Ignition Switch On

THIS IS AN OPEN LOOP MODE.
When the Powertrain Control Module (PCM) is ACTIVATED by the ignition switch, the following actions occur:
- The PCM preposition the idle air control (IAC) motor.

- The PCM reads atmospheric air pressure from the manifold absolute pressure (MAP) sensor and calculates the basic fuel strategy.

- The PCM monitors the throttle position sensor (TPS) and engine coolant temperature (ECT) sensor input. The PCM uses these inputs to modify fuel strategy.

- Intake air temperature (IAT) sensor is monitored.

- Automatic Shutdown (ASD) relay is energized for 3 seconds.

- Fuel pump is energized for 1 second, unless engine is running or cranking.

- Oxygen sensor heating element is energized.

- Up shift indicator light is illuminated (M/T only).