DTC B1656: EEPROM Write Error: Description

Each module performs internal tests on EEPROM each time control module performs a write function to a memory address in EEPROM. Control module reads back data that has been written and compares it to incoming data. If data does not match after 3 consecutive write and verify attempts, control module will indicate a write malfunction is current. DTC will store when data read back after a write does not match data being written 3 consecutive times. When DTC is stored, control module finds another area to write information to. This new area becomes permanent area for storage of this information.