GSIC - Global Service Information Center

### 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

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## DESCRIPTION

HINT:

1. These DTCs indicate malfunctions relating to the primary circuit.
2. IF DTC P0351 is displayed, check the No. 1 ignition coil circuit.
3. IF DTC P0352 is displayed, check the No. 2 ignition coil circuit.
4. IF DTC P0353 is displayed, check the No. 3 ignition coil circuit.
5. IF DTC P0354 is displayed, check the No. 4 ignition coil circuit.
6. IF DTC P0355 is displayed, check the No. 5 ignition coil circuit.
7. IF DTC P0356 is displayed, check the No. 6 ignition coil circuit.

The Direct Ignition System (DIS) improves the ignition timing accuracy, reduces high-voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS is a 1 cylinder ignition system which ignites one cylinder with one ignition coil. In the 1 cylinder ignition system, 1 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. Based on the IGT signal, the power transistors in the igniter cut off the current to the primary coil in the ignition coil is supplied to the spark plug that is connected to the end of the secondary coil. At the same time, the igniter also sends an ignition confirmation signal (IGF) as a fail-safe measure to the ECM.

DTC No. | DTC Detection Condition | Trouble Area

P0351
P0352
P0353
P0354
P0355
P0356

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

1. Ignition system
2. Open or short in IGF or IGT1 to 6 circuit from ignition coil to ECM
3. No. 1 to No. 6 ignition coils
4. ECM

2. Reference: Inspect using the oscilloscope.
3. During cranking or idling, check the waveform between terminals IGT1 to IGT6 and E1, and IGF and E1 of the E15 and E17 ECM connectors.

   Item | Content

   Symbols (Terminal No.)

   IGT1 (E15-8) - E1(E17-1)
   IGT2 (E15-9) - E1(E17-1)
   IGT3 (E15-10) - E1(E17-1)
   IGT4 (E15-11) - E1(E17-1)
   IGT5 (E15-12) - E1(E17-1)
   IGT6 (E15-13) - E1(E17-1)
   IGF1 (E15-24) - E1 (E17-1)

   Tool Setting | 2 V/DIV., 20 msec./DIV.
   Condition | Idling

## WIRING DIAGRAM

## INSPECTION PROCEDURE

HINT:

  Read freeze frame data using the intelligent tester. 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

| NG |

Go to step 4

OK |

2.CHECK WIRE HARNESS (IGNITION COIL ASSEMBLY - ECM (IGF SIGNAL TERMINAL))

1. Disconnect the I7, I8, I9, I10, I11 or I12 ignition coil connector.

1. Disconnect the E15 ECM connector.

1. Measure the resistance of the wire harness side connectors.

   Standard resistance:

     Tester Connection | Specified Condition
     I7-2 (IGF) - E15-24 (IGF1) | Below 1 Ω
     I8-2 (IGF) - E15-24 (IGF1) | Below 1 Ω
     I9-2 (IGF) - E15-24 (IGF1) | Below 1 Ω
     I10-2 (IGF) - E15-24 (IGF1) | Below 1 Ω
     I11-2 (IGF) - E15-24 (IGF1) | Below 1 Ω
     I12-2 (IGF) - E15-24 (IGF1) | Below 1 Ω
     I7-2 (IGF) or E15-24 (IGF1) - Body ground | 10 kΩ or higher
     I8-2 (IGF) or E15-24 (IGF1) - Body ground | 10 kΩ or higher
     I9-2 (IGF) or E15-24 (IGF1) - Body ground | 10 kΩ or higher
     I10-2 (IGF) or E15-24 (IGF1) - Body ground | 10 kΩ or higher
     I11-2 (IGF) or E15-24 (IGF1) - Body ground | 10 kΩ or higher
     I12-2 (IGF) or E15-24 (IGF1) - Body ground | 10 kΩ or higher

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

3.INSPECT ECM (IGF1 VOLTAGE)

1. Disconnect the ignition coil connector.

1. Turn the ignition switch ON.

1. Measure the voltage of the E15 and E17 ECM connectors.

   Standard voltage:

     Tester Connection | Specified Condition
     E15-24 (IGF1) - E17-1 (E1) | 4.5 to 5.5 V

| NG |

REPLACE ECM

OK |

REPLACE IGNITION COIL ASSEMBLY

4.CHECK WIRE HARNESS (IGNITION COIL ASSEMBLY - ECM (IGT SIGNAL TERMINAL))

1. Disconnect the I7, I8, I9, I10, I11 or I12 ignition coil connector.

1. Disconnect the E15 ECM connector.

1. Measure the resistance of the wire harness side connectors.

   Standard resistance:

     Tester Connection | Specified Condition
     I7-3 (IGT1) - E15-8 (IGT1) | Below 1 Ω
     I8-3 (IGT2) - E15-9 (IGT2) | Below 1 Ω
     I9-3 (IGT3) - E15-10 (IGT3) | Below 1 Ω
     I10-3 (IGT4) - E15-11 (IGT4) | Below 1 Ω
     I11-3 (IGT5) - E15-12 (IGT5) | Below 1 Ω
     I12-3 (IGT6) - E15-13 (IGT6) | Below 1 Ω
     I7-3 (IGT1) or E15-8 (IGT1) - Body ground | 10 kΩ or higher
     I8-3 (IGT2) or E15-9 (IGT2) - Body ground | 10 kΩ or higher
     I9-3 (IGT3) or E15-10 (IGT3) - Body ground | 10 kΩ or higher
     I10-3 (IGT4) or E15-11 (IGT4) - Body ground | 10 kΩ or higher
     I11-3 (IGT5) or E15-12 (IGT5) - Body ground | 10 kΩ or higher
     I12-3 (IGT6) or E15-13 (IGT6) - Body ground | 10 kΩ or higher

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

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

1. Measure the voltage of the E15 and E17 ECM connectors when the engine is cranked.

   Standard voltage:

     Tester Connection | Specified Condition
     E15-8 (IGT1) - E17-1 (E1) | 0.1 to 4.5 V
     E15-9 (IGT2) - E17-1 (E1) | 0.1 to 4.5 V
     E15-10 (IGT3) - E17-1 (E1) | 0.1 to 4.5 V
     E15-11 (IGT4) - E17-1 (E1) | 0.1 to 4.5 V
     E15-12 (IGT5) - E17-1 (E1) | 0.1 to 4.5 V
     E15-13 (IGT6) - E17-1 (E1) | 0.1 to 4.5 V

| NG |

REPLACE ECM

OK |

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

1. Disconnect the I7, I8, I9, I10, I11 or I12 ignition coil connector.

1. Measure the voltage of the E15 and E17 ECM connectors when the engine is cranked.

   Standard voltage:

     Tester Connection | Specified Condition
     E15-8 (IGT1) - E17-1 (E1) | 4.5 V or more
     E15-9 (IGT2) - E17-1 (E1) | 4.5 V or more
     E15-10 (IGT3) - E17-1 (E1) | 4.5 V or more
     E15-11 (IGT4) - E17-1 (E1) | 4.5 V or more
     E15-12 (IGT5) - E17-1 (E1) | 4.5 V or more
     E15-13 (IGT6) - E17-1 (E1) | 4.5 V or more

| NG |

REPLACE ECM

OK |

7.INSPECT IGNITION COIL ASSEMBLY (POWER SOURCE)

1. Disconnect the I7, I8, I9, I10, I11 or I12 ignition coil connector.

1. Turn the ignition switch ON.

1. Measure the voltage of the wire harness side connector.

   Standard voltage:

     Tester Connection | Specified Condition
     I7-1 (+B) - Body ground | 9 to 14 V
     I8-1 (+B) - Body ground | 9 to 14 V
     I9-1 (+B) - Body ground | 9 to 14 V
     I10-1 (+B) - Body ground | 9 to 14 V
     I11-1 (+B) - Body ground | 9 to 14 V
     I12-1 (+B) - Body ground | 9 to 14 V

| OK |

REPLACE IGNITION COIL ASSEMBLY

NG |

8.CHECK WIRE HARNESS (IGNITION COIL ASSEMBLY - IGNITION SWITCH)

1. Disconnect the I7, I8, I9, I10, I11 or I12 ignition coil connector.

1. Disconnect the I6 ignition switch connector.

1. Measure the resistance of the wire harness side connectors.

   Standard resistance:

     Tester Connection | Specified Condition
     I7-1 (+B) - I6-6 (IG2) | Below 1 Ω
     I8-1 (+B) - I6-6 (IG2) | Below 1 Ω
     I9-1 (+B) - I6-6 (IG2) | Below 1 Ω
     I10-1 (+B) - I6-6 (IG2) | Below 1 Ω
     I11-1 (+B) - I6-6 (IG2) | Below 1 Ω
     I12-1 (+B) - I6-6 (IG2) | Below 1 Ω
     I7-1 (+B) or I6-6 (IG2) - Body ground | 10 kΩ or higher
     I8-1 (+B) or I6-6 (IG2) - Body ground | 10 kΩ or higher
     I9-1 (+B) or I6-6 (IG2) - Body ground | 10 kΩ or higher
     I10-1 (+B) or I6-6 (IG2) - Body ground | 10 kΩ or higher
     I11-1 (+B) or I6-6 (IG2) - Body ground | 10 kΩ or higher
     I12-1 (+B) or I6-6 (IG2) - Body ground | 10 kΩ or higher

| NG |

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK |

REPLACE IGNITION COIL ASSEMBLY