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Honda K24 Swap in Civic / Accord & Electronic Throttle (ETB) Integration

Integrating K24 Drive-By-Wire (DBW) Electronic Throttle Bodies, dual TPS and PPS sensors, PID loop calibration, and CAN-bus cluster integration.

Advanced 1

Adapted from Honda K24 ETB TPS issues (by Jtech2020) , 2005 Honda Accord K24A3 (by Jtech2020) , 2004 Honda Civic Si K20 (by AndreyB) , 2003 Honda Element (by AndreyB)

VIRUXE (@viruxe) Contributor

Overview

Modern K-series swaps (K24A2, K24A3, K24Z) frequently utilize Drive-By-Wire (DBW) Electronic Throttle Bodies (ETB) rather than traditional mechanical throttle cables. This technical guide covers dual TPS/PPS sensor wiring, H-bridge DC motor control, PID tuning, and safety redundancy.

1. Dual TPS & Pedal Position Sensor Wiring

DBW systems require redundant sensor signals to detect sensor failure or short circuits:

  • TPS 1 & TPS 2: Opposite voltage slopes mounted on the throttle body shaft.
  • PPS 1 & PPS 2: Redundant pedal position sensors mounted on the accelerator pedal assembly.
Sensor Pin Function Voltage Range
TPS 1 Main Throttle Position 0.5V (Closed) to 4.5V (WOT)
TPS 2 Secondary Throttle Position 4.5V (Closed) to 0.5V (WOT)
PPS 1 Main Pedal Position 0.8V (Released) to 4.2V (Depressed)
PPS 2 Secondary Pedal Position 0.4V (Released) to 2.1V (Depressed)

2. H-Bridge Motor Control & PID Loop Calibration

The ETB DC motor is driven by a high-current H-bridge driver outputting bi-directional PWM power.

Warning

Incorrect PID gain settings can cause aggressive throttle flutter or uncontrolled wide-open throttle behavior. Perform bench calibration with fuel and ignition disabled before initial engine startup.

Recommended Initial PID Values

  • P (Proportional): 8.0 - 12.0
  • I (Integral): 0.15 - 0.30
  • D (Derivative): 2.0 - 4.0

Applies to

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Acura

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Honda

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Engines 1 link

Honda Engines

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Engine Family K-series
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Credits and source

Source Adapted from Honda K24 ETB TPS issues on rusEFI forum.

Source Adapted from 2005 Honda Accord K24A3 on rusEFI forum.

Source Adapted from 2004 Honda Civic Si K20 on rusEFI forum.

Source Adapted from 2003 Honda Element on rusEFI forum.