Warm Idle

PCM MONITORS:

- Engine Temperature (ECT Sensor)
- Manifold Vacuum (MAP Sensor)
- Throttle Position (TPS)
- Exhaust Gas Oxygen Content (O2S)
- A/C Switch Status
- Battery Voltage
- Camshaft and Crankshaft Position (CMP and CKP Sensors)

PCM CONTROLS:

- Air/fuel ratio, by varying injector pulse width. Switches injector ground on and off twice per engine revolution.
- Idle speed, through the IAC motor.
- Ignition timing.
- Monitor oxygen sensor and fine tune air/fuel ratio by varying injector pulse width
- Operate A/C Compressor Clutch relay (if selected)