ES–208 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

DTC P0351 Ignition Coil "A" Primary / Secondary Circuit

DTC P0352 Ignition Coil "B" Primary / Secondary Circuit

DTC P0353 Ignition Coil "C" Primary / Secondary Circuit

DTC P0354 Ignition Coil "D" Primary / Secondary Circuit

DTC P0355 Ignition Coil "E" Primary / Secondary Circuit

DTC P0356 Ignition Coil "F" Primary / Secondary Circuit

ES
DTC P0357 Ignition Coil "G" Primary / Secondary Circuit

DTC P0358 Ignition Coil "H" Primary / Secondary Circuit

DESCRIPTION
HINT:
• These DTCs indicate a malfunction related to a primary circuit.
• If DTC P0351 is displayed, check No. 1 ignition coil circuit.
• If DTC P0352 is displayed, check No. 2 ignition coil circuit.
• If DTC P0353 is displayed, check No. 3 ignition coil circuit.
• If DTC P0354 is displayed, check No. 4 ignition coil circuit.
• If DTC P0355 is displayed, check No. 5 ignition coil circuit.
• If DTC P0356 is displayed, check No. 6 ignition coil circuit.
• If DTC P0357 is displayed, check No. 7 ignition coil circuit.
• If DTC P0358 is displayed, check No. 8 ignition coil circuit.
A Direct Ignition System (DIS) is used on this vehicle.
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
IGTs, the ECM turns the power transistor inside the igniter on/off, which switches on/off current to the
primary coil. When 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 current to
the primary coil, the igniter sends back ignition confirmation signals (IGFs) for each cylinder ignition to the
ECM.
 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–209

No. 1 Ignition Coil with Igniter

From Battery
ECM Igniter

IGT1 No. 1 Cylinder

IGF1

Ignition Coil
Crankshaft Position
No. 2 Ignition Coil
Sensor IGT2
with Igniter No. 2 Cylinder
IGF2

No. 3 Ignition Coil

ES
IGT3 with Igniter No. 3 Cylinder

No. 4 Ignition Coil

IGT4
with Igniter No. 4 Cylinder
Camshaft Position
Sensor

No. 5 Ignition Coil

IGT5 with Igniter No. 5 Cylinder

No. 6 Ignition Coil

IGT6 with Igniter No. 6 Cylinder

Other Sensor
(Engine Coolant Temperature
No. 7 Ignition Coil
Sensor, IGT7 with Igniter No. 7 Cylinder
Mass Air Flow Meter, Throttle
Position Sensor, etc.)

IGT8 No. 8 Ignition Coil

with Igniter No. 8 Cylinder

TAC

to Tachometer

A117778E04
 ES–210 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

DTC No. DTC Detection Condition Trouble Area

P0351
P0352
• Ignition system
P0353
• Open or short in IGF or IGT circuit (1 to 8) between
P0354
No IGF signal to ECM while engine is running ignition coil with igniter and ECM
P0355
• No. 1 to No. 8 ignition coil (primary ignition)
P0356
• ECM
P0357
P0358

2 V/DIV.

CH 1
Ground

CH 2
ES Ground

20 msec./DIV.
A093278E13

Reference: Inspect using an oscilloscope.

While cranking or idling the engine, check the waveform between terminals IGT1 to IGT8 and E1, and
IGF1 to IGF2 and E1 of the E6, E8 and E6 ECM connectors.
Items Contents
CH1: IGT1, IGT2, IGT3, IGT4, IGT5,
Terminals IGT6, IGT7, IGT8 - E1
CH2: IGF1, IGF2 - E1
2 V/DIV.
Equipment Settings
20 msec./DIV.
Condition While the engine is cranking or idling
 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–211

MONITOR DESCRIPTION

Ignition Coil with Igniter

IGT
Ignition Coil
Igniter
ECM IGF

Ignition Signal (IGT) ES

Normal
Ignition
Confirmation
Signal (IGF) Open

Open

Time

A082388E19

If the ECM does not receive an IGF after sending an IGT, it interprets this as a fault in the igniter and sets
a DTC.

MONITOR STRATEGY
P0351: Igniter (cylinder 1) malfunction
P0352: Igniter (cylinder 2) malfunction
P0353: Igniter (cylinder 3) malfunction
P0354: Igniter (cylinder 4) malfunction
Related DTCs
P0355: Igniter (cylinder 5) malfunction
P0356: Igniter (cylinder 6) malfunction
P0357: Igniter (cylinder 7) malfunction
P0358: Igniter (cylinder 8) malfunction
Required Sensors/Components (Main) Igniter
Required Sensors/Components (Related) Crankshaft position sensor
Frequency of Operation Continuous
Duration 0.256 seconds + 4 sparks
MIL Operation Immediate
Sequence of Operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever these DTCs are not present None
Either of the following condition is met: Condition 1 or 2
1. Starter OFF
2. Engine RPM 1,500 rpm or less
Either of the following condition is met: Condition (a) or (b)
 ES–212 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

(a) All of the following conditions are met: -

Engine RPM 500 rpm or less
Battery voltage 6 V or more
(b) All of the following conditions are met: -
Engine RPM More than 500 rpm
Battery voltage 10 V or more
Number of sparks after CPU is reset 5 sparks or more

TYPICAL MALFUNCTION THRESHOLDS

Ignition signal fail count More than 2 times
Ignition signal fail count When IGF does not return despite sending IGT

ES COMPONENT OPERATING RANGE

IGF signal Igniter outputs IGF signal when it receives IGT signal from ECM
 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–213

WIRING DIAGRAM
I1 Ignition Coil and
Igniter No. 1 ECM
8
B-R B-R B-R B-R LG
E4 IGT1
1 3
24
R-Y R-Y
E4 IGF1
W-B 4 2
1 EB1 I3 Ignition Coil and
W-B
Igniter No. 3 R-Y
11
B-R B-R L-W
E4 IGT3
B-Y 1 3 R-W
W-B 4 2
I5 Ignition Coil and

W-B
Igniter No. 5
ES
13
7 EA1 N1 B-R B-L
Noise E4 IGT5
2 1 3 R-W
Filter B-R
(Ignition W-B 4 2
No. 1) I7 Ignition Coil and
B-R Igniter No. 7
W-B
14
1 B-R G-W
6 IG2 E4 IGT7
1 3 R-Y
I18 W-B 4 2
Ignition SW I2 Ignition Coil and R-W
Igniter No. 2
W-B 15
AM2 B-R LG-B
7 E4 IGT2
1 3
25
R R-W R-W
E4 IGF2
W-B 4 2
I4 Ignition Coil and
N2 Igniter No. 4
Noise W-B
Filter 2
2 Engine 10
Room (Ignition B-R L-Y L-Y
2 No. 2) E4 IGT4
R/B 1 3 R-Y
AM2 W-B 4 2
I6 Ignition Coil and
1 Igniter No. 6
1
W-B
2 12
B-R G
E4 IGT6
1 3 R-Y
W-B W-B W-B 4 2
B I8 Ignition Coil and
Igniter No. 8
W-B
9
B-R G-B
E4 IGT8
B 1 3 R-W
Battery W-B W-B 4 2
EC ER ED ED

A133712E01
 ES–214 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

INSPECTION PROCEDURE
HINT:
• Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame
data can be helpful in determining whether the vehicle was running or stopped, whether the engine
was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the
time of a malfunction.
• If DTCs P0351, P0354, P0356 and P0357 are output simultaneously, IGF1 circuit may be open or
short.
• If DTCs P0352, P0353, P0355 and P0358 are output simultaneously, IGF2 circuit may be open or
short.

1 CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER

ES (a) Check the spark plug and spark of misfiring cylinder (See
page IG-1).
NG Go to step 4

OK

2 CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM [IGF SIGNAL TERMINAL])

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil
Wire Harness Side with igniter connectors.
(b) Disconnect the E4 ECM connector.
(c) Measure the resistance between the wire harness side
I1 I2
connectors.
I3 I4 Standard resistance
I5 I6 Tester Connection Specified Condition
I7 I8 Ignition coil (I1-2) - IGF1 (E4-24)
Ignition coil (I2-2) - IGF2 (E4-25)
Ignition Coil with Igniter Connector
Ignition coil (I3-2) - IGF2 (E4-25)
Ignition coil (I4-2) - IGF1 (E4-24)
E4 Below 1 Ω
Ignition coil (I5-2) - IGF2 (E4-25)
Ignition coil (I6-2) - IGF1 (E4-24)
Ignition coil (I7-2) - IGF1 (E4-24)
Ignition coil (I8-2) - IGF2 (E4-25)
Ignition coil (I1-2) or IGF1 (E4-24) -
Body ground
IGF1
Ignition coil (I2-2) or IGF2 (E4-25) -
IGF2 Body ground
ECM Connector
Ignition coil (I3-2) or IGF2 (E4-25) -
A115891E02
Body ground
Ignition coil (I4-2) or IGF1 (E4-24) -
Body ground
10 kΩ or higher
Ignition coil (I5-2) or IGF2 (E4-25) -
Body ground
Ignition coil (I6-2) or IGF1 (E4-24) -
Body ground
Ignition coil (I7-2) or IGF1 (E4-24) -
Body ground
Ignition coil (I8-2) or IGF2 (E4-25) -
Body ground
 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–215

(d) Reconnect the ignition coil with igniter connectors.

(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

3 INSPECT ECM (IGF1 AND IGF2 VOLTAGE)

(a) Disconnect the ignition coil with igniter connectors.

ECM Connector (b) Turn the ignition switch ON.
(c) Measure the voltage of the E4 and E6 ECM connectors.
E4 E6
Standard voltage
Tester Connection
IGF1 (E4-24) - E1 (E6-1)
Specified Condition
4.5 to 5.5 V
ES
IGF2 (E4-25) - E1 (E6-1) 4.5 to 5.5 V

IGF1 (+) E1 (-) (d) Reconnect the ignition coil with igniter connectors.
IGF2 (+)
E118245E24
NG REPLACE ECM

OK

REPLACE IGNITION COIL WITH IGNITER

4 CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM [IGT SIGNAL TERMINAL])

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil
Wire Harness Side with igniter connectors.
(b) Disconnect the E4 ECM connector.
(c) Measure the resistance between the wire harness side
I1 I2
connectors.
I3 I4 Standard resistance
I5 I6 Tester Connection Specified Condition
I7 I8 IGT (I1-3) - IGT1 (E4-8)
IGT (I2-3) - IGT2 (E4-15)
Ignition Coil with Igniter Connector
IGT (I3-3) - IGT3 (E4-11)
IGT (I4-3) - IGT4 (E4-10)
E4 Below 1 Ω
IGT (I5-3) - IGT5 (E4-13)
IGT (I6-3) - IGT6 (E4-12)
IGT (I7-3) - IGT7 (E4-14)
IGT (I8-3) - IGT8 (E4-9)
IGT2
IGT1

IGT8
IGT4
IGT7 IGT3 ECM Connector
IGT5 IGT6
A115891E03
 ES–216 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

Tester Connection Specified Condition

IGT (I1-3) or IGT1 (E4-8) - Body
ground
IGT (I2-3) or IGT2 (E4-15) - Body
ground
IGT (I3-3) or IGT3 (E4-11) - Body
ground
IGT (I4-3) or IGT4 (E4-10) - Body
ground
10 kΩ or higher
IGT (I5-3) or IGT5 (E4-13) - Body
ground
IGT (I6-3) or IGT6 (E4-12) - Body
ground
IGT (I7-3) or IGT7 (E4-14) - Body
ground
IGT (I8-3) or IGT8 (E4-9) - Body
ES ground

(d) Reconnect the ignition coil with igniter connectors.

(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

5 INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 OR IGT8 VOLTAGE)

(a) Measure the voltage of the E4 and E6 ECM connectors

IGT3 (+) IGT4 (+) when the engine is cranked.
Standard voltage
IGT8 (+)
Tester Connection Specified Condition
IGT1 (+)
IGT1 (E4-8) - E1 (E6-1)
E4 E6 IGT2 (E4-15) - E1 (E6-1)
IGT3 (E4-11) - E1 (E6-1)
IGT4 (E4-10) - E1 (E6-1)
0.1 to 4.5 V
IGT5 (E4-13) - E1 (E6-1)
IGT6 (E4-12) - E1 (E6-1)

IGT2 (+) IGT5 (+) IGT6 (+) E1 (-) IGT7 (E4-14) - E1 (E6-1)
IGT8 (E4-9) - E1 (E6-1)

IGT7 (+) NG REPLACE ECM

A116425E08

OK
 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–217

6 INSPECT ECM (IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 OR IGT8 VOLTAGE)

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil
IGT3 (+) IGT4 (+) with igniter connectors.
(b) Measure the voltage of the E4 and E6 ECM connectors
IGT8 (+)
when the engine is cranked.
IGT1 (+) Standard voltage
E4 E6 Tester Connection Specified Condition
IGT1 (E4-8) - E1 (E6-1)
IGT2 (E4-15) - E1 (E6-1)
IGT3 (E4-11) - E1 (E6-1)
IGT4 (E4-10) - E1 (E6-1)
4.5 V or more
IGT2 (+) IGT5 (+) IGT6 (+) E1 (-) IGT5 (E4-13) - E1 (E6-1)
IGT6 (E4-12) - E1 (E6-1)
ES
IGT7 (E4-14) - E1 (E6-1)
IGT7 (+) IGT8 (E4-9) - E1 (E6-1)
A116425E08

(c) Reconnect the ignition coil with igniter connectors.

NG REPLACE ECM

OK

7 INSPECT IGNITION COIL WITH IGNITER (POWER SOURCE)

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil
Wire Harness Side with igniter connectors.
(b) Turn the ignition switch ON or START.
I1 I2 (c) Measure the voltage of the wire harness side connector
I3 I4 and body ground.
Standard voltage
I5 I6
Tester Connection Specified Condition
I7 I8 +B +B (I1-1) - Body ground
Ignition Coil with Igniter Connector +B (I2-1) - Body ground
A054393E46
+B (I3-1) - Body ground
+B (I4-1) - Body ground
9 to 14 V
+B (I5-1) - Body ground
+B (I6-1) - Body ground
+B (I7-1) - Body ground
+B (I8-1) - Body ground

(d) Reconnect the ignition coil connectors.

OK REPLACE IGNITION COIL

NG
 ES–218 2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

8 CHECK HARNESS AND CONNECTOR (IGNITION COIL - IGNITION SWITCH)

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil
Wire Harness Side with igniter connectors.
(b) Disconnect the I18 ignition switch connector.
I1 I2 (c) Measure the resistance between the wire harness side
I3 I4
connectors.
Standard resistance
I5 I6
Tester Connection Specified Condition
I7 I8 Ignition coil (I1-1) - IG2 (I18-6)

Ignition Coil with Igniter Ignition coil (I2-1) - IG2 (I18-6)

Ignition coil (I3-1) - IG2 (I18-6)
Ignition coil (I4-1) - IG2 (I18-6)
ES Ignition coil (I5-1) - IG2 (I18-6)
Below 1 Ω

I18 Ignition coil (I6-1) - IG2 (I18-6)

Ignition coil (I7-1) - IG2 (I18-6)
Ignition coil (I8-1) - IG2 (I18-6)
Ignition coil (I1-1) or IG2 (I18-6) -
Body ground
Ignition coil (I2-1) or IG2 (I18-6) -
Ignition Switch IG2 Body ground
Ignition coil (I3-1) or IG2 (I18-6) -
A115892E01
Body ground
Ignition coil (I4-1) or IG2 (I18-6) -
Body ground
10 kΩ or higher
Ignition coil (I5-1) or IG2 (I18-6) -
Body ground
Ignition coil (I6-1) or IG2 (I18-6) -
Body ground
Ignition coil (I7-1) or IG2 (I18-6) -
Body ground
Ignition coil (I8-1) or IG2 (I18-6) -
Body ground

(d) Reconnect the ignition switch connector.

(e) Reconnect the ignition coil with igniter connectors.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

REPLACE IGNITION COIL