FATIGUED FLT CREW OF A319; ANTICIPATING APCH TO RWY 22R AT ORD FAILS TO REPROGRAM FMGC WHEN CLRED FOR AN APCH TO RWY 22L. FLY THROUGH FINAL APCH COURSE BEFORE RECOGNIZING THEIR ERROR.

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THIS WAS TOTALLY DUE TO FATIGUE. THE NIGHT BEFORE I WAS AWAKENED BY CRANK CALLS FROM MY TEENAGER'S FRIEND AND AFTER THE ONE AT XA00 WAS UNABLE TO GET BACK TO SLEEP; EVEN THOUGH I TRIED UNTIL XI00. I DISCUSSED WITH FRIENDS MY FATIGUE AND CONSIDERED CALLING IN FATIGUED FOR THE TRIP. THE RPT TIME FOR THE TRIP WAS XN00 THAT AFTERNOON; ORD-DCA; DCA-ORD AND ORD-CLE. I TOOK THE MIDDLE LEG AS IT WOULD BE LESS TIRING. ON THE KNOX 3 ARR TO ORD WE ARE USUALLY GIVEN RWY 22R AND I PUT THAT IN THE FMGC AND BRIEFED FOR A VISUAL TO RWY 22R; BACKED UP WITH THE ILS. HOWEVER; WE WERE GIVEN A HEADING TO INTERCEPT FINAL TO RWY 22L AND NEITHER THE FO; NOR I NOTICED THE CHANGE. AS I OVERSHOT THE RWY 22L LOC; INTENDING TO INTERCEPT THE RWY 22R LOC; THE FO SAID SOMETHING; AS HE'D SEEN THE RWY 22L RWY VISUALLY. I WAS MAINLY STAYING INSIDE OF THE INTERCEPT. ATC ALSO ASKED WHICH RWY WE WERE GOING TO AND I RETURNED TO RWY 22L AND LANDED WITHOUT EVENT. NO TCASII EVENTS OCCURRED; ALTHOUGH THERE WAS TFC THAT WAS POINTED OUT TO US TURNING A CLOSE FINAL TO RWY 22R; BUT HE WAS NO FACTOR TO US. THIS IS A CLR CASE OF COMPLACENCY MAGNIFIED BY EXHAUSTION. THE FO FLEW THE LAST LEG THAT NIGHT AND THEN WE HAD LESS THAN 10 HRS IN THE HOTEL IN CLE; WHICH WAS NOT ENOUGH TO REPLENISH ME; BEING SO EXHAUSTED; AS I WAS ABLE TO ONLY GET 6 HRS SLEEP. THE NEXT AM WE DEADHEADED CLE-ORD AND I CALLED IN FATIGUED ON THE DEADHEAD; REFUSING MY NEXT 2 LEGS; A DCA TURN.