Program Toyota Corolla -2004 4C Lost Key with UPA & TM100

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
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Disassemble ECU under the dashboard
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Open ECU box, locate EEPROM IC 93C56
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Desolder IC chip and solder it to UPA EEPROM 93CXX adapter using a hot gun
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Connect 93CXX adapter and UPA with laptop
Open UPA USB v1.3 programmer software
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In EEPROM, select 93C56x16->Read->Save with any name
Step 2: Write Key 
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In TM100 transponder key programmer, select Key Maker->Toyota->Corolla->ECU->-2004 (93C560(4C))
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Press Open Dump File, open saved EEPROM file read by UPA
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Select key position (from any of the 4 positions) to add new key
Press Write Key
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Save the new file created with any name (here we have used Key 1)
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Open Last saved file again to add another key at any pisition you like
Press Write Key
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Save new file again with some other name (here Key 2)
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tm100-toyota-corolla-4c-chip-16Open last saved file to verify newly added keys
Step 3: Write data back
Go back to UPA software
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Open last saved file in TM100

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Select 93C56x16 and press Program to write new file to EEPROM

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Solder EEPROM chip back to ECU
Reinstall ECU to vehicle
Test the new keys and start car.

Done.

 

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