Sensors & outputs Position
APP — pedal
Accelerator pedal, dual track · sensor · Position
Two independent potentiometers (or Hall tracks) in one pedal. Split the 5 V rails. Pedal 1 is Analog Volt 9, pedal 2 is Analog Volt 7. Required for electronic throttle; unused on a cable throttle.
Typical parts: Bosch / Hella hanging pedal; GM floor pedal dual-track
Warning — Split the 5 V rails. Track 1 on Sens 1, track 2 on Sens 2. A shorted TPS must not take the pedal with it.
Device pinout
Looking into the pedal connector, polarising key at the top. Two rows of three.
- Connector: 6-way on the pedal (Bosch / Hella typical)
- Layout (looking into the part): 1 · 2 · 3 / 4 · 5 · 6; polarising key top
| Device pin | Function | Type | Race Core | TunerStudio |
|---|---|---|---|---|
| 1 | 5 V track 1 | 5 V | C9 / C21 / C32 | 5 V Sens 1 |
| 2 | Sensor ground track 1 | Ground | C1–C8 / C29 / C31 | Sensor GND |
| 3 | APP 1 signal | Signal | C17 | Analog Volt 9 |
| 4 | 5 V track 2 | 5 V | C10 / C22 / C33 | 5 V Sens 2 |
| 5 | Sensor ground track 2 | Ground | C1–C8 / C29 / C31 | Sensor GND |
| 6 | APP 2 signal | Signal | C16 | Analog Volt 7 |
Wiring notes
- OEM pedals vary the cavity order. Meter: two pins at 5 V (on different rails), two at ground, two signals that move with the pedal.
- Tracks are complementary or different slopes. TunerStudio wants both. A single-track pedal is not a DBW pedal.
- Calibrate APP before TPS, and before commanding more than a few percent duty. See Electronic throttle.
Failure modes
- One track moves and the other is stuck: open 5 V or ground on that track. DBW must not run on one track.
- Both tracks die together: they are on the same 5 V rail. Split Sens 1 and Sens 2.
- Pedal calibration looks backwards: the tracks are complementary. Calibrate both. Do not invert one and hope.