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 MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSSECURITY AND LOCKS - KEYLESS ACCESS (W/PUSH BUTTON START) (DIAGNOSTICS)DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC B1577 IMM CONTROL MODULE EEPROMFOR C0 AND C5 MODELSTROUBLE SYMPTOM
2016 Subaru Legacy 2.5i
For C0 And C5 Models: Trouble Symptom
2016 Subaru Legacy 2.5iSECTION Trouble Symptom
Engine will not start.
CAUTION:
For replacement procedure of ID code box, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
DIAGNOSTICS PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
1 CHECK DTC.
|
Is B1577 displayed? | Replace the ID code box. < Ref. to ID CODE BOX . > | Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
|
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.