Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Symptom 1: Engine Does Not Stop
Probable defective cause:
- Judged the vehicle status as "Auto Start Stop conditions are not met".
- One of Auto Start Stop conditions is not established.
For Auto Start Stop conditions, refer to "Data Monitor". Ref. to AUTO START STOP (DIAGNOSTICS)>DATA MONITOR .
- CHECK Auto Start Stop INDICATOR
.
Check the illumination status of Auto Start Stop indicator. Ref. to AUTO START STOP (DIAGNOSTICS)>AUTO START STOP INDICATOR>CONDITION CHECK .
Is the illumination status of Auto Start Stop indicator OK?
Yes: Go to 2 .
No: Check the Auto Start Stop indicator. Ref. to AUTO START STOP (DIAGNOSTICS)>AUTO START STOP INDICATOR>AUTO START STOP INDICATOR DOES NOT ILLUMINATE OR REMAINS ON .
- CHECK DTC
.
- Start the engine.
- Using the Subaru Select Monitor, read all DTCs. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
Are any DTCs displayed?
Yes: Perform the diagnosis according to the DTC.
No: Go to 3 .
- CHECK Auto Start Stop
.
- Start the engine.
- Warm up the engine until engine coolant temperature is higher than 75°C (167°F) and ATF temperature higher than 50°C (122°F).
- Turn off all the electric load.
- Check that the hood is closed.
- Drive the vehicle at 40 km/h (24.9 MPH) or more, and then stop the vehicle at a level and safe place with the steering wheel in straight direction.
- Depress the brake pedal firmly.
Does Auto Start Stop operate?
Yes: The vehicle has returned to a normal condition at this time.
NOTE:Auto Start Stop operation condition may have not been established for a moment.
No: Check the appropriate items using the list of check items classified by symptoms. Ref. to AUTO START STOP (DIAGNOSTICS)>DIAGNOSTICS WITH PHENOMENON>INSPECTION>LIST OF CHECK ITEMS CLASSIFIED BY SYMPTOMS .
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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.
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