Toyota
Dodge Durango
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Fuel System » Fuel injection system » Description and operation
Power grounds

OPERATION

The Powertrain Control Module (PCM) has 2 main grounds. Both of these grounds are referred to as power grounds. All of the high-current, noisy, electrical devices are connected to these grounds as well as all of the sensor returns. Sensor return is a lownoise, low-current, dedicated ground.

The power ground is used to control ground circuits for the following PCM loads:

  • Generator field winding
  • Fuel injectors
  • Ignition coil(s)
  • Certain relays/solenoids
  • Certain sensors
    More about «Description and operation»:

    Powertrain control module (pcm)

    Modes of operation

    Automatic shutdown (asd) relay sense-pcm input

    Battery voltage-pcm input

    Brake switch-pcm input

    Engine coolant temperature sensor-pcm input

    Five volt sensor supplies-primary and secondary

    Ignition circuit sense-pcm input

    Intake manifold air temperature sensor-pcm input

    Manifold absolute pressure (map) sensor-pcm input

    Oil pressure sensor-pcm input

    Oxygen sensor (o2s)-pcm input

    Power grounds

    Power steering pressure switch- pcm input

    Sensor return-pcm input

    Throttle position sensor (tps)-pcm input

    Vehicle speed and distance-pcm input

    Auto shutdown (asd) relay-pcm output

    Ccd bus (+/-) circuits-pcm outputs

    Data link connector-pcm input and output

    Fuel injectors-pcm output

    Fuel pump relay-pcm output

    Idle air control (iac) motor-pcm output

    Oxygen sensor heater relays-pcm output

    Radiator cooling fan relay-pcm output

    Throttle body

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