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).