Cam Sensor
Overview
A cam sensor is used to determine the position of the camshaft, typically relative to the Crank Sensor.
Warning
If the 
Sync Channel T option is changed during the cam sensor configuration, the ECU must be power-cycled before the change will have an effect. Before power-cycling, ensure that the calibration has been committed to Non-volatile memory (NVM).
Camshaft Position Sensor
If a camshaft position sensor is required, similarly to the crank sensor, it is usually a Hall effect sensor or a VR (Variable Reluctance) sensor. The sensor is typically connected to ECU timer T2 which has a software selectable pull-up resistor. It is possible to use a different timer input if required but T2 is the most common choice.
| Sensor Type | T2 Pull-up |
|---|---|
| Hall Effect / Optical | Yes |
| VR / Inductive | No |
As with the crank sensor the cam synchronization edge should be configured.
If you are planning on using the VVC (Variable Valve Control) features then T2 should be configured for both edges, with the appropriate edge for Cam or 4 stroke cycle synchronization selected by the Sync channel T option. VVC control would require configuration with the other direction edge where appropriate (VVC1 source T, VVC2 source T, VVCX1 source T, or VVCX2 source T).
For example:
| Option | Value |
|---|---|
| T2 Rising Edge |
ON |
| T2 Falling Edge |
ON |
| Sync channel T |
“T2 Rise” |
If not using T3-T12 timing inputs they can be switched off with T3 - T12 Disable to avoid any additional CPU overhead.
Camshaft Sensor Filtering
Like the crank sensor, the cam sensor can have hardware filtering applied to it:
- T2 Filter Below - RPM value below which the T2 filter is active.
- T2 Low Sens Above - Reduces the sensitivity of the T2 input above this RPM value, can be useful for VR sensors.