How to: Toyota Corolla old model pre-2004 lost key programming using UPA USB EEPROM programmer and TM100. This car has 4C chip and can be made programming 93C56 EEPROM in Car ECU / ECM. Step 1: Read EEPROM
Disassemble ECU under the dashboard
Open ECU box, locate EEPROM IC 93C56
Desolder IC chip and solder it to UPA EEPROM 93CXX adapter using a hot gun
Connect 93CXX adapter and UPA with laptop Open UPA USB v1.3 programmer software
In EEPROM, select 93C56x16->Read->Save with any name Step 2: Write Key
In TM100 transponder key programmer, select Key Maker->Toyota->Corolla->ECU->-2004 (93C560(4C))
Press Open Dump File, open saved EEPROM file read by UPA
Select key position (from any of the 4 positions) to add new key
Press Write Key
Save the new file created with any name (here we have used Key 1)
Open Last saved file again to add another key at any pisition you like
Press Write Key
Save new file again with some other name (here Key 2)
Open last saved file to verify newly added keys Step 3: Write data back Go back to UPA software
Open last saved file in TM100
Select 93C56x16 and press Program to write new file to EEPROM
Solder EEPROM chip back to ECU
Reinstall ECU to vehicle
Test the new keys and start car.
Done.
www.obdii365.com
Program Toyota Corolla -2004 4C Lost Key with UPA & TM100
