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05-541

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

05EXE-05

DTC

P0351

IGNITION COIL "A" PRIMARY/SECONDARY CIRCUIT IGNITION COIL "B" PRIMARY/SECONDARY CIRCUIT IGNITION COIL "C" PRIMARY/SECONDARY CIRCUIT IGNITION COIL "D" PRIMARY/SECONDARY CIRCUIT IGNITION COIL "E" PRIMARY/SECONDARY CIRCUIT IGNITION COIL "F" PRIMARY/SECONDARY CIRCUIT

DTC

P0352

DTC

P0353

DTC

P0354

DTC

P0355

DTC

HINT:

S S S S S S S

P0356

These DTCs indicate a malfunction related to primary circuit. If DTC P0351 is displayed, check No. 1 ignition coil with igniter If DTC P0352 is displayed, check No. 2 ignition coil with igniter If DTC P0353 is displayed, check No. 3 ignition coil with igniter If DTC P0354 is displayed, check No. 4 ignition coil with igniter If DTC P0355 is displayed, check No. 5 ignition coil with igniter If DTC P0356 is displayed, check No. 6 ignition coil with igniter

circuit. circuit. circuit. circuit. circuit. circuit.

CIRCUIT DESCRIPTION

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 IGT, the ECM turns on and off the power transistor inside the igniter, which switches on and 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 the current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder ignition to the ECM.

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

731

05-542

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

ECM

Igniter

From Battery

IGT1 IGF1 Crankshaft Position Sensor

Ignition Coil

No.1 Ignition Coil with Igniter

No. 1 Cylinder

Spark Plug

IGT2

No. 2 Ignition Coil with Igniter

No. 2 Cylinder

IGT3 VVT Sensor IGT4

No. 3 Ignition Coil with Igniter

No. 3 Cylinder

No. 4 Ignition Coil with Igniter

No. 4 Cylinder

Other Sensors S ECT Sensor S MAF Meter S Throttle Position Sensor S Others

IGT5

No. 5 Ignition Coil with Igniter

No. 5 Cylinder

IGT6 TACH To Tachometer

No. 6 Ignition Coil with Igniter

No. 6 Cylinder

A82677

DTC No. P0351 P0352 P0353 P0354 P0355 P0356

DTC Detection Condition

Trouble Area S Ignition system S Open or short in IGF1 and IGT circuits (1 through 6) from ignition coil assy to ECM S Ignition coil assy (No. 1 through No. 6) S ECM

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

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

732

05-543

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

MONITOR DESCRIPTION

Ignition Coil with Igniter

IGT ECM IGF Igniter

Ignition Coil

Ignition Signal (IGT) Ignition Confirmation Signal (IGF) Normal Malfunction Circuit Open time

A82388

If the ECM does not receive the IGF after sending the 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 P0355: Igniter (Cylinder 5) malfunction P0356: Igniter (Cylinder 6) malfunction Igniter CKP sensor Continuous 0.256 seconds + 6 sparks Immediate None

Related DTCs

Required sensors / components (Main) Required sensors / components (Related) Frequency of operation Duration MIL operation Sequence operation

TYPICAL ENABLING CONDITIONS

The monitor will run whenever these DTCs are not present Either of the following conditions is met: 1. Engine RPM 2. Starter See page 05-377 Condition 1 or 2 1,500 rpm or less OFF

TYPICAL MALFUNCTION THRESHOLDS

IGF signal 2005 HIGHLANDER REPAIR MANUAL (RM1144U) ECM does not detect IGF signal from igniter when ECM sends IGT signal to igniter

Author :

Date :

733

05-544

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

COMPONENT OPERATING RANGE

IGF signal Igniter outputs IGF signal when it receives IGT signal from ECM

WIRING DIAGRAM

ECM I15 Ignition Switch R 1 W-B IC1 1 GR

I3 Ignition Coil Assy No. 2 I2 Ignition Coil Assy No. 1

7 AM2 Y

IG2 6

+B

IGT

R-L 3

W-R W-R

8 E7 4 S29

W-R

IGT1 IGF1

4

GND IGF

2 W-R

4 S28

24 E7

Short Connector P 3

W-R

Instrument Panel J/B Assy 1 1C 6 1F IG2 R

R 1 W-B 4

I4

+B

IGT

9 E7

IGT2

GND IGF

2 W-R

W-B

Ignition Coil Assy No. 3

R 1 O R

I5

+B

IGT

Y-B 3

W-R

10 E7

IGT3

1 1G 4 1C B L-Y

W-B 4

GND IGF

2 W-R L-Y 3

W-R

W-B 1 IC3

Ignition Coil Assy No. 4

R 1 W-B 4

I6

+B

IGT

11 E7

IGT4

10 F7 FL Block Assy BR R W-B 2 EB1 W BR FL Main N1 Noise Filter Battery R AM2

GND IGF

2 W-R G-Y 3

W-R

Ignition Coil Assy No. 5

1

R 1 W-B 4

I7

+B

IGT

12 E7

IGT5

GND IGF

2 W-R L-R 3 A 2 J7 J/C A BR ED BR 13 E7 1 IGT6 E9 E1

W-B R R 1 EC

Ignition Coil Assy No. 6

R 1 W-B 4 W-B

+B

IGT

GND IGF

A88694

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

734

05-545

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

1

CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER (See page 18-9 )

OK: Spark occurs. NG Go to step 4

OK

2

CHECK WIRE HARNESS (IGNITION COIL ASSY - ECM (IGF1 TERMINAL)

(a) (b) (c) Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors. Disconnect the E7 ECM connector. Check the resistance of the wire harness side connectors. Standard:

Tester Connection I2-2 I3-2 I4-2 I5-2 I6-2 I7-2 I2-2 I3-2 I4-2 I5-2 I6-2 I7-2 or or or or or or E7-24 E7-24 E7-24 E7-24 E7-24 E7-24 (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) (IGF1) Body Body Body Body Body Body ground ground ground ground ground ground Specified Condition

Wire Harness Side

I2 I3 I4 I5 I6 I7 Ignition Coil

Below 1

E7 ECM

E7-24 E7-24 E7-24 E7-24 E7-24 E7-24

10 k or higher

IGF1

Y A54393 A81699 A85848

NG

REPAIR OR CONNECTOR

REPLACE

HARNESS

AND

OK

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

735

05-546

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

3

CHECK ECM (IGF VOLTAGE)

(a)

E1 (-)

IGF1 (+)

(b) (c)

Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors. Turn the ignition switch ON. Measure the voltage between the terminals of the ECM connectors. Standard:

Tester Connection Specified Condition 4.5 to 5.5 V E7-24 (IGF1) - E9-1 (E1)

E7 ECM

E9 ECM

A76903

HINT: Reference: Inspection using the oscilloscope. During cranking or idling, check the waveform of the ECM connectors.

Tester Connection Specified Condition Correct waveform is as shown

IGF 1 E7 ECM E9 ECM

E7-24 (IGF1) - E9-1 (E1)

E1 (-)

IGF Signal Waveform 2 V/ Division

CH2 GND 20 msec./Division

A88572

NG

REPLACE ECM (See page 10-24 )

OK REPLACE IGNITION COIL ASSY

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

736

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DIAGNOSTICS SFI SYSTEM (3MZ-FE)

4

CHECK WIRE HARNESS (IGNITION COIL ASSY - ECM (IGT TERMINAL))

(a) Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors. Disconnect the E7 ECM connector. Check the resistance of the wire harness side connectors. Standard:

Tester Connection I2-3 - E7-8 (IGT1) I3-3 - E7-9 (IGT2) I4-3 - E7-10 (IGT3) I5-3 - E7-11 (IGT4) I6-3 - E7-12 (IGT5) I7-3 - E7-13 (IGT6) I2-3 or E7-8 (IGT1) - Body ground I3-3 or E7-9 (IGT2) - Body ground I4-3 or E7-10 (IGT3) - Body ground I5-3 or E7-1 (1IGT4) - Body ground I6-3 or E7-12 (IGT5) - Body ground I7-3 or E7-13 (IGT6) - Body ground Specified Condition

Wire Harness Side

I2 I3 I4 I5 I6 I7 Ignition Coil

(b) (c)

Below 1

E7 ECM

10 k or higher

IGT6 IGT5

Y A54393 A81699

IGT1 IGT2 IGT3 IGT4

A85848

NG

REPAIR OR CONNECTOR

REPLACE

HARNESS

AND

OK

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

737

05-548

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

5

CHECK ECM (IGT1, IGT2, IGT3, IGT4, IGT5 OR IGT6 VOLTAGE)

(a) Check the voltage of the ECM connectors when the engine is cranked. Standard:

Tester Connection E7-8 (GT1) - E9-1 (E1) E7-9 (IGT2) - E9-1 (E1) E7-10 (IGT3) - E9-1 (E1) E7-1 1 (IGT4) - E9-1 (E1) E7-12 (IGT5) - E9-1 (E1) E7-13 (IGT6) - E9-1 (E1) Specified Condition

IGT5 (+) IGT3 (+) IGT 6 (+) IGT4 (+) IGT1 (+) IGT2 (+)

E1 (-) E7 ECM E9 ECM

A76903

More than 0.1 V or less than 4.5 V

IGT5 (+)

IGT3 (+) IGT2 (+) IGT1 (+)

(b) (c)

IGT 6 (+) IGT4 (+)

Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors. Check the voltage of the ECM connectors when the engine is cranked. Standard:

Tester Connection Specified Condition E7-8 (IGT1) - E9-1 (E1) E7-9 (IGT2) - E9-1 (E1) E7-10 (IGT3) - E9-1 (E1) E7-1 1 (IGT4) - E9-1 (E1) E7-12 (IGT5) - E9-1 (E1) E7-13 (IGT6) - E9-1 (E1)

E1 (-) E7 ECM E9 ECM

A76903

4.5 V or more

IGT5 (+)

IGT3 (+) IGT2 (+) IGT1 (+)

IGT 6 (+) IGT4 (+)

HINT: Reference: Inspection using the oscilloscope. During cranking or idling, check the waveform of the ECM connectors.

Tester Connection Specified Condition E7-8 (GT1) - E9-1 (E1) E7-9 (IGT2) - E9-1 (E1) E7-10 (IGT3) - E9-1 (E1) E7-1 1 (IGT4) - E9-1 (E1) E7-12 (IGT5) - E9-1 (E1) E7-13 (IGT6) - E9-1 (E1)

E1 (-) E7 ECM E9 ECM

Correct waveform is as shown

IGT Signal Waveform 2 V/ Division CH1 GND

20 msec./Division

A88572

NG

REPLACE ECM

OK

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

738

05-549

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

6

INSPECT IGNITION COIL ASSY (POWER SOURCE)

(a) (b) (c) Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors. Turn the ignition switch ON. Check the voltage of the wire harness side connector. Standard:

Tester Connection I2-1 I3-1 I4-1 I5-1 I6-1 I7-1 Body Body Body Body Body Body ground ground ground ground ground ground Specified Condition

Wire Harness Side

I2 I3 I4 I5 I6 I7 Ignition Coil

A54393

9 to 14 V

OK NG

REPLACE IGNITION COIL ASSY

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

739

05-550

DIAGNOSTICS SFI SYSTEM (3MZ-FE)

7

CHECK WIRE HARNESS (IGNITION COIL ASSY - IGNITION SWITCH)

(a) Check the IG2 fuse. (1) Remove the IG2 fuse from the instrument panel J/B assy. (2) Check for resistance of the IG2 fuse. Standard: Below 1 Disconnect the I2, I3, I4, I5, I6 and I7 ignition coil connectors. Disconnect the II5 ignition switch connector. Check the resistance of the wire harness side connectors. Standard:

Tester Connection I2-1 I3-1 I4-1 I5-1 I6-1 I7-1 I2-1 I3-1 I4-1 I5-1 I6-1 I7-1 or or or or or or I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 I15-6 (IG2) (IG2) (IG2) (IG2) (IG2) (IG2) Body Body Body Body Body Body ground ground ground ground ground ground Specified Condition

Wire Harness Side Instrument Panel J/B Assy IG2 Fuse

(b) (c) (d)

I2 I3 I4 I5 I6 I7 Ignition Coil

Below 1

I15 Ignition Switch

(IG2) (IG2) (IG2) (IG2) (IG2) (IG2)

10 k or higher

1 5

2 6

3 7

4 8

IG2

A92540

NG

REPAIR OR CONNECTOR

REPLACE

HARNESS

AND

OK REPLACE IGNITION COIL ASSY

2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Author :

Date :

740

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