What it does
The DBW Max TPS table caps the throttle opening the ECU will command, as a percentage. Whatever the pedal asks for, the drive by wire system won't open the throttle past this value. It supports up to 4D mapping, so the cap can change with several inputs at once.
When we use it
- Valet or low-power modes: map it against a switch or a trim knob to limit opening.
- Traction in low gears: map it by gear or speed so first gear can't open fully on a street tire.
- Protection: limit opening when coolant is cold or oil temperature is out of range.
- Launch and drag strategy: shape how much throttle is available early in a run.
What to check
- Leave it at 100% everywhere you don't intend to limit. A stray low cell feels like a sudden power loss.
- Confirm the throttle is properly calibrated first. See DBW calibration.
- Log pedal position against throttle position to confirm the cap is only active where you meant it.
Need this diagram? Ask us and we'll send it over with advice for your build.
