Ford Mustang Service Manual: Camshaft Position (CMP) Sensor - 3.8L

Electronic Engine Controls (Description and Operation)

The electronic engine controls consist of the following:

  • powertrain control module (PCM)
  • throttle position (TP) sensor
  • idle air control (IAC) valve
  • engine coolant temperature (ECT) sensor
  • cylinder head temperature sensor
  • camshaft position (CMP) sensor
  • crankshaft position (CKP) sensor
  • mass air flow (MAF) sensor
  • intake air temperature (IAT) sensor
  • heated oxygen sensor (HO2S) - front
  • catalyst monitor sensor - rear
  • wheel speed sensor

The powertrain control module needs the following inputs to calibrate the engine correctly:

  • crankshaft position
  • engine rpm
  • engine load (manifold pressure)
  • atmospheric (barometric) pressure
  • engine coolant temperature

The throttle position sensor:

  • sends the powertrain control module a signal indicating the throttle plate angle.
  • is the main input to the powertrain control module from the driver.

The idle air control valve:

  • controls bypass air around the throttle plate at low speeds.
  • is controlled by the powertrain control module.

The cylinder head temperature sensor:

  • provides a gauge signal for coolant temperature.
  • is mounted on rear of LH cylinder head.
  • sends the powertrain control module a signal indicating engine temperature.
  • resistance decreases as coolant temperature increases.

The camshaft position sensor:

  • sends the powertrain control module a signal indicating camshaft position, used for fuel synchronization.

The crankshaft position sensor:

  • sends the powertrain control module a signal indicating crankshaft position.
  • is essential for calculating spark timing.

The mass air flow sensor:

  • sends the powertrain control module a signal indicating mass air flow rate of air entering the engine.

The intake air temperature sensor:

  • sends the powertrain control module a signal indicating the temperature of the air entering the engine.

The heated oxygen sensor:

  • has the ability to create a voltage signal depending on exhaust oxygen content.
  • provides feedback information to the powertrain control module used to calculate fuel delivery.

The rear catalyst monitor sensor:

  • monitors oxygen content after the oxygen flows through the catalytic converter.
  • provides a voltage to the powertrain control module used to calculate catalytic converter integrity.

The wheel speed sensor:

  • sends a signal to the powertrain control module indicating wheel speed.
    Temperature and Manifold Absolute Pressure (T-MAP) Sensor - Cobra
    Electronic Engine Controls (Description and Operation) The electronic engine controls consist of the following: powertrain control module (PCM) throttle position (TP) sensor idle air contr ...

    Camshaft Position (CMP) Sensor - 4.6L
    Electronic Engine Controls (Description and Operation) The electronic engine controls consist of the following: powertrain control module (PCM) throttle position (TP) sensor idle air contr ...

    Other materials:

    Installation
    Removal CAUTION: Suspension fasteners are critical parts because they affect performance of vital components and systems and their failure can result in major service expense. A new part with the same part number must be installed if installation becomes nec ...

    Installation
    Removal 1. Disconnect the battery ground cable (14301). For additional information, refer to Section. 2. Remove the transmission. For additional information, refer to Section. 3. Remove the air cleaner outlet tube (9B659). For additional information, refer ...

    Installation
    Removal 1. Raise and support the vehicle. 2. Remove the rear wheel and tire assemblies. 3. CAUTION: Remove the rear brake calipers to prevent drag during the drive pinion bearing preload adjustment. CAUTION: Do not allow the calipers to hang from the bra ...