Honda Fit manuals

Honda Fit: Fuel and Emissions System Description - Electronic Throttle Control System

Second generation (2007-2024) / Honda Fit 2007-2024 Repair Manual / Powertrain / Engine / Emissions / General / Fuel and Emissions System Description - Electronic Throttle Control System

Electronic Throttle Control System

The throttle is electronically controlled by the electronic throttle control system (ETCS). Refer to the system diagram to see a functional layout of the system.

Idle control: When the engine is idling, the ECM/PCM controls the throttle actuator to maintain the proper idle speed according to engine loads.

Acceleration control: When the accelerator pedal is pressed, the ECM/PCM opens the throttle valve depending on the accelerator pedal position (APP) sensor signal.

Cruise control: The ECM/PCM controls the throttle actuator to maintain the set speed when cruise control is operating. The throttle actuator takes the place of the cruise control actuator.

Accelerator Pedal Position (APP) Sensor

As the accelerator pedal position changes, the sensor varies the signal voltage to the ECM/PCM which then controls the throttle position.

 

Throttle Body

The throttle body is a single-barrel side draft type. To prevent icing of the throttle plate, the lower portion of the throttle valve is heated by engine coolant from the cylinder head.


Electronic Throttle Control System   Diagram

The electronic throttle control system consists of the throttle actuator, TP sensor A/B, the APP sensor A/B, the ETCS control relay, and the ECM/PCM.

See also:

Lower Front Bumper Grille Replacement
Special Tools Required KTC Trim Tool Set SOJATP2014 *Available through the Honda Tool and Equipment Program; call 888-424-6857 With Front Fog Lights NOTE: Take care not to scratch ...

Air Cleaner Removal/Installation
Disconnect the MAF sensor/IAT sensor connector(A), then remove the air cleaner cover (B) and the air cleaner element (C). NOTE: Be careful not to damage the MAF sensor/IAT sensor on the air ...

Spark Plug Inspection
Remove the ignition coils and the spark plugs. Inspect the electrodes and the ceramic insulator: Burned or worn electrodes may be caused by these conditions: ...

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