SFI 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

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 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 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.

A004JMKE03
DTC No. DTC Detection Condition Trouble Area
P0351

The ECM driver IC detects open and short in signal line circuit between No. 1 ignition coil and ECM (open circuit detected / GND short / +B short).

(1 trip detection logic)

  • Ignition system

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

  • Ignition coil (No. 1 to No. 4 cylinder)

  • ECM
P0352

The ECM driver IC detects open and short in signal line circuit between No. 2 ignition coil and ECM (open circuit detected / GND short / +B short).

(1 trip detection logic)
P0353

The ECM driver IC detects open and short in signal line circuit between No. 3 ignition coil and ECM (open circuit detected / GND short / +B short).

(1 trip detection logic)
P0354

The ECM driver IC detects open and short in signal line circuit between No. 4 ignition coil and ECM (open circuit detected / GND short / +B short).

(1 trip detection logic)

MONITOR DESCRIPTION

If the ECM receives a malfunction signal from the ECM driver IC, ECM recognizes that there is an open or short in signal line circuit between the ignition coil and ECM and stores the DTCs.

CONFIRMATION DRIVING PATTERN


  1. A004ISCE17

  2. Connect the GTS to the DLC3.

  3. Turn the ignition switch to ON and turn the GTS on.

  4. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.

  5. Turn the ignition switch off and wait for at least 30 seconds.

  6. Turn the ignition switch to ON and turn the GTS on.

  7. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

  8. With the vehicle stationary, depress the accelerator pedal and maintain an engine speed of between 2500 and 3000 rpm for 40 seconds or more [A].

  9. Drive the vehicle at 10 km/h (6.25 mph) or more for 1 minute or more [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  10. Enter the following menus: Powertrain / Engine / Trouble Codes.

  11. Read pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  13. Input the DTC: P0351, P0352, P0353 or P0354.

  14. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

  15. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

A004HWTE07

CAUTION / NOTICE / HINT

Note

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. 2 ignition coil (No. 2 cylinder) circuit.

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

  • If DTC P0354 is output, check the No. 4 ignition coil (No. 4 cylinder) circuit.

  • Read freeze frame data using the GTS. 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 WHETHER DTC OUTPUT RECURS


    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. Turn the ignition switch off and wait for at least 30 seconds.

    6. Shuffle the arrangement of the ignition coils (among No. 1 to No. 4 cylinders).

      Note

      Do not change the location of the connectors.

    7. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    8. Enter the following menus: Powertrain / Engine / Trouble Codes.

    9. Read DTCs.

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

    B

    REPLACE IGNITION COIL Click here

    A

  2. INSPECT TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL)


    1. A004IS2E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Ignition Coil)
      *b No. 1 cylinder
      *c No. 2 cylinder
      *d No. 3 cylinder
      *e No. 4 cylinder

      Disconnect the 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
      C38-1 (+B) - Body ground Ignition switch ON 11 to 14 V
      C28-1 (+B) - Body ground Ignition switch ON 11 to 14 V
      C39-1 (+B) - Body ground Ignition switch ON 11 to 14 V
      C27-1 (+B) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the ignition coil connectors.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      C38-2 (GND) - Body ground Always Below 1 Ω
      C28-2 (GND) - Body ground Always Below 1 Ω
      C39-2 (GND) - Body ground Always Below 1 Ω
      C27-2 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the ignition coil connectors.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      A36-21 (IGT1) - C38-3 (IGT1) Always Below 1 Ω
      A36-10 (IGT2) - C28-3 (IGT2) Always Below 1 Ω
      A36-31 (IGT3) - C39-3 (IGT3) Always Below 1 Ω
      A36-8 (IGT4) - C27-3 (IGT4) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      A36-21 (IGT1) or C38-3 (IGT1) - Body ground Always 10 kΩ or higher
      A36-10 (IGT2) or C28-3 (IGT2) - Body ground Always 10 kΩ or higher
      A36-31 (IGT3) or C39-3 (IGT3) - Body ground Always 10 kΩ or higher
      A36-8 (IGT4) or- C27-3 (IGT4) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR