July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Code 15 - Ignition Output Signal
WARNING: This page is about a different car, the 1994 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Code 15 Flow Chart (1 Of 2) Ignition Output Signal
Fig 2: Code 15 Flow Chart (2 Of 2) Ignition Output Signal