hello this Service Manual PIONER KXE60 is very good, thanks.
Text excerpt from page 402 (click to view)
Rewriting the ECC Board Data (option)
1. Unplug the power cord from the power outlet with the Power Switch OFF. 2. Remove the Rear Cover. 3. Insert the memory card into the ECC Board.
4. Plug the power cord into the power outlet. 5. Turn ON the Power Switch. 6. This starts the rewriting sequence. NOTE D1 on the Master Board remains blinking while data is being rewritten.
7. Check that D3 on the ECC Board turns ON. 8. If an LED other than D3 turns ON or if it takes longer than 3 min. to rewrite the data, perform steps 9 and 10, turn OFF the Power Switch, and start the procedure over beginning with step 4. 9. Unplug the power cord from the power outlet. NOTE At this time, do not turn OFF the Power Switch. 10. Remove the memory card.