LOS ANGELES — A judge has referred a former in-house attorney for Toyota Motor Sales USA Inc. to the State Bar of California for possibly violating the rules of professional conduct by disclosing confidential attorney-client information.

Toyota Motor Sales U.S.A. Inc., based in Torrance, requested an injunction to force Dimitrios Biller, former national managing counsel in the legal services group in charge of Toyota’s rollover litigation program, to stop publicizing privileged information about Toyota’s lawsuits, settlements and litigation policies.