Power Steering Pressure (PSP) Switch Test
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
This tests the ability of the PCM to identify a state of change in the power steering fluid pressure. The steering wheel must briefly be turned at least 1/4 turn. This test is done during the KOER self-test.