# Head Memory related Fatal Errors (5)

#Error code

• 031013 Head memory writing error
• 031014 Head BRS/XDS flash memory write error
• 031015 Head NVT flash memory writing error
• 031016 Head ID flash memory writing error
• 031019 Head memory reading error

#Occurrence condition

• 031013 Communication failure when in writing main unit data to head memory before head replacement
• 031014 Data verification mismatch when in writing BRS / XDS data to head memory, when replacing Head Unit
• 031015 Data verification mismatch when in writing NVT result to head memory, when replacing Head Unit
• 031016 Data verification mismatch when in writing head use history to head memory, when replacing Head Unit
• 031019 Communication failure when in reading head data from head memory after Head Unit replacement

#Assumed cause

• Noise occurred when reading memory information or communication failed.
• Head memory has failed.
• FFC is disconnected.

#Related parts

• Head Unit
• Head FFC

#Troubleshooting