Toyota
Dodge Durango
 Service Manual
Fuel System » Fuel injection system » Description and operation
Throttle body

DESCRIPTION

The throttle body is located on the intake manifold.

Fuel does not enter the intake manifold through the throttle body. Fuel is sprayed into the manifold by the fuel injectors.

OPERATION

Filtered air from the air cleaner enters the intake manifold through the throttle body. The throttle body contains an air control passage controlled by an Idle Air Control (IAC) motor. The air control passage is used to supply air for idle conditions. A throttle valve (plate) is used to supply air for above idle conditions.

Certain sensors are attached to the throttle body.

The accelerator pedal cable, speed control cable and transmission control cable (when equipped) are connected to the throttle body linkage arm.

A (factory adjusted) set screw is used to mechanically limit the position of the throttle body throttle plate. Never attempt to adjust the engine idle speed using this screw. All idle speed functions are controlled by the PCM.

    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

    Dodge Durango Service Manual / Fuel System / Fuel injection system / Description and operation / Throttle body

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