STATE DISPLAYS Mode
WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
This allows technician to read status or values of sensors, inputs/outputs and components. PCM can only recognize high and low status on switch circuits. PCM cannot detect the difference between an open or short circuit or a defective switch. If DRB displays a change between INPUT HIGH and INPUT LOW, it can be assumed that entire switch circuit to PCM is working.