DTC U1281: Lost Communication With MICU (MICU frame)

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back to ON (II).
Wait for at least 6 seconds.
Check for DTCs with the HDS.
Is DTC U1281 indicated?

YES -Go to the MICU input test and do all power, ground, and communication input tests (see MICU INPUT TEST ). If the tests prove OK, replace the under-dash fuse/relay box.
- USA models (see REMOVAL AND INSTALLATION )
- Canada models (see CANADA MODELS )
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections at under-dash fuse/relay box connector Y (16P) and the related units.