Ignition Switch On

This is an OPEN LOOP mode.

When the sequential multi-point fuel injection (SFI) system is activated by the ignition switch, the following actions occur:
- The Powertrain Control Module (PCM) prepositions 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.
- The 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).