04 Wiring
Electronic throttle
Motor on the H-bridge, two TPS, two pedals.
6 min readUpdated 2026-08
A drive-by-wire install is four analog sensors plus one motor. Race Core expects redundant TPS and redundant pedal. If a pair disagrees, the ECU must be configured to close the throttle — that is the whole safety case.
Motor
- ETB 1+: B7. ETB 1−: B6. These are H-bridge 1. There is no “which is positive” until you try it; if the blade drives the wrong way, swap the two motor wires or invert in software.
- +12 V MR (B23) must be powered. No main-relay feed, no motor.
Sensors
| Sensor | Typical pin | Supply |
|---|---|---|
| TPS 1 | AV 2 (C24) | 5 V Sens 1 |
| TPS 2 | AV 3 (C14) | 5 V Sens 2 if you can — otherwise same rail |
| Pedal 1 | AV 9 (C17) | 5 V Sens 1 |
| Pedal 2 | AV 7 (C16) | 5 V Sens 2 |
A bipolar stepper idle valve can use ETB 2 (B8 / B15) if you are not running a second throttle. Unipolar (5-wire / 6-wire GM-style) steppers are not supported on the H-bridge.