Warm Idle

PCM MONITORS:

- Engine Temperature (ECT Sensor)
- Manifold Vacuum (MAP Sensor)
- Charge Temperature Sensor
- Cam and Crankshaft Position (CMP and CKP Sensors)
- Throttle Position (TPS)
- Exhaust Gas Oxygen Content (HO2S)
- A/C Switch Status
- Battery Voltage
- Engine Knock Sensor

PCM CONTROLS:

- Air/fuel ratio - by monitoring O2 input and varying injector pulse width. Switches injector ground on and off twice per engine revolution.
- Idle speed - through the IAC motor.
- Ignition timing.
- Operate A/C Compressor Clutch relay (if selected)