What was found
DIVERT ENROUTE, DUE TO DETECTION OF AN UNUSUAL ODOR, OF UNKNOWN SOURCE OR ORIGIN IN COCKPIT AND CABIN. THERE WERE NO SIGNS OF SMOKE (VISUAL). NOTE: NOT OF ELECTRICAL OR A/C MUSTY ODOR. T/S AND RAN APU BLEED AIR AND PAC'S SEPARATE WITH NO DEFECTS. RAN ENGINES AT DIFFERENT PWR SETTINGS AND PAC'S INDIVIDUAL WITH NO DEFECTS. INSPECTED ACM OIL WAS SERVICED TO LIMITS, CLEANED, WATER SOCKS AND PERFORMED ADDITIONAL RUN WITH F/O AND NO DEFECTS NOTED. IAW MM 21-51-00 OF 12-10-01.