Engine Start-Up Mode
WARNING: This page is about a different car, the 2021 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
This is an Open Loop mode. The following actions occur when the starter motor is engaged.
The PCM receives inputs from:
- Direct battery voltage
- APPS
- ECT sensor
- Crankshaft Position (CKP) sensor
- Manifold IAT sensor
- MAP sensor
- Throttle position sensors (TPS)
- Camshaft Position (CMP) sensor signal
The PCM monitors the CKP sensor. If the PCM does not receive a CKP sensor signal within approximately 3 seconds of cranking the engine, it will shut down the fuel injection system.
Voltage is applied to the fuel injectors with the ASD relay via the PCM. The PCM will then control the injection sequence and injector pulse width by actuating ground circuit to each individual injector on and off.
The PCM determines the proper ignition timing according to input received from the crankshaft position sensor.