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Home >> Subaru >> 2016 >> BRZ Series.HyperBlue >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnostics (2 Of 3) >> 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 >> Description of functions >> Inspection steps

Inspection steps

CAUTION: Before performing troubleshooting, check the fuse for this circuit.
NOTE:
  • If DTC P0351 is displayed, check the ignition coil assembly No. 1 circuit.
  • If DTC P0352 is displayed, check the ignition coil assembly No. 2 circuit.
  • If DTC P0353 is displayed, check the ignition coil assembly No. 3 circuit.
  • If DTC P0354 is displayed, check the ignition coil assembly No. 4 circuit.
  • Read the freeze frame data using the SSM3. A part of the engine running conditions under which the engine trouble occurred is recorded in the freeze frame data, which is useful for troubleshooting.
  1. Clear DTC
    1. Connect the SSM3 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM3.
    4. Follow the SSM3 on-screen instructions to clear the DTCs. (Refer to CHECKING/CLEARING DTC )
    5. Turn the ignition switch to OFF, and wait for 30 seconds.

      Next

  2. Perform test drive for operation check
    1. Change the position of the ignition coil assembly and test drive the vehicle. (refer to "TEST DRIVE " under "Description of functions")
      CAUTION: Do not change the position of the ignition coil connectors.
    2. With IG ON, follow the SSM3 on-screen instructions to check the DTC. (Refer to CHECKING/CLEARING DTC )

      Result

      Result Go to
      DTC does not change. A
      DTCs with different igniter system are output. B

      B: Replacement of ignition coil assembly (Refer to REMOVAL )

      A: Go to next step

  3. Check wiring harness and connector (ignition coil assembly power supply circuit)
    NOTE: For the inspection procedure and precautions for wiring harnesses and connectors, refer to INSPECTION PROCEDURES FOR ELECTRICAL CIRCUITS AND HOW TO PERFORM .
    1. Disconnect the connector of the ignition coil assembly.
    2. Measure the voltage between the terminals.

      Voltage

      RESISTANCE REFERENCE (SHORT CIRCUIT CHECK)

      Inspection terminals Inspection conditions Standard value
      C38-1 (+B) - chassis ground IG ON 11 to 14 V
      C28-1 (+B) - chassis ground IG ON 11 to 14 V
      C39-1 (+B) - chassis ground IG ON 11 to 14 V
      C27-1 (+B) - chassis ground IG ON 11 to 14 V
      Fig 1: Ignition Coil Assembly Connector End View (C38 Cylinder No. 1, C28 Cylinder No. 2, C39 Cylinder No. 3 & C27 Cylinder No. 4)
      G10212848Courtesy of SUBARU OF AMERICA, INC.

      NG: Repair or replacement of wiring harness or connector

      OK: Go to next step

  4. Check wiring harness and connector (ignition coil assembly - chassis ground)
    NOTE: For the inspection procedure and precautions for wiring harnesses and connectors, refer to INSPECTION PROCEDURES FOR ELECTRICAL CIRCUITS AND HOW TO PERFORM .
    1. Disconnect the connector of the ignition coil assembly.
    2. Measure the resistance between the terminals.

      Resistance (open circuit check)

      RESISTANCE REFERENCE (SHORT CIRCUIT CHECK)

      Inspection terminals Inspection conditions Standard value
      C38-2 (GND) - chassis ground Always Less than 1 Ω
      C28-2 (GND) - chassis ground Always Less than 1 Ω
      C39-2 (GND) - chassis ground Always Less than 1 Ω
      C27-2 (GND) - chassis ground Always Less than 1 Ω

      NG: Repair or replacement of wiring harness or connector

      OK: Go to next step

  5. Check wiring harness and connector (engine control computer - ignition coil assembly)
    NOTE: For the inspection procedure and precautions for wiring harnesses and connectors, refer to INSPECTION PROCEDURES FOR ELECTRICAL CIRCUITS AND HOW TO PERFORM .
    1. Disconnect the connector for the engine control computer.
    2. Disconnect the connector of the ignition coil assembly.
    3. Measure the resistance between the terminals. (Refer to for the TERMINAL ARRANGEMENT )

      Resistance (open circuit check)

      RESISTANCE REFERENCE (SHORT CIRCUIT CHECK)

      Inspection terminals Inspection conditions Standard value
      A36-21 (IGT1) - C38-3 Always Less than 1 Ω
      A36-10 (IGT2) - C28-3 Always Less than 1 Ω
      A36-31 (IGT3) - C39-3 Always Less than 1 Ω
      A36-8 (IGT4) - C27-3 Always Less than 1 Ω

      Resistance (short circuit check)

      RESISTANCE REFERENCE (SHORT CIRCUIT CHECK)

      Inspection terminals Inspection conditions Standard value
      A36-21 (IGT1) and C38-3 (IGT1) - other terminals and chassis ground Always 10 k Ωor more
      A36-10 (IGT2) and C28-3 (IGT2) - other terminals and chassis ground Always 10 k Ωor more
      A36-31 (IGT3) and C39-3 (IGT3) - other terminals and chassis ground Always 10 k Ωor more
      A36-8 (IGT4) and C27-3 (IGT4) - other terminals and chassis ground Always 10 k Ωor more

      NG: Repair or replacement of wiring harness or connector

      OK: Replacement of the engine control computer (Refer to REMOVAL )

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