DTC B1405 SCU Collation

DTC detecting condition:

Reference code incompatibility between security control module and body integrated unit

CAUTION: When the security control module is replaced, registration of the immobilizer system is required. For details, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume. Contact an Authorized Subaru Dealership.

CHECK DTC .
Read the DTC of the body integrated unit. Ref. to IMMOBILIZER (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC)

Is DTC B1406 or B1409 displayed?

Yes: Perform the diagnosis for the displayed DTC B1406 or B1409.

No: Go to 2
PERFORM SECURITY CONTROL MODULE REGISTRATION .
Perform security control module registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume. Contact an Authorized Subaru Dealership.

Is registration complete?

Yes: Currently, it is normal. (Security control module registration is not complete.)

No: Go to 3
CHECK DTC .
1. Perform the Clear Memory Mode. Ref. to IMMOBILIZER (DIAGNOSTICS)>Clear Memory Mode
2. Read the DTC of the body integrated unit. Ref. to IMMOBILIZER (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC)
Is DTC B1406 or B1409 displayed?

Yes: Perform the diagnosis for the displayed DTC B1406 or B1409.

No: Replace the security control module. Ref. to SECURITY AND LOCKS>Security Control Module