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.
2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Immobilizer (ECM)
IMMOBILIZER (ECM) DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Item | Content of diagnosis | Note |
|---|---|---|---|
| B1571 | REFERENCE CODE INCOMPATIBILITY | Reference code mismatch occurs between Keyless Access Control Module (model without ID code box) or ID code box (model with ID code box) and ECM. | <Ref. to DTC B1571 REFERENCE CODE INCOMPATIBILITY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1572 | IMM CIRCUIT EXCEPT ANTENNA CIRCUIT | Communication error occurs between Keyless Access Control Module (model without ID code box) or ID code box (model with ID code box) and ECM. | <Ref. to DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1576 | EGI CONTROL MODULE EEPROM | ECM malfunctioning | <Ref. to DTC B1576 EGI CONTROL MODULE EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
| B1577 | IMM CONTROL MODULE EEPROM | Malfunction occurs in Keyless Access Control Module (model without ID code box) or ID code box (model with ID code box). | <Ref. to DTC B1577 IMM CONTROL MODULE EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
Factory Service Tools
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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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