What the sensor is good for
A steering angle sensor reports the steering wheel's position and how quickly it is being turned. Chassis systems use that to make better decisions in corners: braking and stability systems can tell a slide from a turn, traction strategies can react differently mid-corner, and a variable-assist power steering system can change hydraulic pressure to suit the driving. On a Nexus, bringing the signal into the ECU makes it available for logging and for any function or table that can use it as an axis. Compare it with vehicle speed and yaw data and you have a much clearer picture of what the car is doing.
Where to find the settings
The Steering Angle sensor has three areas in NSP.
Main node: calibration
This is where you tell the ECU how the sensor's output turns into an angle. You can type values into the calibration table by hand, or click Load from File to pull in a saved calibration. Once you have a good one, use Save to File to keep a copy for other cars or future maps.
Wiring node: input type and connection
| Setting | Choose | When |
|---|---|---|
| Input Type | Analogue - Voltage | The sensor is wired directly to the ECU |
| Input Type | CAN Input | The angle comes from the car's own sensor over vehicle CAN |
| Connection | An analog input, with the pull-up disabled | The usual choice for a wired-in sensor |
If the car already has a steering angle sensor on its CAN bus, reading it over CAN saves you wiring. See vehicle CAN support to check your platform.
Diagnostics node: DTCs
You can enable high and low voltage fault codes for the sensor and give each one a severity. The severity links to an engine protection level, so a failed sensor can be flagged, or acted on, the way you choose. We usually treat steering angle faults as warnings rather than something that cuts power, since the engine itself doesn't depend on the signal.
Setup checklist
- Wire the sensor to a spare analog input with the pull-up off, or set CAN Input.
- Load or enter the calibration.
- With the wheels straight, confirm the reading is close to center. Turn lock to lock and check both directions read correctly.
- Enable the high and low voltage DTCs at levels just outside the normal range you saw.
Related sensors worth setting up alongside it: wideband O2, knock detection and manifold pressure. If you'd like help integrating chassis sensors, book a free 30-minute consultation.
