What is the legal test for a motion to appeal against a motion for personal injury?

We appointed counsel to represent defendant on appeal. Counsel filed an opening brief setting forth the facts of the case and, pursuant to People v. Wende (1979) 25 Cal.3d 436, 158 Cal.Rptr. 839, 600 P.2d 1071, requesting the court to review the record and to determine whether there are any arguable issues on appeal. Defendant was advised by counsel of the right to file a supplemental brief within 30 days of the date of filing of the opening brief.