What gets calibrated
The Calibration node covers three parts of a drive by wire system: the accelerator pedal position sensor (APP), the throttle position sensor on the throttle body (TPS), and the throttle motor that moves it. Calibration teaches the ECU the real voltages at 0% and 100% so it can scale everything in between.
Do this after the DBW wiring is checked and any time you replace a pedal, throttle body or sensor.
Pedal (APP) calibration
- Switch the ignition to accessory/on without starting. Keep your foot completely off the pedal.
- Click Calibrate. The wizard records the resting position.
- When the Step 2 icon turns dark and Step 1 greys out, push the pedal all the way to its stop and hold it there.
- Click Calibrate again, keeping the pedal pinned until the wizard finishes.
- Look for Calibration Good under Status.
If you're fitting a new pedal, the Bosch DBW pedal assembly is a common choice.
Throttle (TPS) calibration
This one is hands-off. Press Calibrate and the ECU drives the throttle through several positions on its own, recording what the sensors report. Wait until Status shows Calibration Good. On engines with more than one enabled throttle, each is calibrated separately.
The throttle blade moves by itself during calibration. Keep fingers and tools out of the throttle bore.
Voltage limits
| Setting | What it does | Our advice |
|---|---|---|
| Minimum / Maximum APP Voltage | Sets a fault if either pedal sensor goes below or above these limits | Set just outside the calibrated range so a broken wire is caught |
| Minimum / Maximum TPS Voltage | Sets a fault if a throttle sensor goes outside these limits | Same approach. Leave a small margin for normal variation |
These limits are your early warning for a chafed wire or failing sensor, so don't widen them just to make a fault go away.
If calibration fails
Most failures come from a pedal that wasn't held fully down, sensor signals swapped between channels, or a throttle body that's binding. Recheck the wiring, then work through our DBW diagnosis guide. Once calibrated, tune feel with open rate damping and cap opening with Max TPS.
