Diagnostic Procedure

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Diagnostic Procedure
WARNING:

When performing inspection mode on a public road, pay sufficient attention to the traffic condition and give the highest priority to safe driving. 

  1. Turn the ignition switch to ON and wait for at least 10 seconds without starting the engine.
  2. Start the engine, and run the engine at idle for 60 seconds or more while the vehicle is at a standstill.
  3. Accelerate to 40 km/h (24.9 MPH) or more, and depress the brake pedal to stop the vehicle with the gear kept in D range.
  4. Check that the Auto Start Stop functions for at least 10 seconds.
  5. Release the brake pedal to restart.
  6. Turn the ignition switch to OFF, and wait for 10 seconds or more.
  7. If the Auto Start Stop does not function for 10 seconds or more in step 4), repeat steps  1 to  5 with the number of driving cycles described in the detection condition for each DTC. Ref. to AUTO START STOP (DIAGNOSTICS)>INSPECTION MODE .
  8. Read the diagnostic trouble code (DTC) and check the DTC. Ref. to AUTO START STOP (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
    NOTE:
    • If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis using "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". After solving the DTC, repeat from step   1 . 
    • When the Auto Start Stop functions for at least 10 seconds, the function recovers properly. 
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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.