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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 17 (ENGINE CONTROL SYSTEM (2.5L) (DIAGNOSTICS) - INTRODUCTION)BASIC DIAGNOSTIC PROCEDUREPROCEDURE
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

Basic Diagnostic Procedure: Procedure

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Procedure
WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ENGINE START FAILURE  .
    1. Ask the customer when and how the trouble occurred using the Check List for Interview. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>CHECK LIST FOR INTERVIEW .
    2. Start the engine.

    Does the engine start?

    Yes:  Go to  2.

    No:  Check "Diagnostics with Phenomenon". Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>DIAGNOSTICS WITH PHENOMENON .

  2. CHECK ILLUMINATION OF MALFUNCTION INDICATOR LIGHT  .

    Check the illumination status of malfunction indicator light. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>WARNING LIGHT ILLUMINATION PATTERN .

    Does the malfunction indicator light illuminate?

    Yes:  Go to  3.

    No:  Check "Warning Light Illumination Pattern". Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>WARNING LIGHT ILLUMINATION PATTERN .

  3. CHECK COMMUNICATION STATUS  .
    1. Turn the ignition switch to OFF.
    2. Connect the Subaru Select Monitor or general scan tool to the data link connector.
    3. Turn the ignition switch to ON, and run the Subaru Select Monitor or general scan tool.
    NOTE:
    • Subaru Select Monitor 

      For detailed operation procedures, refer to "Help" of application. 

    • General scan tool 

    For detailed operation procedures, refer to the general scan tool operation manual. 

    Does Subaru Select Monitor or general scan tool communicate with vehicle normally?

    Yes:  Go to  4.

    No:  Check the LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (EXCEPT FOR HEV)>BASIC DIAGNOSTIC PROCEDURE .

  4. CHECK DTC  .

    Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC displayed on Subaru Select Monitor or general scan tool?

    Yes:  Record DTC and freeze frame data, then repair the trouble cause. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) . Ref. to COMMON (DIAG)>FREEZE FRAME DATA . After repair, go to the next step.

    Go to  5.

    No:  Repair the related parts.

    NOTE:

    If DTC is not shown on display although the malfunction indicator light illuminates, perform the diagnosis of malfunction indicator light circuit or combination meter. Ref. to  ENGINE (DIAGNOSTICS) (H4DO 2.5)>WARNING LIGHT ILLUMINATION PATTERN  . 

  5. FINAL CHECK  .
    1. Connect all connectors.
    2. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
    3. Execute the inspection mode. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>INSPECTION MODE .
    4. Check the readiness code of [Engine] using Subaru Select Monitor and confirm that the diagnosis is completed. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>ALL READINESS DIAGNOSTIC CODE(S) .
    5. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC displayed on Subaru Select Monitor or general scan tool?

    Yes:  Check the connection of connector. If there is no faulty connector, perform the diagnosis for the displayed DTCs. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

    No:  Finish the diagnosis.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.