DTC U0312 (124): BCM, MCM and PGM-FI System Program Version Mismatch

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
This DTC is indicated when a MCM update is not completed.
Do not turn the ignition switch to ACCESSORY (l) or to LOCK (0) while updating the MCM. If you do, the MCM can be damaged.

Do the MCM (IMA Motor) update procedure (see MOTOR CONTROL MODULE (MCM) UPDATE ).
Check for Pending or Confirmed DTCs with the HDS.
Is DTC U0312 (124) indicated?

YES -Replace the original MCM (see MOTOR CONTROL MODULE (MCM) REMOVAL/INSTALLATION ).

NO -Update is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.