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
Body Integrated Unit
BODY INTEGRATED UNIT DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Item | Contents of diagnosis | Index No. | Relation between ECM and DTC |
|---|---|---|---|---|
| B1401 | Meter Collation | Reference code incompatibility between combination meter and body integrated unit | <Ref. to DTC B1401 METER COLLATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1578 |
| B1402 | Immobilizer Key Collation |
|
<Ref. to DTC B1402 IMMOBILIZER KEY COLLATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> |
|
| B1405 | SCU Collation | Reference code incompatibility between body integrated unit and security control module | <Ref. to DTC B1405 SCU COLLATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1578 |
| B1406 | SCU_EEPROM | Malfunction of security control module | <Ref. to DTC B1406 SCU_EEPROM , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1578 |
| B1407 | Met Communication | Communication failure between body integrated unit and combination meter | <Ref. to DTC B1407 MET COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1578 |
| B1408 | Meter Non-Volatile Memory | Combination meter malfunction | <Ref. to DTC B1408 METER NON-VOLATILE MEMORY , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1578 |
| B1409 | SCU Communication | Communication failure between body integrated unit and security control module | <Ref. to DTC B1409 SCU COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1578 |
| B1410 | Transponder Communication | Communication failure between key and body integrated unit | <Ref. to DTC B1410 TRANSPONDER COMMUNICATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1574 |
| B1411 | Immobilizer Antenna | Faulty antenna | <Ref. to DTC B1411 IMMOBILIZER ANTENNA , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | B1570 |
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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