DTC B1003: MICU Update Error

NOTE: 

• NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
• This DTC is indicated when a MICU update is not completed properly.
• Before update the MICU, make sure the 12 volt battery in the vehicle is fully charged, and connect a jumper 12 volt battery (not a battery charger) to maintain system voltage.
• Never turn the vehicle to the ACCESSORY mode or OFF (LOCK) mode, during the reprogramming. If there is a problem with the reprogramming, turn the vehicle to the ON mode.

• 1. Problem verification:

  1. Clear the DTCs with the HDS.

  2. Turn the vehicle to the OFF (LOCK) 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.