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C0 Model

DTC detecting condition:

ID code box malfunction
Inaccessible to ROM in ID code box

Trouble symptom:

Engine cannot be started.

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 (DIAGNOSTICS)>General Description> CAUTION .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, perform the clear memory of [Engine]. Ref. to COMMON (diag)>CLEAR MEMORY .
3. Turn the ignition switch to OFF.
4. Register the ID code box.
5. Read the DTC of [Engine] using the Subaru Select Monitor again. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>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.