After you got the 10 flashes , you hold again for 2-3 sec for the next code , and so on..
Your step # 4 is incorrect.
After all codes have been retrieved , then the 10 will reappear , telling you
the process has been completed. [ the codes come up in numerical sequence]
if you want to clear the codes , you hold the sw for 8 sec after each code appears.. that will cancel/clear THAT previous code .. to clear all codes , you have to do that after each code.
Then turn key off 10 secs , on 30 sec and start car.. CE will then go out