R.M. 2007::2UZ-FE Engine Control System

ES–208

2UZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

DTC

DTC

DTC

P0351 Ignition Coil "A" Primary / Secondary Circuit

P0352 Ignition Coil "B" Primary / Secondary Circuit

P0353 Ignition Coil "C" Primary / Secondary Circuit

ES

DTC

DTC

DTC

DTC

P0354

P0355

P0356

P0357

Ignition Coil "D" Primary / Secondary Circuit

Ignition Coil "E" Primary / Secondary Circuit

Ignition Coil "F" Primary / Secondary Circuit

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.








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.


ECM

IGT1

IGF1

Igniter

No. 1 Ignition Coil with Igniter

From Battery

No. 1 Cylinder

ES–209

Crankshaft Position

Sensor IGT2

IGF2


Ignition Coil

No. 2 Cylinder

ES

IGT3


No. 3 Cylinder

Camshaft Position

Sensor

Other Sensor

(Engine Coolant Temperature

Sensor,

Mass Air Flow Meter, Throttle

Position Sensor, etc.)

IGT4

IGT5

IGT6

IGT7

No. 4 Ignition Coil with Igniter No. 4 Cylinder



No. 6 Cylinder



IGT8

TAC to Tachometer

A117778E04

ES–210

DTC No.

P0351

P0352

P0353

P0354

P0355

P0356

P0357

P0358


DTC Detection Condition Trouble Area

No IGF signal to ECM while engine is running

• Ignition system

• Open or short in IGF or IGT circuit (1 to 8) between ignition coil with igniter and ECM

• No. 1 to No. 8 ignition coil (primary ignition)

• ECM

2 V/DIV.

ES

CH 1

Ground

CH 2

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

Terminals

Equipment Settings

Condition

Contents

CH1: IGT1, IGT2, IGT3, IGT4, IGT5,

IGT6, IGT7, IGT8 - E1

CH2: IGF1, IGF2 - E1

2 V/DIV.

20 msec./DIV.

While the engine is cranking or idling


MONITOR DESCRIPTION

Ignition Coil with Igniter

ECM

IGT

IGF

Igniter

Ignition Coil

ES–211

Ignition Signal (IGT)

Ignition

Confirmation

Signal (IGF)

Normal

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

Related DTCs

Required Sensors/Components (Main)

Required Sensors/Components (Related)

Frequency of Operation

Duration

MIL Operation

Sequence of Operation

P0351: Igniter (cylinder 1) malfunction








Igniter

Crankshaft position sensor

Continuous

0.256 seconds + 4 sparks

Immediate

None

ES

TYPICAL ENABLING CONDITIONS

The monitor will run whenever these DTCs are not present

Either of the following condition is met:

1. Starter

2. Engine RPM

Either of the following condition is met:

None

Condition 1 or 2

OFF

1,500 rpm or less

Condition (a) or (b)

ES–212


(a) All of the following conditions are met:

Engine RPM

Battery voltage

(b) All of the following conditions are met:

Engine RPM

Battery voltage

Number of sparks after CPU is reset

-

500 rpm or less

6 V or more

-

More than 500 rpm

10 V or more

5 sparks or more

TYPICAL MALFUNCTION THRESHOLDS

Ignition signal fail count

Ignition signal fail count

More than 2 times

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


WIRING DIAGRAM

I1 Ignition Coil and

Igniter No. 1

1

2

1

EB1

6

7

2

2

B-Y

7 EA1

B-R

R

B

B-R

IG2

I18

Ignition SW

AM2

AM2

Engine

Room

R/B

Battery

B-R

2

1

W-B

EC

B

B-R

N1

Noise

Filter

(Ignition

No. 1)

N2

Noise

Filter

(Ignition

No. 2)

ER

B-R

2

1

W-B

ED

B-R B-R

W-B

1 3

4 2


Igniter No. 3

R-Y

LG

R-Y

R-Y

W-B

B-R

W-B

1 3

R-W

4 2


Igniter No. 5

W-B

B-R

W-B

1 3

R-W

4 2


Igniter No. 7

W-B

B-R

W-B

1 3

R-Y

4 2


Igniter No. 2

W-B

B-R

1 3

W-B 4 2


Igniter No. 4

R-W

W-B

B-R

W-B

L-Y

1 3

R-Y

4 2


Igniter No. 6

W-B

B-R

W-B

1 3

R-Y

4 2


Igniter No. 8

W-B

W-B

ED

B-R

W-B

1

4

3

2

R-W

L-W

B-L

G-W

R-W

LG-B

R-W

L-Y

G

G-B

ES–213

ECM

8

E4 IGT1

24

E4 IGF1

11

E4 IGT3

13

E4 IGT5

14

E4 IGT7

15

E4 IGT2

25

E4 IGF2

10

E4 IGT4

12

E4 IGT6

9

E4 IGT8

ES

A133712E01

ES–214


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.

ES

1 CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER

(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])

Wire Harness Side

I1

I3

I5

I7

I2

I4

I6

I8

Ignition Coil with Igniter Connector

E4

IGF1

IGF2

ECM Connector

A115891E02

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with igniter connectors.

(b) Disconnect the E4 ECM connector.

(c) Measure the resistance between the wire harness side connectors.

Standard resistance

Specified Condition Tester Connection

Ignition coil (I1-2) - IGF1 (E4-24)








Ignition coil (I1-2) or IGF1 (E4-24) -

Body ground


Body ground


Body ground


Body ground


Body ground


Body ground


Body ground


Body ground

Below 1

Ω

10 k

Ω or higher


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)

E4

IGF2 (+)

IGF1 (+)

ECM Connector

E6

E1 (-)

E118245E24

(a) Disconnect the ignition coil with igniter connectors.

(b) Turn the ignition switch ON.

(c) Measure the voltage of the E4 and E6 ECM connectors.

Standard voltage

Tester Connection

IGF1 (E4-24) - E1 (E6-1)

IGF2 (E4-25) - E1 (E6-1)

Specified Condition

4.5 to 5.5 V

4.5 to 5.5 V


NG REPLACE ECM

ES

OK

REPLACE IGNITION COIL WITH IGNITER

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

Wire Harness Side

I5

I7

I1

I3

I6

I8

I2

I4


IGT2

E4


(b) Disconnect the E4 ECM connector.




IGT (I1-3) - IGT1 (E4-8)

IGT (I2-3) - IGT2 (E4-15)

IGT (I3-3) - IGT3 (E4-11)

IGT (I4-3) - IGT4 (E4-10)

IGT (I5-3) - IGT5 (E4-13)

IGT (I6-3) - IGT6 (E4-12)

IGT (I7-3) - IGT7 (E4-14)

IGT (I8-3) - IGT8 (E4-9)

Below 1

Ω

IGT1

IGT7

IGT5

IGT8

IGT4

IGT3

IGT6

ECM Connector

A115891E03

ES

ES–216


Tester Connection

IGT (I1-3) or IGT1 (E4-8) - Body ground








Specified Condition

10 k

Ω or higher


(e) Reconnect the ECM connector.


CONNECTOR

OK

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

E4

IGT3 (+)

IGT4 (+)

IGT8 (+)

IGT1 (+)

E6

IGT2 (+) IGT5 (+)

IGT6 (+) E1 (-)

(a) Measure the voltage of the E4 and E6 ECM connectors when the engine is cranked.



IGT1 (E4-8) - E1 (E6-1)

IGT2 (E4-15) - E1 (E6-1)

IGT3 (E4-11) - E1 (E6-1)

IGT4 (E4-10) - E1 (E6-1)

IGT5 (E4-13) - E1 (E6-1)

IGT6 (E4-12) - E1 (E6-1)

IGT7 (E4-14) - E1 (E6-1)

IGT8 (E4-9) - E1 (E6-1)

0.1 to 4.5 V

IGT7 (+)

NG

A116425E08

REPLACE ECM

OK

ES–217


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

E4

IGT7 (+)

IGT3 (+)

IGT4 (+)

IGT8 (+)

IGT1 (+)

E6

IGT2 (+) IGT5 (+)

IGT6 (+) E1 (-)

A116425E08


(b) Measure the voltage of the E4 and E6 ECM connectors when the engine is cranked.



IGT1 (E4-8) - E1 (E6-1)

IGT2 (E4-15) - E1 (E6-1)

IGT3 (E4-11) - E1 (E6-1)

IGT4 (E4-10) - E1 (E6-1)

IGT5 (E4-13) - E1 (E6-1)

IGT6 (E4-12) - E1 (E6-1)

IGT7 (E4-14) - E1 (E6-1)

IGT8 (E4-9) - E1 (E6-1)

4.5 V or more

(c) Reconnect the ignition coil with igniter connectors.

NG REPLACE ECM

ES

OK

7 INSPECT IGNITION COIL WITH IGNITER (POWER SOURCE)

Wire Harness Side

I1

I3

I5

I7

I2

I4

I6

I8

+B


A054393E46

(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 and I8 ignition coil with igniter connectors.

(b) Turn the ignition switch ON or START.

(c) Measure the voltage of the wire harness side connector and body ground.



+B (I1-1) - Body ground








9 to 14 V

(d) Reconnect the ignition coil connectors.

OK REPLACE IGNITION COIL

NG

ES–218


ES

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

Wire Harness Side

I1

I3

I5

I7

I2

I4

I6

I8

Ignition Coil with Igniter

I18

Ignition Switch

IG2

A115892E01


(b) Disconnect the I18 ignition switch connector.




Ignition coil (I1-1) - IG2 (I18-6)








Ignition coil (I1-1) or IG2 (I18-6) -

Body ground


Body ground


Body ground


Body ground


Body ground


Body ground


Body ground


Body ground

Below 1

Ω

10 k

Ω or higher

(d) Reconnect the ignition switch connector.

(e) Reconnect the ignition coil with igniter connectors.


CONNECTOR

OK

REPLACE IGNITION COIL

R.M. 2007::2UZ-FE Engine Control System

DTC

DTC

DTC

P0351 Ignition Coil "A" Primary / Secondary Circuit

P0352 Ignition Coil "B" Primary / Secondary Circuit

P0353 Ignition Coil "C" Primary / Secondary Circuit

DTC

DTC

DTC

DTC

P0354

P0355

P0356

P0357

Ignition Coil "D" Primary / Secondary Circuit

Ignition Coil "E" Primary / Secondary Circuit

Ignition Coil "F" Primary / Secondary Circuit

Ignition Coil "G" Primary / Secondary Circuit

DTC P0358 Ignition Coil "H" Primary / Secondary Circuit

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

WIRING DIAGRAM

INSPECTION PROCEDURE

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