SFI SYSTEM, Diagnostic DTC:P0351, P0352, P0353

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

DESCRIPTION

A direct ignition system is used on this vehicle.

The direct ignition system is a 1-cylinder ignition system in which each cylinder is ignited by one No. 1 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 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 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.

DTC No. DTC Detection Condition Trouble Area
P0351 Open or short in No. 1 ignition coil (No. 1 cylinder) signal circuit (3 trip detection logic).

  • Ignition system

  • Open or short in No. 1 ignition coil (No. 1 cylinder) circuit

  • No. 1 ignition coil (No. 1 cylinder)

  • ECM
P0352 Open or short in No. 1 ignition coil (No. 2 cylinder) signal circuit (3 trip detection logic).

  • Ignition system

  • Open or short in No. 1 ignition coil (No. 2 cylinder) circuit

  • No. 1 ignition coil (No. 2 cylinder)

  • ECM
P0353 Open or short in No. 1 ignition coil (No. 3 cylinder) signal circuit (3 trip detection logic).

  • Ignition system

  • Open or short in No. 1 ignition coil (No. 3 cylinder) circuit

  • No. 1 ignition coil (No. 3 cylinder)

  • ECM

WIRING DIAGRAM

A01VLHVE01

CAUTION / NOTICE / HINT

Note


  • Perform idle learning after replacing the ECM Click here.

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

Tech Tips


  • These DTCs indicate malfunctions relating to the primary circuit.

  • If DTC P0351 is output, check the No. 1 ignition coil (No. 1 cylinder) circuit.

  • If DTC P0352 is output, check the No. 1 ignition coil (No. 2 cylinder) circuit.

  • If DTC P0353 is output, check the No. 1 ignition coil (No. 3 cylinder) circuit.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. 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. PERFORM SIMULATION TEST (SHUFFLE ARRANGEMENT OF NO. 1 IGNITION COILS)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Shuffle arrangement of the No. 1 ignition coils (among No. 1 to No. 3 cylinders).

      Note

      Do not change the location of the connectors.

    6. Perform a simulation test.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.

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

    B

    REPLACE NO. 1 IGNITION COIL Click here

    A

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 IGNITION COIL)


    1. A01VEWRE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 1 Ignition Coil)

      Disconnect the No. 1 ignition coil connectors.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B14-1 (+B) - B14-4 (GND) Ignition switch ON 11 to 14 V
      B16-1 (+B) - B16-4 (GND) Ignition switch ON 11 to 14 V
      B18-1 (+B) - B18-4 (GND) Ignition switch ON 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - BODY GROUND) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - ECM)


    1. Disconnect the B14, B16 and B18 No. 1 ignition coil connectors.

    2. Disconnect the B97 ECM connector (for LHD).

    3. Disconnect the B101 ECM connector (for RHD).

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B97-27 (IGT1) - B14-3 (IGT) Always Below 1 Ω
      B97-26 (IGT2) - B16-3 (IGT2) Always Below 1 Ω
      B97-57 (IGT3) - B148-3 (IGT3) Always Below 1 Ω
      B97-27 (IGT1) or B14-3 (IGT) - Body ground Always Below 1 Ω
      B97-26 (IGT2) or B16-3 (IGT2) - Body ground Always Below 1 Ω
      B97-57 (IGT3) or B18-3 (IGT3) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      B101-27 (IGT1) - B14-3 (IGT) Always Below 1 Ω
      B101-26 (IGT2) - B16-3 (IGT2) Always Below 1 Ω
      B101-57 (IGT3) - B148-3 (IGT3) Always Below 1 Ω
      B101-27 (IGT1) or B14-3 (IGT) - Body ground Always Below 1 Ω
      B101-26 (IGT2) or B16-3 (IGT2) - Body ground Always Below 1 Ω
      B101-57 (IGT3) or B18-3 (IGT3) - Body ground Always Below 1 Ω

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - BODY GROUND)


    1. Disconnect the B14, B16 and B18 No. 1 ignition coil connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B14-4 (GND) - Body ground Always Below 1 Ω
      B16-4 (GND) - Body ground Always Below 1 Ω
      B18-4 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (NO. 1 IGNITION COIL - NO. 1 INTEGRATION RELAY)


    1. Disconnect the B14, B16 and B18 No. 1 ignition coil connectors.

    2. Remove the No. 1 integration relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B14-1 (+B) - 1E-2 Always Below 1 Ω
      B16-1 (+B) - 1E-2 Always Below 1 Ω
      B18-1 (+B) - 1E-2 Always Below 1 Ω
      B14-1 (+B) or 1E-2 - Body ground Always 10 kΩ or higher
      B16-1 (+B) or 1E-2 - Body ground Always 10 kΩ or higher
      B18-1 (+B) or 1E-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT NO.1 INTEGRATION RELAY (IG2 RELAY)


    1. Inspect the No. 1 integration relay Click here.


    OK

    CHECK ECM POWER SOURCE CIRCUIT Click here

    NG

    REPLACE NO.1 INTEGRATION RELAY Click here