Engine Warm Up
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- Engine Temperature (ECT Sensor)
- Manifold Vacuum (MAP Sensor)
- Engine rpm (distributor pick-up)
- Throttle Position (TPS)
- A/C Switch Status
- Battery Voltage
PCM CONTROLS:
- Injector pulse width, (switching the ground on and off twice per engine revolution).
- Idle speed, through the IAC motor.
- Ignition timing.
NOTE: PCM will monitor the ECT sensor, and when the time delay has elapsed and the engine has reached operating temperature, the system will leave warm up mode and go into closed loop operation.