Body Control

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Other than for C0 model

DTC	Description & trouble part	Reference	Relation between ECM and DTC
B1402	IMMOBILIZER KEY COLLATION	Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1402 IMMOBILIZER KEY COLLATION	B1572
B1403	IMMOBILIZER SUB CONTROL MODULE COLLATION	Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1403 IMMOBILIZER SUB CONTROL MODULE COLLATION	B1572
B1404	IMMOBILIZER SUB CONTROL MODULE COMMUNICATION	Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1404 IMMOBILIZER SUB CONTROL MODULE COMMUNICATION	B1572
B140A	IMMOBILIZER SUB CONTROL MODULE NON-VOLATILE MEMORY	Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B140A IMMOBILIZER SUB CONTROL MODULE NON-VOLATILE MEMORY	B1572
B1410	TRANSPONDER COMMUNICATION	Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1410 TRANSPONDER COMMUNICATION	B1572
B1411	IMMOBILIZER ANTENNA	Ref. to IMMOBILIZER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1411 IMMOBILIZER ANTENNA	B1572

NOTE:

The starter relay control is performed in immobilizer system. When the body integrated unit detects a nonconformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Therefore, check DTC on the body integrated unit to identify the cause of the engine not starting.