The body control module (BCM) performs an electrically erasable programmable read only memory (EEPROM) checksum as a part of its internal diagnostics as the BCM is operating. When the EEPROM checksum does not equal a predetermined value, the DTC sets. The checksum is the contents of each memory location in EEPROM added together.

If DTC B1000 is set, clear the DTCs using the scan tool. Cycle the ignition OFF. Wait 10 seconds. Cycle the ignition ON. If DTC B1000 remains a current code, replace the BCM.