Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 63

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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MONITOR DESCRIPTION

If the ECM does not receive any IGF signals despite transmitting the IGT signal, it interprets this as a fault 
in the igniter and sets a DTC.
If the malfunction is not repaired successfully, a DTC is set 1second after the engine is next started.

MONITOR STRATEGY

Related DTCs

P0351: Igniter (Cylinder 1) malfunction
P0352: Igniter (Cylinder 2) malfunction
P0353: Igniter (Cylinder 3) malfunction
P0354: Igniter (Cylinder 4) malfunction
P0355: Igniter (Cylinder 5) malfunction
P0356: Igniter (Cylinder 6) malfunction

Required Sensors/Components (Main)

Igniter (Cylinder 1 to 6)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

0.256 seconds and 4 sparks

MIL Operation

Immediate

Sequence of Operation

None

Ignition Coil with Igniter

Igniter

Ignition Coil

Ignition Signal 
(IGT)

Ignition 
Confirmation 
Signal (IGF)

Normal

Malfunction

Circuit Open

Time

ECM

IGT

IGF

A115898E01

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1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

Monitor runs whenever following DTCs not present

None

Either of following conditions 1 or 2 met

-

1. Following conditions (a) and (b) met:

-

(a) Engine RPM

500 rpm or less

(b) Battery voltage

6 V or more

2. Following conditions (a) and (b) met:

-

(a) Engine RPM

More than 500 rpm

(b) Battery voltage

10 V or more

(c) Number of sparks after CPU is reset

5 sparks or more

Ignition signal fail count

More than 2 times

Ignition signal fail count is on the right:

When IGF does not return despite sending IGT.

IGF signal

Igniter transmits IGF signal when it receives IGT signal from ECM

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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WIRING DIAGRAM

ECM

IGT1

IGF1

IGT2

IGT3

IGT4

IGT5

IGT6

IG2

AM2

Ignition 
Switch

Noise 
Filter

AM2

Battery

Ignition Coil Assembly 
(with Igniter No. 1)

Ignition Coil Assembly 
(with Igniter No. 6)

7

6

1

2

B8

A1

B7

2

3

4

1

IGF

GND

+B

IGT1

2

3

4

1

IGF

GND

+B

IGT6

2

3

4

1

IGF

GND

+B

IGT5

2

3

4

1

IGF

GND

+B

IGT4

2

3

4

1

IGF

GND

+B

IGT3

2

3

4

1

IGF

GND

+B

IGT2

B24

Ignition Coil Assembly 
(with Igniter No. 5)

B20

Ignition Coil Assembly 
(with Igniter No. 3)

B23 Ignition Coil Assembly 

(with Igniter No. 4)

B5

Ignition Coil Assembly 
(with Igniter No. 2)

B6

8

B1

24
B1

9

B1

10

B1

11

B1

12

B1

13

B1

A133418E01

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1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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INSPECTION PROCEDURE

HINT:
Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when 
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was 
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other 
data, from the time the malfunction occurred.

(a) Check the spark plug and sparks of the misfiring cylinder 

(See page 

IG-3

).

NG

OK

(a) Disconnect the B5, B6, B7, B20, B23 or B24 ignition coil 

with igniter connector.

(b) Disconnect the B1 ECM connector.
(c) Check the resistance.

Standard Resistance (Check for open)

Standard Resistance (Check for short)

(d) Reconnect the ECM connector.
(e) Reconnect the ignition coil with igniter connector.

NG

OK

1

CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER

              Go to step 4

2

CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM (IGF1 SIGNAL 
TERMINAL))

B1

Front View

ECM Connector

Wire Harness Side:

IGF1

IGF

Ignition Coil with Igniter Connector

B5 B6 B7 B20 B23 B24

A116293E05

Tester Connections

Specified Conditions

IGF (B7-2) - IGF1 (B1-24)

Below 1 

Ω

IGF (B24-2) - IGF1 (B1-24)

IGF (B6-2) - IGF1 (B1-24)

IGF (B23-2) - IGF1 (B1-24)

IGF (B5-2) - IGF1 (B1-24)

IGF (B20-2) - IGF1 (B1-24)

Tester Connections

Specified Conditions

IGF (B7-2) or IGF1 (B1-24) - Body ground

10 k

Ω or higher

IGF (B24-2) or IGF1 (B1-24) - Body ground

IGF (B6-2) or IGF1 (B1-24) - Body ground

IGF (B23-2) or IGF1 (B1-24) - Body ground

IGF (B5-2) or IGF1 (B1-24) - Body ground

IGF (B20-2) or IGF1 (B1-24) - Body ground

REPAIR OR REPLACE HARNESS OR 
CONNECTOR