Air Induction System

Air Induction System:

The air induction system supplies filtered air to the engine to mix with the fuel for combustion purposes. The air induction system consists of:

- Air cleaner to intake manifold tube
- Engine air cleaner
- Mass air flow (MAF) sensor
- Engine intake air resonator
- Idle Air Control Bypass Air (IAC BPA) valve
- Throttle body
- Engine air cleaner intake tube
- Intake Air Temperature (IAT) sensor.
- Engine intake air resonator.

The MAF is mounted to the engine air cleaner and is used to measure air flow passing into the engine. The heated resistor inside the MAF detects the amount of airflow and notifies the powertrain control module (PCM) with an input signal.

The intake air temperature sensor detects the incoming airflow temperature. As the air temperature decreases, the resistance of the sensor increases. The resistance, sent to the PCM as an input signal, is used as a temperature-to-density calculation. The PCM can then determine the air density and cold enrichment fuel flow.