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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 3) >> EFI System (FA20) >> DTC P0010: A Camshaft Position Actuator Circuit/Open (Bank 1); DTC P0020: A Camshaft Position Actuator Circuit/Open (Bank 2) >> Description of functions >> Inspection steps

Inspection steps

NOTE:
  • Read the freeze frame data using the SSM4. 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.
  • Bank 1 shows the side where No. 1 cylinder is located.
  • Bank 2 shows the side where No. 2 cylinder is located.
  1. Clear DTC
    1. Connect the SSM4 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM4.
    4. Follow the SSM4 on-screen instructions to clear the DTCs. (Refer to CHECKING/CLEARING DTC )

    Next

  2. Read DTC
    1. Connect the SSM4 to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn on the SSM4.
    4. Follow the SSM4 on-screen instructions to check the DTC. (Refer to CHECKING/CLEARING DTC )

    Result

    Result Go to
    P0010 or P0020 is output. A
    No DTC is output. B

    B: Inspection for problems that do not normally occur (Refer to INSPECTION FOR PROBLEMS THAT DO NOT NORMALLY OCCUR )

    A: Go to next step

  3. Camshaft timing oil control valve ASSY unit inspection (intake side)
    1. Perform a unit inspection of camshaft timing oil control valve ASSY. (Refer to UNIT INSPECTION )

    NG: Replacement of camshaft timing oil control valve ASSY (intake side) (Refer to REMOVAL )

    OK: Go to next step

  4. Check wiring harness and connector (camshaft timing oil control valve ASSY (intake side) 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 camshaft timing oil control valve ASSY (intake side) connector.
    2. Measure the voltage between the terminals.

    Voltage

    Inspection terminals Inspection conditions Standard value
    C7-1 - chassis ground IG ON 11 to 14 V
    C24-1 - chassis ground IG ON 11 to 14 V
    G12586138Courtesy of SUBARU OF AMERICA, INC.

    NG: Go to step  6.

    OK: Go to next step

  5. Check wiring harness and connector (engine control computer - camshaft timing oil control valve ASSY (intake side))
    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 camshaft timing oil control valve ASSY (intake side) connector.
    3. Measure the resistance between the terminals. (For terminal arrangement, refer to ECM TERMINAL ARRANGEMENT .)

    Resistance (open circuit check)

    Inspection terminals Inspection conditions Standard value
    A36-17 (OC1) - C7-2 Always Less than 1 Ω
    A36-16 (OC2) - C24-2 Always Less than 1 Ω

    Resistance (short circuit check)

    Inspection terminals Inspection conditions Standard value
    A36-17 (OC1) and C7-2 - other terminals and chassis ground Always 10 k Ω or more
    A36-16 (OC2) and C24-2 - other terminals and chassis ground Always 10 k Ω or more

    NG: Repair or replacement of wiring harness or connector

    OK: Go to next step

    Replacement of the engine control computer (Refer to REMOVAL )

  6. Relay unit inspection (EFI MAIN1 relay)
    1. Perform unit inspection of EFI MAIN1 relay. (Refer to RELAY )

    NG: Relay replacement (EFI MAIN1 relay)

    OK: Go to next step

  7. Check wiring harness and connector (EFI Main 1 relay - camshaft timing oil control valve ASSY (intake side))
    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 camshaft timing oil control valve ASSY (intake side) connector.
    2. Remove the EFI MAIN1 relay from the engine compartment relay block.
    3. Measure the resistance between the terminals. (For terminal arrangement, refer to ECM TERMINAL ARRANGEMENT .)

    Resistance (open circuit check)

    Inspection terminals Inspection conditions Standard value
    3 (EFI MAIN1 relay holder) - C7-1 Always Less than 1 Ω
    3 (EFI MAIN1 relay holder) - C24-1 Always Less than 1 Ω

    Resistance (short circuit check)

    Inspection terminals Inspection conditions Standard value
    3 (EFI MAIN1 relay holder) and C7-1 - other terminals and chassis ground Always 10 k Ω or more
    3 (EFI MAIN1 relay holder) and C24-1 - other terminals and chassis ground Always 10 k Ω or more
    CAUTION: When using tester probes to take measurements at a holder, do not push them hard against the holder. Otherwise the holder could be damaged.

    NG: Repair or replacement of wiring harness or connector

    OK: Go to next step

    Inspection of the ECM power supply system (Refer to ECM POWER SUPPLY SYSTEM )

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