This post is for those locksmith who has the tool without Toyota all key lost function.
In previous posts, we shared the method of reset immo 93C46, Here will discuss the method of reset immo 93C56 to program 2013 lexus ES350 all smart key lost.
Step 1: Reset immo box. Disassemble immo box NO. 89784-33030 which placed in a groove of the back of evaporator under the dash, open box and find the EEPROM chip 93C56 on the board, read the chip by key programmer like Yanhua key mater, VVDI prog etc. Save the data and backup. Modify the data like this: retain the bytes of red underline ,Other bytes all replace with F. Save the data and write it back to EEPROM chip.
Step 2: Reset smart box. Disassemble smart box No. 89990-33330 placed near A-pillar behind glove compartment. Open the box and find the EEPROM chip 93C86 on electronic board. Read the chip with key programmer. Save data and backup. Modify the data like this: retain bytes of red underline, other bytes all replace with F. Save the data and write it back to EEPROM chip.
Step 3: Add the key. Write the modified file back to EEPROM chip, then assemble immo box and smart box back to car. Connect universal key programmer with car OBD, Push START Button of car, run the key programmer and select smart system, follow the steps to make the logo of key fob held close to START button, comes with “beep beep”, that is match successfully. Connect 4th pin and 13th pin of OBD with short cable or paper clip, many light in Dash panel will start flashing, it means the process is going well. Wait for 45 minutes, then remove the line and start the car.
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