Honda CIVIC 10G 2016 Electronic Throttle Control Page 1

Electronic Throttle Control System Description
Overview
The electronic throttle control system (ETCS) opens and closes the throttle valve by electronic control. This system consists of a
throttle actuator built into the throttle body, throttle valve and throttle position (TP) sensor A/B, accelerator pedal position (APP) sensor
A
/B, ETCS driver built into the powertrain control module (PCM)
.
ETCS is a system that opens and closes the throttle valve electronically, it has various functions such as:
Idle Control Function
Accelerator Control Function
Fail-Safe Function
Relationship Action with Other Systems
Control
When the accelerator pedal is operated, APP sensors are driven and the accelerator pedal position is detected. The accelerator pedal
position is delivered to the PCM, and the PCM drives the throttle actuator in the throttle body based on the delivered throttle pedal
position to open or close the throttle valve.
Throttle position is detected by the TP sensors in the throttle body and delivered to the PCM.
The PCM drives the throttle actuator to control the throttle position during idling, during various system control, and when necessary,
as well as based on the signals from the APP sensors.
Change of ETCS control (with ECON)
The ECON ON mode softens throttle valve control to reduce fuel consumption when the accelerator pedal is roughly depressed. Also,
throttle opening becomes slow in comparison with the ECON OFF mode. However, if the accelerator pedal is depressed more than a
certain level, control automatically becomes equivalent to the ECON OFF mode in order to ensure the acceleration.
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Contents Summary of Electronic Throttle Control

  • Page 1Electronic Throttle Control System Description Overview The electronic throttle control system (ETCS) opens and closes the throttle valve by electronic control. This system consists of a throttle actuator built into the throttle body, throttle valve and throttle position (TP) sensor A/B, accelerator
  • Page 2cardiagn.com Change of ETCS control (Type-R) In the +R mode and the SPORT mode, the PCM varies the throttle valve opening characteristics. Accelerator response is improved by correcting the amount that the accelerator pedal is actually depressed by moving it in the throttle valve open direction.
  • Page 3Acceleration Sensor Removal, Installation, and Inspection NOTE: How to read the torque specifications. Do not damage or drop the acceleration sensor as it is sensitive. Do not use power tools when removing the acceleration sensor. Front 1. Driver's Dashboard Lower Cover - Remove 2. Acceleration Sens
  • Page 43. All Removed Parts - Install cardiagn.com 1. Install the parts in the reverse order of removal. 1. HDS - Connect 2. Acceleration sensor - Inspection 1. Turn the vehicle to the OFF (LOCK) mode. 2. Connect the acceleration sensor connector. 3. Turn the vehicle to the ON mode. 4. With the HDS, check
  • Page 5cardiagn.co
  • Page 6Accelerator Pedal Module Removal and Installation NOTE: Where icon is shown, click for further information. 1 cardiagn.com Detailed information, notes and precautions Torque: N·m (kgf·m, lbf·ft) 1. Accelerator Pedal Module - Remove NOTE: The APP sensor is not available separately. Do not disassemble
  • Page 7APP Sensor Signal Inspection NOTE: This procedure checks the APP sensor in its fully closed position. In any other position, the APP sensor stores DTCs which are covered in other troubleshooting procedures. Check for Pending or Confirmed DTCs with the HDS before doing this procedure. If any DTCs are
  • Page 8Yaw Rate-Acceleration Neutral Position Memorization NOTE: The VSA modulator-control unit receives the yaw rate and the acceleration information from the SRS unit. This information is corrected by the neutral position learning of VSA modulator-control unit, performs the VSA control. Follow the proced