WASHINGTON — In public, Toyota is running apologetic TV ads and vowing to win back customers' trust. Behind the scenes, the besieged carmaker is trying to learn all it can about congressional investigations, maybe even steer them if it can.

It's part of an all-out drive by the automaker to redeem its once unassailable brand — hit anew Tuesday as its global recall ballooned to 8.5 million cars and trucks. The day's safety recall of 440,000 of its flagship Prius and other hybrids, plus a Tokyo news conference where the company's president read a statement in English pledging to "regain the confidence of our customers," underscored a determination to keep buyers' faith from sinking to unrecoverable depths.

In Washington, facing congressional inquiries and government investigations, Toyota through its lawyers and lobbyists is working full speed to salvage its reputation.