Linebacker Aldon Smith has made unspecified promises to the 49ers, coach Jim Harbaugh said Friday morning on a radio appearance.

And Harbaugh suggested the 49ers can make some changes high in the organization to better help players who experience off-field problems.

“I want you to know where I stand, and that’s due process,” Harbaugh said on KNBR’s Murph and Mac Show. “And other place I stand is that I can help someone, we can help someone.”

Smith has gained as much notoriety for his off-field problem as he’s achieved fame for his 42 quarterback sacks in 43 games since entering the NFL as the 49ers’ No. 7 overall pick in 2011.

“He’s doing well,” Harbaugh said of Smith. “He’s showing up. He’s working hard. He’s listening and he has the opportunity to do what he says he’s going to do. That’s what we’re all very hopeful for.”

Smith pleaded “no contest” last week to three felony weapons charges and two misdemeanor DUI counts in Santa Clara Superior Court. The two DUI counts consist of the basic DUI, as well as having a blood-alcohol level of nearly twice the legal limit, stemming from an incident in September.

Smith is scheduled for sentencing on July 25 – two days after the 49ers open training camp in Santa Clara. Smith faces from probation and no jail time to four years and four months in jail.