This DTC is indicated when a MICU update is not completed properly.
Before updating the MICU, make sure the battery in the vehicle is fully charged, and connect a jumper battery (not a battery charger) to maintain system voltage.
Never turn the ignition switch to ACC (I) or LOCK (0) or press the engine start/stop button to select the ACC or OFF mode, during the update. If there is a problem with the update, turn the ignition switch to ON (II) or press the engine start/stop button to select the ON mode.
1.
Problem verification:
Problem verification
?1.
Clear the DTCs with the HDS.
?2.
Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode.
?3.
Check for DTCs with the HDS.
DTC Description
DTC
B1003 MICU Update Error
Is DTC B1003 indicated?
YES
Update the MICU.?
NO
Intermittent failure, the system is OK at this time.?
