Note. DTC B1277 sets when communication stops between center cluster integration and body ECU.
Disconnect center cluster integration panel ECU 10-pin connector. Disconnect A/C ECU 31-pin connector. (Схема №11) Disconnect body ECU 22-pin connector. (Схема №5) Check continuity of Gray/Black wire between center cluster integration panel ECU connector terminal No. 3 and A/C ECU connector terminal No. 4. Check continuity of Gray/Black wire between center cluster integration panel ECU connector terminal No. 8 and body ECU connector terminal No. 5. Repair wiring as necessary. If wiring is okay, replace center cluster integration panel.