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4.18.4 BCU
The FFC connector has a lock mechanism. Do not use force to pull it out.
1. Controller box cover (page 4-182)
2. BCU [A]
Disconnect the FFCs while pressing the lock release levers on its sides. Disconnecting the FFC without releasing the lock may cause the FFC or connector to be damaged, resulting in an SC670 error.
When installing the new BCU
Remove the NVRAM (EEPROM) [A] from the old BCU. Then install it on the new BCU after you replace the BCU.
Replace the NVRAM (page 4-185) if the NVRAM on the old BCU is defective.
Make sure you print out the SMC reports ("SP Mode Data" and "Logging Data") before you replace the NVRAM (EEPROM).