Toyota Tundra. Manual — part 1199

Fig. 129: Ignition System Circuit Diagram

DTC TROUBLE DETECTION CONDITION CHART

DTC

No.

DTC Detection Condition

Trouble Area

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 and ECM



No. 1 to No. 6 ignition coils



ECM

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 130: Identifying Waveform

Reference: Inspection using an oscilloscope.

While cranking or idling the engine, check the waveform between terminals IGT (1 to 6) and E1, and IGF1 and
E1 of the ECM connector.

WAVEFORM REFERENCE

MONITOR DESCRIPTION

Fig. 131: Ignition System Block Diagram

Item

Content

Terminal

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

CH2: IGF1 - E1

Equipment Setting

2 V/DIV. 20 msec./DIV.

Condition

Cranking or idling

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

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 1 second after the engine is next started.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

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

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

About 1 second

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Either of following conditions A or B met

-

A. Engine RPM

1500 RPM or less

B. Starter

OFF

Either of following conditions C or D met

-

C. Both of following conditions (a) and (b) met

-

(a) Engine speed

500 RPM or less

(b) Battery voltage

6 V or more

D. All of following conditions (a), (b) and (c) met

-

(a) Engine speed

More than 500 RPM

(b) Battery voltage

10 V or more

(c) Number of sparks after CPU 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

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Fig. 132: Ignition System Wiring Diagram

INSPECTION PROCEDURE

IGF signal

Igniter transmits IGF signal when it receives IGT signal from ECM

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra