DTC B1412: Immobilizer Control Module Can Register Stuck

Diagnosis start condition:

Battery voltage is 10 V or more.
The remote engine starter was not used to start the engine.

DTC detecting condition:

Defective immobilizer control module
Failed to access the ROM of immobilizer control module

Trouble symptom:

The security indicator does not blink after the ignition key is turned to OFF.
The security indicator remains off.

CAUTION: When the immobilizer 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.

CHECK DTC .
1. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
2. Wait for at least 10 seconds.
3. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
4. Turn the ignition switch to ON.
5. Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
6. Read the DTC of [Immobilizer] using the Subaru Select Monitor. Ref. to Immobilizer (Diagnostics)>Diagnostic Trouble Code (DTC) .
  Is DTC B1412 displayed? (Current malfunction)
  
  Yes : Go to 2 .
  
  No : Currently, it is normal.
CHECK DTC .
1. Turn the ignition switch to OFF.
2. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
3. Wait for at least 10 seconds.
4. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
5. Turn the ignition switch to ON.
6. Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
7. Read the DTC of [Immobilizer] using the Subaru Select Monitor. Ref. to Immobilizer (Diagnostics)>Diagnostic Trouble Code (DTC) .
  Is DTC B1412 displayed? (Current malfunction)
  
  Yes : Go to 3 .
  
  No : Currently, it is normal.
CHECK DTC .
1. Turn the ignition switch to OFF.
2. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
3. Wait for at least 10 seconds.
4. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
5. Turn the ignition switch to ON.
6. Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
7. Read the DTC of [Immobilizer] using the Subaru Select Monitor. Ref. to Immobilizer (Diagnostics)>Diagnostic Trouble Code (DTC) .
  Is DTC B1412 displayed? (Current malfunction)
  
  Yes : Replace the immobilizer control module. Ref. to SECURITY AND LOCKS>IMMOBILIZER CONTROL MODULE .
  
  No : Currently, it is normal.