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For C0 And C5 Models

DTC detecting condition:

ID code box malfunction
When inaccessible to ROM in ID code box.

Trouble symptom:

Engine will not start.

CAUTION:

For replacement procedure of ID code box, 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 SYSTEM (DIAGNOSTICS)>General Description>CAUTION .

CHECK DTC.
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, perform the clear memory for «Engine». Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>CLEAR MEMORY .
3. Turn the ignition switch to OFF.
4. Register the ID code box. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
5. After 5 seconds or more, read the DTC of «Engine» using the Subaru Select Monitor. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B1577 displayed? (Current malfunction)

Yes: Replace the ID code box. Ref. to SECURITY AND LOCKS>ID CODE BOX .

No: Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.