SFI SYSTEM (w/o EGR System), Diagnostic DTC:P0351, P0352, P0353, P0354

DTC Code DTC Name
P0351 Ignition Coil "A" Primary / Secondary Circuit
P0352 Ignition Coil "B" Primary / Secondary Circuit
P0353 Ignition Coil "C" Primary / Secondary Circuit
P0354 Ignition Coil "D" Primary / Secondary Circuit

DESCRIPTION

Tech Tips


  • These DTCs indicate malfunctions relating to the primary circuit.

  • If DTC P0351 is output, check the No. 1 ignition coil assembly circuit.

  • If DTC P0352 is output, check the No. 2 ignition coil assembly circuit.

  • If DTC P0353 is output, check the No. 3 ignition coil assembly circuit.

  • If DTC P0354 is output, check the No. 4 ignition coil assembly circuit.

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 assembly 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 spark of the spark plugs passes from the center electrode 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 the current supplied to the primary coil on and off. 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.

A01JB0VE14
DTC No. DTC Detection Conditions Trouble Areas

P0351

P0352

P0353

P0354

No IGF signal to ECM while engine running

(1 trip detection logic)

  • Ignition system

  • Open or short in IGF or IGT circuit (1 to 4) between ignition coil assembly and ECM

  • No. 1 to No. 4 ignition coil assemblies

  • ECM

Tech Tips


  • The correct waveform is as shown.


  • While idling the engine, check the waveform between terminals IGT (1 to 4) and E1, and IGF1 and E1 of the ECM connector.

ECM Terminal Name

CH1: Between IGT (1 to 4) and E1

CH2: Between IGF1 and E1
Tester Range 2 V/DIV., 20 ms./DIV.
Condition Idling

WIRING DIAGRAM

A01JB8DE09
A01JC7QE10

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL ASSEMBLY)


    1. A01J964E37
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Ignition Coil Assembly)

      Disconnect the ignition coil assembly connectors.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      D23-1 (+B) - D23-4 (GND) Power switch on (IG) 11 to 14 V
      D22-1 (+B) - D22-4 (GND) Power switch on (IG) 11 to 14 V
      D21-1 (+B) - D21-4 (GND) Power switch on (IG) 11 to 14 V
      D20-1 (+B) - D20-4 (GND) Power switch on (IG) 11 to 14 V

    4. Reconnect the ignition coil assembly connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - IG2 RELAY)

    OK

  2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)


    1. Disconnect the ignition coil assembly connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D23-4 (GND) - Body ground Always Below 1 Ω
      D22-4 (GND) - Body ground Always Below 1 Ω
      D21-4 (GND) - Body ground Always Below 1 Ω
      D20-4 (GND) - Body ground Always Below 1 Ω

    3. Reconnect the ignition coil assembly connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)

    OK

  3. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)


    1. Disconnect the ignition coil assembly connectors.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D23-2 (IGF) - D28-23 (IGF1) Always Below 1 Ω
      D22-2 (IGF) - D28-23 (IGF1) Always Below 1 Ω
      D21-2 (IGF) - D28-23 (IGF1) Always Below 1 Ω
      D20-2 (IGF) - D28-23 (IGF1) Always Below 1 Ω
      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      D23-3 (IGT1) - D28-108 (IGT1) Always Below 1 Ω
      D22-3 (IGT2) - D28-107 (IGT2) Always Below 1 Ω
      D21-3 (IGT3) - D28-106 (IGT3) Always Below 1 Ω
      D20-3 (IGT4) - D28-105 (IGT4) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D23-2 (IGF) or D28-23 (IGF1) - Body ground Always 10 kΩ or higher
      D22-2 (IGF) or D28-23 (IGF1) - Body ground Always 10 kΩ or higher
      D21-2 (IGF) or D28-23 (IGF1) - Body ground Always 10 kΩ or higher
      D20-2 (IGF) or D28-23 (IGF1) - Body ground Always 10 kΩ or higher
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D23-3 (IGT1) or D28-108 (IGT1) - Body ground Always 10 kΩ or higher
      D22-3 (IGT2) or D28-107 (IGT2) - Body ground Always 10 kΩ or higher
      D21-3 (IGT3) or D28-106 (IGT3) - Body ground Always 10 kΩ or higher
      D20-3 (IGT4) or D28-105 (IGT4) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the ignition coil assembly connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - ECM)

    OK

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs Click here.

    5. Shuffle arrangement of the ignition coil assemblies (among No. 1 to No. 4 cylinders).

      Note

      Do not shuffle the connectors.

    6. Put the engine in inspection mode (maintenance mode) Click here.

    7. Start the engine and wait for 10 seconds or more.

    8. Enter the following menus: Powertrain / Engine and ECT / DTC.

    9. Read the DTCs.

      Result
      Result Proceed to
      Same DTC output A
      Different ignition coil DTC output B

    B

    REPLACE IGNITION COIL ASSEMBLY Click here

    A

    REPLACE ECM Click here