Engine Start-Up

This is an OPEN LOOP mode.

When the starter motor is engaged, the Powertrain Control Module (PCM) receives input from:
- Battery voltage
- Crankshaft position (CKP) sensor
- Engine coolant temperature (ECT) sensor
- Intake air temperature (IAT) sensor
- Throttle position sensor (TPS)
- Camshaft position (CMP) sensor
- Starter relay

Based on these inputs, the PCM will:
- Monitor crankshaft position sensor. If no signal is received within 3 seconds, the PCM will shut down the fuel injection system.
- Supply the injectors with a ground path, firing all injectors until the PCM determines crankshaft position.
- Determine proper ignition timing.