2 (I23-6) -
10 k or higher
Body ground
Ignition coil (I7-1) or IG2 (I23-6) -
10 k or higher
Body ground
Ignition coil (I8-1) or IG2 (I23-6) -
10 k or higher
Body ground
NG Repair or replace harness or connector.
OK
Replace ignition coil with igniter.
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