Note. DTC B1284 sets when there is no communication from passenger side junction block ECU and body ECU.
Disconnect passenger side junction block ECU connector. (Схема №8) Disconnect air bag sensor 28-pin connector. Disconnect ECM 35-pin connector. (Схема №10). Check for continuity in Red/Blue wire between passenger side junction block connector terminal No. 2 and air bag sensor assembly connector terminal No. 22. Check for continuity in Gray/Black wire between passenger side junction block ECU connector terminal No. 4 and ECM connector terminal No. 21. Repair wiring as necessary. If wiring is okay, replace passenger side junction block ECU.