WARNING: This page is about a different car, the 1987 Acura Legend and 1986 Acura Legend. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Code 12, EGR System Test Chart (Coupe - 1 Of 4)
Fig 2: Code 12, EGR System Test Chart (Coupe - 2 Of 4)
Fig 3: Code 12, EGR System Test Chart (Coupe - 3 Of 4)
Fig 4: Code 12, EGR System Test Chart (Coupe - 4 Of 4)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 5: Code 12, EGR System Test Chart (Sedan - 1 Of 4)
Fig 6: Code 12, EGR System Test Chart (Sedan - 2 Of 4)
Fig 7: Code 12, EGR System Test Chart (Sedan - 3 Of 4)
Fig 8: Code 12, EGR System Test Chart (Sedan: 4 Of 4)