Deceleration

This is an OPEN LOOP mode.

During deceleration the the Powertrain Control Module (PCM) receives inputs from:
- Air Conditioning Control Position
- Battery voltage
- Camshaft position (CMP) sensor
- Engine coolant temperature (ECT) sensor
- Manifold Absolute Pressure (MAP) sensor
- Intake air temperature (IAT) sensor
- Crankshaft position (CKP) sensor
- Throttle Position Sensor (TPS)

Based on these inputs the PCM will:
- Adjust engine idle speed through the IAC motor.
- Adjust ignition timing.
- Operate A/C Compressor Clutch relay (if selected).
- Ignore oxygen sensor input. The PCM will enter fuel cut-off strategy (under hard deceleration).
- Determine proper injector pulse width and continue injection (under normal deceleration).