DTC B1003 (Body Control Module): Notes

DTC B1003 : BCM Update error

Before you troubleshoot, review the How to Troubleshoot .

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 Checks .
This DTC is indicated when a body control module update is not completed properly.
Before updating the body control module, make sure the 12 volt battery in the vehicle is fully charged, and connect a 12 volt jumper battery (not a 12 volt 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.