DTC B2790: ID Code Box Circuit

DTC detecting condition:

When EEPROM writing is not possible, or there is no reading response.

Trouble symptom:

Engine will not start.

CAUTION:

For replacement procedure of ID code box, refer to the "REGISTRATION INSTRUCTIONS FOR IMMOBILIZER" provided as a separate volume.
Before performing diagnosis, refer to "CAUTION" in "General Description". Refer to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

CHECK DTC.
1. Turn the ignition switch to OFF.
2. Perform the clear memory for «Keyless Access with Push Button Start» using the Subaru Select Monitor. Refer to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>CLEAR MEMORY .
3. Turn the ignition switch to OFF → ON.
4. Register the ID code box. Refer to the "REGISTRATION INSTRUCTIONS FOR IMMOBILIZER" provided as a separate volume.
5. Read DTCs of «Keyless Access with Push Button Start» using the Subaru Select Monitor. Refer to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
  Is DTC B2790 displayed? (Current malfunction)
  
  Yes: Replace the ID code box. Refer to SECURITY AND LOCKS>ID CODE BOX .
  
  No: ID code box registration was not performed properly.