State Display Inputs and Outputs

DESCRIPTION
The switch inputs that are used by the Powertrain Control Module (PCM) have only two states, HI and LOW. Because of the logical process of the PCM, it cannot determine the difference between a selected switch position and an open or shorted circuit, or a defective switch. If the change from OFF to ON or ON to OFF is displayed (scan tool) then it can be assumed that the entire switch circuit to PCM is functional. Connect the scan tool to the vehicle and access "State Displays" then, access "Inputs and Outputs".

STATE DISPLAY INPUTS AND OUTPUTS
- A/C Clutch Relay (if equipped)
- A/C Request Input (if equipped)
- A/C Select Switch (if equipped)
- Alternator Lamp
- Auto Shutdown Relay
- Brake Switch
- Check Engine Lamp
- EMR Lamp
- Inverse J2 Voltage Sense
- Park/Neutral Switch (automatic trans)
- Power Steering Pressure Switch
- Speed Control Set (if equipped)
- Speed Control On/Off (if equipped)
- Speed Control Resume (if equipped)
- Speed Control Vent Solenoid (if equipped)
- Speed Control Vacuum Solenoid (if equipped)
- Starter Switch Sense
- Up-shift Indicator Lamp (manual trans)
- Z2 Voltage Sense