KOER Switch Self-Test: Description

KOER switch self-test is a functional test of PCM performed with ignition key on, engine running. This test will set a DTC if test does not detect a transition on one or more switches. After pressing trigger to start self-test, wait 5 seconds before running through driver operated controls to eliminate chance of setting a false DTC. Accelerator pedal must first be depressed and released to begin test, then parking brake, speed control on, off, set, resume, coast, transmission control or clutch. Depress and release brake pedal last, which will test both the Brake Pressure Applied (BPA) switch and Brake On/Off (BOO) switch.