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Home >> Saturn >> 2001 >> LW300 V6-3.0L VIN R >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Body Control Module >> Description and Operation >> ECU Malfunction
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ECU Malfunction

The 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, DTC B1000 - ECU Malfunction sets. The checksum is the contents of each memory location in EEPROM added together.
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