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.
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HOMESERVICE MANUALSSUBARU2014LEGACY 2.5I, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSSECURITY AND LOCKS - KEYLESS ACCESS (W/PUSH BUTTON START) (DIAGNOSTICS)DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC B1577 IMM CONTROL MODULE EEPROMDTC DETECTING CONDITION
2014 Subaru Legacy 2.5i, Automatic CVT Trans
DTC B1577 IMM Control Module EEPROM: DTC Detecting Condition
2014 Subaru Legacy 2.5i, Automatic CVT TransSECTION DTC Detecting Condition
- Defective keyless access CM
- When inaccessible to ROM in keyless access CM.
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK DTC.
|
Is P1577 displayed? | Replace the keyless access CM. < Refer to KEYLESS ACCESS CM . > | System is normal. |
- ID code box malfunction
- When inaccessible to ROM in ID code box.
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK DTC.
|
Is P1577 displayed? | Replace the ID code box. < Refer to ID CODE BOX . > | System is normal. |
RENDER: 1.0x
NO RELATED
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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.