DTC B2781: Steering Lock Control Module Control Circuit

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.

DTC detecting condition:

When any of the following conditions is established.

Steering lock position (inside steering lock control module) sensor malfunction
Steering lock motor driver (inside steering lock control module) short circuit malfunction
Steering lock motor driver (inside steering lock control module) open circuit malfunction

Trouble symptom:

The steering lock cannot be released.
Engine will not start.

CAUTION:

For replacement procedure of steering lock control module, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION

NOTE:

When all ECMs connected to collation system LIN bus cannot communicate with the keyless access control module, DTC B2785 is output. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2785 LIN COMMUNICATION

CHECK DTC .
1. Turn the ignition switch to ON.
2. Read the DTC of [Keyless Access with Push Button Start (Collation)] using the Subaru Select Monitor. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)
Is DTC B2785 displayed? (Current code)

Yes : Perform the diagnosis of DTC B2785. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B2785 LIN COMMUNICATION

No : Replace the steering lock control module. Ref. to SECURITY AND LOCKS>STEERING LOCK CONTROL MODULE>REPLACEMENT