Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 62

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–203

ES

(a) Check the teeth of the signal plate.

OK:

Sensor plate teeth do not have any cracks or 
deformation.

NG

OK

NEXT

(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Clear DTCs (See page 

ES-38

).

(e) Start the engine.
(f)

Select the following menu items: DIAGNOSIS / 
ENHANCED OBD II / DTC INFO / PENDING CODES.

(g) Read DTCs.

Result

HINT:
If the engine does not start, replace the ECM.

B

A

6

CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH PLATE)

REPLACE CAMSHAFT TIMING GEAR 
ASSEMBLY

7

REPLACE VVT SENSOR

8

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343, P0345, P0347 
AND/OR P0348)

Display (DTC Output)

Proceed To

No output

A

P0340, P0342, P0343, P0345, P0347 and/or P0348

B

REPLACE ECM (See page 

ES-446

)

END

ES–204

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

HINT:
•

These DTCs indicate malfunctions relating to the primary circuit.

•

If DTC P0351 is set, check No. 1 ignition coil with igniter circuit.

•

If DTC P0352 is set, check No. 2 ignition coil with igniter circuit.

•

If DTC P0353 is set, check No. 3 ignition coil with igniter circuit.

•

If DTC P0354 is set, check No. 4 ignition coil with igniter circuit.

•

If DTC P0355 is set, check No. 5 ignition coil with igniter circuit.

•

If DTC P0356 is set, check No. 6 ignition coil with igniter circuit.

DESCRIPTION

A Direct Ignition System (DIS) is used on this vehicle.
The DIS is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil and one spark 
plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary 
wiring, is applied directly to each spark plug. The sparks of the spark plugs pass from the center 
electrodes to the ground electrodes.
The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Using the 
IGT signal, the ECM turns the power transistor inside the igniter on and off. The power transistor, in turn, 
switches on and off the current to the primary coil. When the current to the primary coil is cut off, a 
powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing 
them to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back 
an ignition confirmation (IGF) signal to the ECM, for each cylinder ignition.

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

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–205

ES

Crankshaft Position Sensor

VVT Sensor

Various Sensors

TACH

ECM

Igniter

No. 1 Ignition Coil

No. 2 Ignition Coil

No. 3 Ignition Coil

No. 4 Ignition Coil

No. 5 Ignition Coil

No. 6 Ignition Coil

Ignition Coil

No. 1 Cylinder

No. 2 Cylinder

No. 3 Cylinder

No. 4 Cylinder

No. 5 Cylinder

No. 6 Cylinder

Spark Plug

From Battery

IGT1

IGF1

IGT2

IGT3

IGT4

IGT5

IGT6

To Tachometer

A122501E01

ES–206

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

Reference: Inspection using an oscilloscope
While cranking or idling, check the waveform between terminals IGT(1 to 6) and E1, and IGF1 and E1 of 
the ECM connector.

DTC No.

DTC Detection Conditions

Trouble Areas

P0351
P0352
P0353
P0354
P0355
P0356

No IGF signal to ECM while engine running (1 trip 
detection logic)

•

Ignition system

•

Open or short in IGF1 or IGT circuit (1 to 6) between ignition coil 
with igniter and ECM

•

No. 1 to No. 6 ignition coils with igniters

•

ECM

Items

Contents

Terminals

CH1: IGT1, IGT2, IGT3, IGT4, IGT5, IGT6 - E1

CH2: IGF1 - E1

Equipment Settings

2 V/Division, 20 ms/Division

Conditions

Cranking or idling

CH 1

CH 2

GND

GND

IGT and IGF Signal Waveform

2V/ 
Division

20 msec./Division

A031764E02