An A319 FMGEC autotuned the MKC ILS 19 frequency after the MCI ILS 19L was selected.

Narrative

I was briefing the visual approach for Runway 19L MCI; while conducting the briefing I noticed that the localizer frequency on the PFD did not match the frequency on the approach plate. The PFD showed a LOC frequency of 109.90 with a course of 060 degrees. The identifier was IMCK. The approach plate showed a frequency of 109.55 inbound course of 188 degrees. The approach plate was current effective May 09. We spoke about the discrepancy and decided we would confirm as we got closer. The airport was VMC and conducting visual approaches to Runway 19L. We were cleared for the approach and I did not rely on my navigational aids as we continued to the airport. We landed and had no further occurrences. While taxiing in I queried the controller about the ILS localizer frequency. He informed us that the frequency on the plate was correct and that the ILS was working properly. While speaking to the ground controller another aircraft chimed in and said the frequency we were displaying on the PFD was for downtown Kansas City airports ILS approach. We think the frequency in the database was incorrect; not the approach plate. No other aircraft reported any problems. We informed the crew that was taking the aircraft outbound of what had transpired. Their Captain said that if Maintenance had conducted a CAT II or III certification that 109.90 is the frequency that is used for that certification. We verified the frequencies selected on the RAD/NAV page and nothing was hard tuned. In addition; when you land all navigation frequencies are erased from the previous flight. I have no further information.