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TOKYO — Toyota Motor Corp. is fine-tuning a dealer remedy for faulty accelerator pedals in 2.3 million recalled vehicles and aims to announce the fix as early as next week, a person familiar with the matter said.

The procedure involves inserting a metal shim into a gap in the friction lever of the pedal. Doing so will reduce friction and prevent the pedal from sticking, the person said.

“As early as next week, we will have some guidance for dealers,” the source said. “We are still trying to solve a few technical issues.”

Among the last-minute tweaks are testing for durability and ensuring that the remedy is something that dealers can easily employ.