Electronic Engine Controls

Electronic Engine Controls

The electronic engine controls consist of the following:

- Camshaft Position (CMP) sensor

- Catalyst Monitor Sensor (CMS)

- Crankshaft Position (CKP) sensor

- Cylinder Head Temperature (CHT) sensor

- Heated Oxygen Sensor (HO2S)

- Knock Sensor (KS)

- Mass Air Flow (MAF) sensor

- PCM

- Throttle Position (TP) sensor

The PCM needs the following inputs to calibrate the engine correctly:

- Air temperature

- Throttle position

- Crankshaft position

- Camshaft position

- Engine rpm

- Cylinder head temperature

- Amount of engine detonation

- Engine coolant temperature

- Mass airflow

Camshaft Position (CMP) Sensor

The CMP (Camshaft Position) sensor:

- sends the PCM a signal indicating camshaft position used for fuel synchronization and coil firing.

For removal and installation, refer to Camshaft Position (CMP) Sensor Service and Repair.

Crankshaft Position (CKP) Sensor

The CKP (Crankshaft Position) sensor:

- sends the PCM a signal indicating crankshaft position.

- is essential for calculating spark timing.

For removal and installation, refer to Crankshaft Position (CKP) Sensor Service and Repair.

Cylinder Head Temperature (CHT) Sensor

The CHT (Cylinder Head Temperature) sensor:

- is mounted into the front of the left cylinder head and is not connected to any coolant passages.

- sends a signal to the PCM indicating the cylinder head temperature.

For removal and installation, refer to Cylinder Head Temperature (CHT) Sensor Service and Repair.

Heated Oxygen Sensor (HO2S) and Catalyst Monitor Sensor (CMS)

The HO2S (Heated Oxygen Sensor) and CMS (Catalyst Monitor Sensor) :

- have the ability to create a voltage signal dependent on exhaust oxygen content.

- provide feedback information to the PCM used to calculate fuel delivery.

For removal and installation, refer to Heated Oxygen Sensor (HO2S) and Catalyst Monitor Sensor - Exploded View [1][2]Exploded Views and Heated Oxygen Sensor (HO2S) Heated Oxygen Sensor (HO2S) or Catalyst Monitor Sensor Catalyst Monitor Sensor.

Knock Sensor (KS) Sensor

The KS (Knock Sensor) :

- is located in the intake valley of the cylinder block.

- sends a signal to the PCM indicating engine detonation.

For removal and installation, refer to Knock Sensor (KS) Service and Repair.

Mass Air Flow (MAF) Sensor

The MAF (Mass Air Flow) sensor:

- sends the PCM a signal indicating mass airflow rate of air entering the engine.

- incorporates the Intake Air Temperature (IAT) sensor.

For removal and installation, refer to Mass Air Flow (MAF) Sensor Service and Repair.

Throttle Position (TP) Sensor

The TP (Throttle Position) sensor:

- sends the PCM a signal indicating the throttle plate angle.

- is the main input to the PCM from the driver.

For removal and installation, refer to Throttle Position (TP) Sensor - 5.4L or Throttle Position (TP) Sensor - 6.8L .